ALMA Single Dish Conversion Guide

from importlib.metadata import version
import os

try:
    import xradio

    print("XRADIO version", version("xradio"), "already installed.")
except ImportError as e:
    print(e)
    print("Installing XRADIO")

    os.system("pip install xradio")

    import xradio

    print("xradio version", version("xradio"), " installed.")

XRADIO version 1.1.12a0 already installed.

Download dataset

from toolviper.utils.data import list_files

list_files()

┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━┳━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ file                         ┃ dtype                    ┃ telescope   ┃ size      ┃ mode                        ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━╇━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┩
│ ea25_cal_small_before_fixed… │ CASA MS v2               │ VLA         │ 150170225 │ Holography                  │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ kband_beamcut_small.ms       │ CASA MS v2               │ VLA         │ 17986574  │ Holography(beam cut)        │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ ea25_cal_small_after_fixed.… │ CASA MS v2               │ VLA         │ 150031008 │ Holography                  │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ J1924-2914.ms.calibrated.sp… │ CASA MS v2               │ ALMA        │ 35000000  │ Holography                  │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ extract_holog_verification.… │ json                     │ na          │ 967       │ na                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ holog_numerical_verificatio… │ json                     │ na          │ 1033      │ na                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ locit-input-pha.cal          │ CASA Cal Table           │ VLA         │ 92293     │ antenna location cal table  │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ panel_cutoff_mask            │ npy                      │ na          │ 27150     │ na                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ heuristic_model              │ bin                      │ na          │ 556       │ na                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ panel-input-data             │ na                       │ na          │ 402916    │ na                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ AA2-Mid-sim_00000.ms         │ CASA MS v2               │ SKA Mid     │ 14710912  │ Simulated Interferometer    │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ Antennae_M8.img.zarr         │ zarr                     │ ALMA        │ 12626417  │ Interferometer Mosaic       │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ Antennae_North.cal.lsrk.ms   │ CASA MS v2               │ ALMA        │ 189716793 │ Interferometer Mosaic       │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ Antennae_North.cal.lsrk.spl… │ CASA MS v2               │ ALMA        │ 1560578   │ Interferometer Mosaic       │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ complex_valued_uv.im         │ image                    │ Simulated   │ 562110    │ Simulated                   │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ demo_simulated.im            │ image                    │ Simulated   │ 15321745  │ Simulated                   │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ no_mask.im                   │ image                    │ Simulated   │ 4252      │ Simulated                   │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ small_lofar.ms               │ CASA MS v2               │ LOFAR       │ 10091260  │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ small_meerkat.ms             │ CASA MS v2               │ MeerKAT     │ 2392258   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ global_vlbi_gg084b_reduced.… │ CASA MS v2               │ GLOBAL VLBI │ 15701018  │ VLBI                        │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ VLBA_TL016B_split_lsrk.ms    │ CASA MS v2               │ VLBA        │ 9399847   │ VLBI                        │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ ngEHT_E17A10.0.bin0000.sour… │ CASA MS v2               │ ngEHT       │ 11082603  │ Simulated Interferometer    │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ venus_ephem_test.ms          │ CASA MS v2               │ ALMA        │ 16758430  │ Interferometer Ephemeris    │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ sdimaging.ms                 │ CASA MS v2               │ ALMA        │ 29718841  │ Single Dish                 │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ ALMA_uid___A002_X1003af4_X7… │ CASA MS v2               │ ALMA        │ 29593547  │ Interferometer Ephemeris    │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ VLASS3.2.sb45755730.eb46170… │ CASA MS v2               │ VLA         │ 69019704  │ Interferometer Ephemeris    │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ feather_sim_vla_c1_pI.im     │ image                    │ Simulated   │ 62246951  │ Simulated                   │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ feather_sim_sd_c1_pI.im      │ image                    │ Simulated   │ 67218042  │ Simulated                   │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ Antennae_fld1_casa_lsrk.ps.… │ Msv4                     │ ALMA        │ 9314803   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ Antennae_fld1_topo.ps.zarr   │ Msv4                     │ ALMA        │ 9867649   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ Antennae_North.cal.lsrk.spl… │ Msv4                     │ ALMA        │ 3430000   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ Antennae_North.cal.lsrk.ps.… │ Msv4                     │ ALMA        │ 2040000   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ feather_model_convolved      │ Model                    │             │ 61364929  │ Simulated                   │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ feather.im                   │ CASA Image               │             │ 67150892  │ Simulated                   │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ int.zarr                     │ Zarr Image               │             │ 65512355  │ Simulated                   │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ sd.zarr                      │ Zarr Image               │             │ 67150892  │ Simulated                   │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ ska_low_sim_18s.ms           │ CASA MS v2               │ SKA Low     │ 8866100   │ Simulated                   │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ VLBA_TL016B_split.ms         │ CASA MS v2               │ VLBA        │ 9402465   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ ngEHT_E17A10.0.bin0000.sour… │ CASA MS v2               │ ngEHT       │ 11099488  │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ uid___A002_X1015532_X1926f.… │ CASA MS v2               │ ALMA        │ 6299859   │ Single Dish                 │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ uid___A002_Xae00c5_X2e6b.sm… │ CASA MS v2               │ ALMA        │ 7351298   │ Single Dish                 │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ uid___A002_Xced5df_Xf9d9.sm… │ CASA MS v2               │ ALMA        │ 7351298   │ Single Dish                 │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ uid___A002_Xe3a5fd_Xe38e.sm… │ CASA MS v2               │ ALMA        │ 16122776  │ Single Dish                 │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ SNR_G55_10s.split.ms         │ CASA MS v2               │ VLA         │ 8648349   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ 59749_bp_8beams_pattern.ms   │ CASA MS v2               │ ASKAP       │ 8137335   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ 59750_altaz_2settings.ms     │ CASA MS v2               │ ASKAP       │ 3669608   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ 59754_altaz_2weights_0.ms    │ CASA MS v2               │ ASKAP       │ 3521937   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ 59754_altaz_2weights_15.ms   │ CASA MS v2               │ ASKAP       │ 3538081   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ 59755_eq_interleave_0.ms     │ CASA MS v2               │ ASKAP       │ 7525050   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ 59755_eq_interleave_15.ms    │ CASA MS v2               │ ASKAP       │ 7493404   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ gmrt.ms                      │ CASA MS v2               │ GMRT        │ 2125130   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ checksum.hash                │ hash                     │ NA          │ 20        │ NA                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ refim_point_im_casa_hogbom_… │ NA                       │ NA          │ 257051    │ NA                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ 3c286_Band6_5chans_lsrk_com… │ NA                       │ NA          │ 22762594  │ NA                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ twhya_selfcal_5chans_lsrk_c… │ NA                       │ NA          │ 7027733   │ NA                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ twhya_selfcal_5chans_lsrk_x… │ NA                       │ NA          │ 5271957   │ NA                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ twhya_selfcal_11chans_lsrk_… │ CASA MS v2               │ ALMA        │ 2555984   │ Interferometer              │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ casa_hogbom_deconv.residual  │ CASA MS v2               │ NA          │ 968492    │ NA                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ test_hogbom_multisrc.psf     │ CASA MS v2               │ NA          │ 972188    │ NA                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ test_hogbom_multisrc.residu… │ CASA MS v2               │ NA          │ 959913    │ NA                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ refim_point_im.psf           │ CASA MS v2               │ NA          │ 238662    │ NA                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ refim_point_im.residual      │ CASA MS v2               │ NA          │ 242965    │ NA                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ absolute_off                 │ ASDM                     │ ALMA SD     │ 245676406 │ NA                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ 3c286_Band6_5chans_lsrk_rob… │ MSv4                     │ NA          │ 16705461  │ NA                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ 3c286_Band6_5chans_lsrk_rob… │ FITS                     │ NA          │ 21054726  │ NA                          │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ kband_beamcut_small.beamcut… │ Astrohack beamcut file   │ VLA         │ 411479    │ Holography                  │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ ref_beamcut_products         │ Beamcut export products  │ VLA         │ 1068652   │ beamcut                     │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ ref_locit_products           │ Locit export products    │ VLA         │ 520143    │ Antenna position            │
│                              │                          │             │           │ corrections                 │
├──────────────────────────────┼──────────────────────────┼─────────────┼───────────┼─────────────────────────────┤
│ ref_position_products        │ Position export products │ VLA         │ 1704935   │ Antenna position            │
│                              │                          │             │           │ corrections                 │
└──────────────────────────────┴──────────────────────────┴─────────────┴───────────┴─────────────────────────────┘

import toolviper

toolviper.utils.data.download(file="sdimaging.ms")

[2026-01-21 13:05:05,166]     INFO    viperlog:  Downloading from [cloudflare] ....

  Download List 
 ───────────────
  sdimaging.ms

[2026-01-21 13:05:05,168]     INFO    viperlog:  File exists: sdimaging.ms

ALMA Single Dish Data

Dataset	Telescope	Multi-Target	OFF Position	Ephemeris	Scan Pattern
uid___A002_Xced5df_Xf9d9.small	ALMA		horizontal		raster
uid___A002_X1015532_X1926f.small	ALMA		relative	x	raster
uid___A002_Xe3a5fd_Xe38e.small	ALMA	x	absolute		raster
uid___A002_Xae00c5_X2e6b.small	ALMA		relative	x	fast

• OFF position:

  • absolute: OFF position has its own field entry in the FIELD table.

  • relative: OFF is a fixed position specified as an offset coordinate relative to the ON position.

  • horizontal: OFF is also an offset position relative to the ON position but specified so that its elevation value is always close to the ON position (meaning that the OFF position is moving with time).

• Scan pattern: raster scan/fast scan.

  • raster: Scan is, as the name indicates, a raster pattern with a relatively long integration time (0.1-1 sec) and channelized spectral window.

  • fast: Scan is either a Lissajous or double-circle pattern with short integration time (1 msec) and single-channel spectral window.

import toolviper
ms_file = "uid___A002_Xced5df_Xf9d9.small.ms"
toolviper.utils.data.download(file=ms_file)

[2026-01-21 13:05:05,188]     INFO    viperlog:  Downloading from [cloudflare] ....

  Download List                     
 ───────────────────────────────────
  uid___A002_Xced5df_Xf9d9.small.ms

[2026-01-21 13:05:05,190]     INFO    viperlog:  File exists: uid___A002_Xced5df_Xf9d9.small.ms

Setup Dask Client

from toolviper.dask import local_client

viper_client = local_client(cores=4, memory_limit="4GB")
viper_client

[2026-01-21 13:05:05,218]     INFO    viperlog:  Module path: /Users/jsteeb/miniforge3/envs/timg/lib/python3.13/site-packages/toolviper
[2026-01-21 13:05:05,221]  WARNING    viperlog:  It is recommended that the local cache directory be set using the dask_local_dir parameter.
[2026-01-21 13:05:05,838]     INFO    viperlog:  Client <MenrvaClient: 'tcp://127.0.0.1:54603' processes=4 threads=4, memory=14.90 GiB>

Client

MenrvaClient-b714fb10-f6f3-11f0-8861-80a9970f900d

Connection method: Cluster object	Cluster type: distributed.LocalCluster
Dashboard: http://127.0.0.1:8787/status

Cluster Info

LocalCluster

0d711405

Dashboard: http://127.0.0.1:8787/status	Workers: 4
Total threads: 4	Total memory: 14.90 GiB
Status: running	Using processes: True

Scheduler Info

Scheduler

Scheduler-9f67cc50-b58c-41ef-abbb-f72954ce1bb7

Comm: tcp://127.0.0.1:54603	Workers: 4
Dashboard: http://127.0.0.1:8787/status	Total threads: 4
Started: Just now	Total memory: 14.90 GiB

Workers

Worker: 0

Comm: tcp://127.0.0.1:54614	Total threads: 1
Dashboard: http://127.0.0.1:54618/status	Memory: 3.73 GiB
Nanny: tcp://127.0.0.1:54606
Local directory: /var/folders/b7/dx896v1x4yjb9v6rvs_n2hs00000gp/T/dask-scratch-space/worker-fl5cj7al
Tasks executing:	Tasks in memory:
Tasks ready:	Tasks in flight:
CPU usage: 0.0%	Last seen: Just now
Memory usage: 67.80 MiB	Spilled bytes: 0 B
Read bytes: 0.0 B	Write bytes: 0.0 B

Worker: 1

Comm: tcp://127.0.0.1:54615	Total threads: 1
Dashboard: http://127.0.0.1:54619/status	Memory: 3.73 GiB
Nanny: tcp://127.0.0.1:54608
Local directory: /var/folders/b7/dx896v1x4yjb9v6rvs_n2hs00000gp/T/dask-scratch-space/worker-sjh05mn1
Tasks executing:	Tasks in memory:
Tasks ready:	Tasks in flight:
CPU usage: 0.0%	Last seen: Just now
Memory usage: 67.22 MiB	Spilled bytes: 0 B
Read bytes: 0.0 B	Write bytes: 0.0 B

Worker: 2

Comm: tcp://127.0.0.1:54616	Total threads: 1
Dashboard: http://127.0.0.1:54622/status	Memory: 3.73 GiB
Nanny: tcp://127.0.0.1:54610
Local directory: /var/folders/b7/dx896v1x4yjb9v6rvs_n2hs00000gp/T/dask-scratch-space/worker-ne1mow_b
Tasks executing:	Tasks in memory:
Tasks ready:	Tasks in flight:
CPU usage: 0.0%	Last seen: Just now
Memory usage: 67.31 MiB	Spilled bytes: 0 B
Read bytes: 0.0 B	Write bytes: 0.0 B

Worker: 3

Comm: tcp://127.0.0.1:54617	Total threads: 1
Dashboard: http://127.0.0.1:54624/status	Memory: 3.73 GiB
Nanny: tcp://127.0.0.1:54612
Local directory: /var/folders/b7/dx896v1x4yjb9v6rvs_n2hs00000gp/T/dask-scratch-space/worker-w0x7vura
Tasks executing:	Tasks in memory:
Tasks ready:	Tasks in flight:
CPU usage: 0.0%	Last seen: Just now
Memory usage: 67.59 MiB	Spilled bytes: 0 B
Read bytes: 0.0 B	Write bytes: 0.0 B

Convert to Processing Set

from xradio.measurement_set import convert_msv2_to_processing_set
ps_store = ms_file.replace(".ms", ".ps.zarr")

convert_msv2_to_processing_set(
    in_file=ms_file,
    out_file=ps_store,
    parallel_mode="partition",
    persistence_mode='w',
)

[2026-01-21 13:05:07,569]     INFO    viperlog:  Updated partition scheme used: ['DATA_DESC_ID', 'OBS_MODE', 'OBSERVATION_ID', 'EPHEMERIS_ID']
[2026-01-21 13:05:07,576]     INFO    viperlog:  Number of partitions: 20
[2026-01-21 13:05:07,576]     INFO    viperlog:  OBSERVATION_ID [0], DDI [0], STATE [10], FIELD [1], SCAN [2, 4, 6, 8, 10, 12, 14, 16, 18], EPHEMERIS [-1]
[2026-01-21 13:05:07,577]     INFO    viperlog:  OBSERVATION_ID [0], DDI [1], STATE [10], FIELD [1], SCAN [2, 4, 6, 8, 10, 12, 14, 16, 18], EPHEMERIS [-1]
[2026-01-21 13:05:07,577]     INFO    viperlog:  OBSERVATION_ID [0], DDI [2], STATE [10], FIELD [1], SCAN [2, 4, 6, 8, 10, 12, 14, 16, 18], EPHEMERIS [-1]
[2026-01-21 13:05:07,577]     INFO    viperlog:  OBSERVATION_ID [0], DDI [3], STATE [10], FIELD [1], SCAN [2, 4, 6, 8, 10, 12, 14, 16, 18], EPHEMERIS [-1]
[2026-01-21 13:05:07,578]     INFO    viperlog:  OBSERVATION_ID [0], DDI [0], STATE [11], FIELD [1], SCAN [2, 4, 6, 8, 10, 12, 14, 16, 18], EPHEMERIS [-1]
[2026-01-21 13:05:07,578]     INFO    viperlog:  OBSERVATION_ID [0], DDI [1], STATE [11], FIELD [1], SCAN [2, 4, 6, 8, 10, 12, 14, 16, 18], EPHEMERIS [-1]
[2026-01-21 13:05:07,579]     INFO    viperlog:  OBSERVATION_ID [0], DDI [2], STATE [11], FIELD [1], SCAN [2, 4, 6, 8, 10, 12, 14, 16, 18], EPHEMERIS [-1]
[2026-01-21 13:05:07,579]     INFO    viperlog:  OBSERVATION_ID [0], DDI [3], STATE [11], FIELD [1], SCAN [2, 4, 6, 8, 10, 12, 14, 16, 18], EPHEMERIS [-1]
[2026-01-21 13:05:07,579]     INFO    viperlog:  OBSERVATION_ID [0], DDI [0], STATE [12], FIELD [1], SCAN [2, 4, 6, 8, 10, 12, 14, 16, 18], EPHEMERIS [-1]
[2026-01-21 13:05:07,580]     INFO    viperlog:  OBSERVATION_ID [0], DDI [1], STATE [12], FIELD [1], SCAN [2, 4, 6, 8, 10, 12, 14, 16, 18], EPHEMERIS [-1]
[2026-01-21 13:05:07,580]     INFO    viperlog:  OBSERVATION_ID [0], DDI [2], STATE [12], FIELD [1], SCAN [2, 4, 6, 8, 10, 12, 14, 16, 18], EPHEMERIS [-1]
[2026-01-21 13:05:07,580]     INFO    viperlog:  OBSERVATION_ID [0], DDI [3], STATE [12], FIELD [1], SCAN [2, 4, 6, 8, 10, 12, 14, 16, 18], EPHEMERIS [-1]
[2026-01-21 13:05:07,581]     INFO    viperlog:  OBSERVATION_ID [0], DDI [0], STATE [13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53], FIELD [1], SCAN [3, 5, 7, 9, 11, 13, 15, 17], EPHEMERIS [-1]
[2026-01-21 13:05:07,581]     INFO    viperlog:  OBSERVATION_ID [0], DDI [1], STATE [13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53], FIELD [1], SCAN [3, 5, 7, 9, 11, 13, 15, 17], EPHEMERIS [-1]
[2026-01-21 13:05:07,582]     INFO    viperlog:  OBSERVATION_ID [0], DDI [2], STATE [13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53], FIELD [1], SCAN [3, 5, 7, 9, 11, 13, 15, 17], EPHEMERIS [-1]
[2026-01-21 13:05:07,582]     INFO    viperlog:  OBSERVATION_ID [0], DDI [3], STATE [13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53], FIELD [1], SCAN [3, 5, 7, 9, 11, 13, 15, 17], EPHEMERIS [-1]
[2026-01-21 13:05:07,582]     INFO    viperlog:  OBSERVATION_ID [0], DDI [0], STATE [14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52], FIELD [1], SCAN [3, 5, 7, 9, 11, 13, 15, 17], EPHEMERIS [-1]
[2026-01-21 13:05:07,583]     INFO    viperlog:  OBSERVATION_ID [0], DDI [1], STATE [14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52], FIELD [1], SCAN [3, 5, 7, 9, 11, 13, 15, 17], EPHEMERIS [-1]
[2026-01-21 13:05:07,584]     INFO    viperlog:  OBSERVATION_ID [0], DDI [2], STATE [14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52], FIELD [1], SCAN [3, 5, 7, 9, 11, 13, 15, 17], EPHEMERIS [-1]
[2026-01-21 13:05:07,584]     INFO    viperlog:  OBSERVATION_ID [0], DDI [3], STATE [14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52], FIELD [1], SCAN [3, 5, 7, 9, 11, 13, 15, 17], EPHEMERIS [-1]

Processing Set

from xradio.measurement_set import open_processing_set

import pandas as pd
pd.set_option('display.max_colwidth', 1000)

ps_xdt = open_processing_set(ps_store)
ps_xdt.xr_ps.summary()

	name	scan_intents	shape	execution_block_UID	polarization	scan_name	spw_name	spw_intents	field_name	source_name	line_name	field_coords	session_reference_UID	scheduling_block_UID	project_UID	start_frequency	end_frequency
0	uid___A002_Xced5df_Xf9d9.small_00	[CALIBRATE_ATMOSPHERE#OFF_SOURCE, CALIBRATE_WVR#OFF_SOURCE]	(135, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[10, 12, 14, 16, 18, 2, 4, 6, 8]	X1204293883#ALMA_RB_06#BB_1#SW-01#FULL_RES_0	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[CO_v_0_2_1(ID=3768101)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.295643e+11	2.295648e+11
1	uid___A002_Xced5df_Xf9d9.small_01	[CALIBRATE_ATMOSPHERE#OFF_SOURCE, CALIBRATE_WVR#OFF_SOURCE]	(135, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[10, 12, 14, 16, 18, 2, 4, 6, 8]	X1204293883#ALMA_RB_06#BB_2#SW-01#FULL_RES_1	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[Continuum(ID=0)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.320078e+11	2.320390e+11
2	uid___A002_Xced5df_Xf9d9.small_02	[CALIBRATE_ATMOSPHERE#OFF_SOURCE, CALIBRATE_WVR#OFF_SOURCE]	(135, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[10, 12, 14, 16, 18, 2, 4, 6, 8]	X1204293883#ALMA_RB_06#BB_3#SW-01#FULL_RES_2	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[H2CO_Continuum(ID=0)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.161367e+11	2.161406e+11
3	uid___A002_Xced5df_Xf9d9.small_03	[CALIBRATE_ATMOSPHERE#OFF_SOURCE, CALIBRATE_WVR#OFF_SOURCE]	(135, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[10, 12, 14, 16, 18, 2, 4, 6, 8]	X1204293883#ALMA_RB_06#BB_4#SW-01#FULL_RES_3	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[C18O_2_1(ID=3768339)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.179697e+11	2.179736e+11
4	uid___A002_Xced5df_Xf9d9.small_04	[CALIBRATE_ATMOSPHERE#AMBIENT, CALIBRATE_WVR#AMBIENT]	(135, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[10, 12, 14, 16, 18, 2, 4, 6, 8]	X1204293883#ALMA_RB_06#BB_1#SW-01#FULL_RES_0	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[CO_v_0_2_1(ID=3768101)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.295643e+11	2.295648e+11
5	uid___A002_Xced5df_Xf9d9.small_05	[CALIBRATE_ATMOSPHERE#AMBIENT, CALIBRATE_WVR#AMBIENT]	(135, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[10, 12, 14, 16, 18, 2, 4, 6, 8]	X1204293883#ALMA_RB_06#BB_2#SW-01#FULL_RES_1	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[Continuum(ID=0)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.320078e+11	2.320390e+11
6	uid___A002_Xced5df_Xf9d9.small_06	[CALIBRATE_ATMOSPHERE#AMBIENT, CALIBRATE_WVR#AMBIENT]	(135, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[10, 12, 14, 16, 18, 2, 4, 6, 8]	X1204293883#ALMA_RB_06#BB_3#SW-01#FULL_RES_2	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[H2CO_Continuum(ID=0)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.161367e+11	2.161406e+11
7	uid___A002_Xced5df_Xf9d9.small_07	[CALIBRATE_ATMOSPHERE#AMBIENT, CALIBRATE_WVR#AMBIENT]	(135, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[10, 12, 14, 16, 18, 2, 4, 6, 8]	X1204293883#ALMA_RB_06#BB_4#SW-01#FULL_RES_3	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[C18O_2_1(ID=3768339)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.179697e+11	2.179736e+11
8	uid___A002_Xced5df_Xf9d9.small_08	[CALIBRATE_ATMOSPHERE#HOT, CALIBRATE_WVR#HOT]	(135, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[10, 12, 14, 16, 18, 2, 4, 6, 8]	X1204293883#ALMA_RB_06#BB_1#SW-01#FULL_RES_0	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[CO_v_0_2_1(ID=3768101)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.295643e+11	2.295648e+11
9	uid___A002_Xced5df_Xf9d9.small_09	[CALIBRATE_ATMOSPHERE#HOT, CALIBRATE_WVR#HOT]	(135, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[10, 12, 14, 16, 18, 2, 4, 6, 8]	X1204293883#ALMA_RB_06#BB_2#SW-01#FULL_RES_1	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[Continuum(ID=0)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.320078e+11	2.320390e+11
10	uid___A002_Xced5df_Xf9d9.small_10	[CALIBRATE_ATMOSPHERE#HOT, CALIBRATE_WVR#HOT]	(135, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[10, 12, 14, 16, 18, 2, 4, 6, 8]	X1204293883#ALMA_RB_06#BB_3#SW-01#FULL_RES_2	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[H2CO_Continuum(ID=0)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.161367e+11	2.161406e+11
11	uid___A002_Xced5df_Xf9d9.small_11	[CALIBRATE_ATMOSPHERE#HOT, CALIBRATE_WVR#HOT]	(135, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[10, 12, 14, 16, 18, 2, 4, 6, 8]	X1204293883#ALMA_RB_06#BB_4#SW-01#FULL_RES_3	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[C18O_2_1(ID=3768339)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.179697e+11	2.179736e+11
12	uid___A002_Xced5df_Xf9d9.small_12	[OBSERVE_TARGET#OFF_SOURCE]	(2844, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[11, 13, 15, 17, 3, 5, 7, 9]	X1204293883#ALMA_RB_06#BB_1#SW-01#FULL_RES_0	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[CO_v_0_2_1(ID=3768101)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.295643e+11	2.295648e+11
13	uid___A002_Xced5df_Xf9d9.small_13	[OBSERVE_TARGET#OFF_SOURCE]	(2844, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[11, 13, 15, 17, 3, 5, 7, 9]	X1204293883#ALMA_RB_06#BB_2#SW-01#FULL_RES_1	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[Continuum(ID=0)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.320078e+11	2.320390e+11
14	uid___A002_Xced5df_Xf9d9.small_14	[OBSERVE_TARGET#OFF_SOURCE]	(2844, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[11, 13, 15, 17, 3, 5, 7, 9]	X1204293883#ALMA_RB_06#BB_3#SW-01#FULL_RES_2	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[H2CO_Continuum(ID=0)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.161367e+11	2.161406e+11
15	uid___A002_Xced5df_Xf9d9.small_15	[OBSERVE_TARGET#OFF_SOURCE]	(2844, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[11, 13, 15, 17, 3, 5, 7, 9]	X1204293883#ALMA_RB_06#BB_4#SW-01#FULL_RES_3	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[C18O_2_1(ID=3768339)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.179697e+11	2.179736e+11
16	uid___A002_Xced5df_Xf9d9.small_16	[OBSERVE_TARGET#ON_SOURCE]	(5850, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[11, 13, 15, 17, 3, 5, 7, 9]	X1204293883#ALMA_RB_06#BB_1#SW-01#FULL_RES_0	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[CO_v_0_2_1(ID=3768101)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.295643e+11	2.295648e+11
17	uid___A002_Xced5df_Xf9d9.small_17	[OBSERVE_TARGET#ON_SOURCE]	(5850, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[11, 13, 15, 17, 3, 5, 7, 9]	X1204293883#ALMA_RB_06#BB_2#SW-01#FULL_RES_1	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[Continuum(ID=0)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.320078e+11	2.320390e+11
18	uid___A002_Xced5df_Xf9d9.small_18	[OBSERVE_TARGET#ON_SOURCE]	(5850, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[11, 13, 15, 17, 3, 5, 7, 9]	X1204293883#ALMA_RB_06#BB_3#SW-01#FULL_RES_2	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[H2CO_Continuum(ID=0)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.161367e+11	2.161406e+11
19	uid___A002_Xced5df_Xf9d9.small_19	[OBSERVE_TARGET#ON_SOURCE]	(5850, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[11, 13, 15, 17, 3, 5, 7, 9]	X1204293883#ALMA_RB_06#BB_4#SW-01#FULL_RES_3	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[C18O_2_1(ID=3768339)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.179697e+11	2.179736e+11

MSv4

sub_ps_xdt = ps_xdt.xr_ps.query(scan_intents="OBSERVE_TARGET#OFF_SOURCE")
sub_ps_xdt.xr_ps.summary()

	name	scan_intents	shape	execution_block_UID	polarization	scan_name	spw_name	spw_intents	field_name	source_name	line_name	field_coords	session_reference_UID	scheduling_block_UID	project_UID	start_frequency	end_frequency
0	uid___A002_Xced5df_Xf9d9.small_12	[OBSERVE_TARGET#OFF_SOURCE]	(2844, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[11, 13, 15, 17, 3, 5, 7, 9]	X1204293883#ALMA_RB_06#BB_1#SW-01#FULL_RES_0	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[CO_v_0_2_1(ID=3768101)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.295643e+11	2.295648e+11
1	uid___A002_Xced5df_Xf9d9.small_13	[OBSERVE_TARGET#OFF_SOURCE]	(2844, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[11, 13, 15, 17, 3, 5, 7, 9]	X1204293883#ALMA_RB_06#BB_2#SW-01#FULL_RES_1	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[Continuum(ID=0)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.320078e+11	2.320390e+11
2	uid___A002_Xced5df_Xf9d9.small_14	[OBSERVE_TARGET#OFF_SOURCE]	(2844, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[11, 13, 15, 17, 3, 5, 7, 9]	X1204293883#ALMA_RB_06#BB_3#SW-01#FULL_RES_2	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[H2CO_Continuum(ID=0)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.161367e+11	2.161406e+11
3	uid___A002_Xced5df_Xf9d9.small_15	[OBSERVE_TARGET#OFF_SOURCE]	(2844, 2, 3, 2)	uid://A002/Xced5df/Xf9d9	[XX, YY]	[11, 13, 15, 17, 3, 5, 7, 9]	X1204293883#ALMA_RB_06#BB_4#SW-01#FULL_RES_3	[UNSPECIFIED]	[NGC1097_1]	[NGC1097_1]	[C18O_2_1(ID=3768339)]	[icrs, 2h46m19.09s, -30d16m30.18s]	---	uid://A001/X1284/X2621	uid://A001/X1221/Xa61	2.179697e+11	2.179736e+11

ms_xdt = sub_ps_xdt.xr_ps.query(line_name='Continuum(ID=0)').xr_ps.get_ms_xdt() # get_ms_xdt only works if a single Measurement Set is present.
ms_xdt

<xarray.DataTree 'uid___A002_Xced5df_Xf9d9.small_13'>
Group: /uid___A002_Xced5df_Xf9d9.small_13
│   Dimensions:                     (time: 2844, antenna_name: 2, frequency: 3,
│                                    polarization: 2)
│   Coordinates:
│     * time                        (time) float64 23kB 1.53e+09 ... 1.53e+09
│     * antenna_name                (antenna_name) <U9 72B 'PM01_T703' 'PM02_T701'
│     * frequency                   (frequency) float64 24B 2.32e+11 ... 2.32e+11
│     * polarization                (polarization) <U2 16B 'XX' 'YY'
│       field_name                  (time) <U29 330kB dask.array<chunksize=(1422,), meta=np.ndarray>
│       scan_name                   (time) <U21 239kB dask.array<chunksize=(2844,), meta=np.ndarray>
│       telescope_name              (antenna_name) <U4 32B dask.array<chunksize=(2,), meta=np.ndarray>
│   Data variables:
│       EFFECTIVE_INTEGRATION_TIME  (time, antenna_name) float64 46kB dask.array<chunksize=(2844, 2), meta=np.ndarray>
│       FLAG                        (time, antenna_name, frequency, polarization) bool 34kB dask.array<chunksize=(2844, 2, 3, 2), meta=np.ndarray>
│       SPECTRUM                    (time, antenna_name, frequency, polarization) float32 137kB dask.array<chunksize=(2844, 2, 3, 2), meta=np.ndarray>
│       TIME_CENTROID               (time, antenna_name) float64 46kB dask.array<chunksize=(2844, 2), meta=np.ndarray>
│       WEIGHT                      (time, antenna_name, frequency, polarization) float32 137kB dask.array<chunksize=(2844, 2, 3, 2), meta=np.ndarray>
│   Attributes:
│       creation_date:     2026-01-21T18:05:12.012836+00:00
│       creator:           {'software_name': 'xradio', 'version': '1.1.12a0'}
│       data_groups:       {'base': {'correlated_data': 'SPECTRUM', 'date': '2026...
│       observation_info:  {'execution_block_UID': 'uid://A002/Xced5df/Xf9d9', 'o...
│       processor_info:    {'sub_type': 'ALMA_ACA', 'type': 'CORRELATOR'}
│       schema_version:    4.0.0
│       type:              spectrum
├── Group: /uid___A002_Xced5df_Xf9d9.small_13/antenna_xds
│       Dimensions:                 (antenna_name: 2, cartesian_pos_label: 3,
│                                    receptor_label: 2)
│       Coordinates:
│         * cartesian_pos_label     (cartesian_pos_label) <U1 12B 'x' 'y' 'z'
│         * receptor_label          (receptor_label) <U5 40B 'pol_0' 'pol_1'
│           mount                   (antenna_name) <U6 48B dask.array<chunksize=(2,), meta=np.ndarray>
│           polarization_type       (antenna_name, receptor_label) <U1 16B dask.array<chunksize=(2, 2), meta=np.ndarray>
│           station_name            (antenna_name) <U4 32B dask.array<chunksize=(2,), meta=np.ndarray>
│           telescope_name          (antenna_name) <U4 32B dask.array<chunksize=(2,), meta=np.ndarray>
│       Data variables:
│           ANTENNA_DISH_DIAMETER   (antenna_name) float64 16B dask.array<chunksize=(2,), meta=np.ndarray>
│           ANTENNA_POSITION        (antenna_name, cartesian_pos_label) float64 48B dask.array<chunksize=(2, 3), meta=np.ndarray>
│           ANTENNA_RECEPTOR_ANGLE  (antenna_name, receptor_label) float64 32B dask.array<chunksize=(2, 2), meta=np.ndarray>
│       Attributes:
│           overall_telescope_name:  ALMA
│           relocatable_antennas:    True
│           type:                    antenna
├── Group: /uid___A002_Xced5df_Xf9d9.small_13/field_and_source_base_xds
│       Dimensions:                           (field_name: 1, sky_dir_label: 2,
│                                              line_label: 1)
│       Coordinates:
│         * field_name                        (field_name) <U29 116B 'NGC1097_1'
│         * sky_dir_label                     (sky_dir_label) <U3 24B 'ra' 'dec'
│         * line_label                        (line_label) <U21 84B '0'
│           line_name                         (field_name, line_label) <U15 60B dask.array<chunksize=(1, 1), meta=np.ndarray>
│           source_name                       (field_name) <U29 116B dask.array<chunksize=(1,), meta=np.ndarray>
│       Data variables:
│           FIELD_REFERENCE_CENTER_DIRECTION  (field_name, sky_dir_label) float64 16B dask.array<chunksize=(1, 2), meta=np.ndarray>
│           LINE_REST_FREQUENCY               (field_name, line_label) float64 8B dask.array<chunksize=(1, 1), meta=np.ndarray>
│           LINE_SYSTEMIC_VELOCITY            (field_name, line_label) float64 8B dask.array<chunksize=(1, 1), meta=np.ndarray>
│           SOURCE_DIRECTION                  (field_name, sky_dir_label) float64 16B dask.array<chunksize=(1, 2), meta=np.ndarray>
│       Attributes:
│           type:     field_and_source
├── Group: /uid___A002_Xced5df_Xf9d9.small_13/pointing_xds
│       Dimensions:                 (time_pointing: 75400, antenna_name: 2,
│                                    local_sky_dir_label: 2)
│       Coordinates:
│         * time_pointing           (time_pointing) float64 603kB 1.53e+09 ... 1.53e+09
│         * local_sky_dir_label     (local_sky_dir_label) <U3 24B 'az' 'alt'
│       Data variables:
│           POINTING_BEAM           (time_pointing, antenna_name, local_sky_dir_label) float64 2MB dask.array<chunksize=(75400, 2, 2), meta=np.ndarray>
│           POINTING_DISH_MEASURED  (time_pointing, antenna_name, local_sky_dir_label) float64 2MB dask.array<chunksize=(75400, 2, 2), meta=np.ndarray>
│           POINTING_OVER_THE_TOP   (time_pointing, antenna_name) bool 151kB dask.array<chunksize=(75400, 2), meta=np.ndarray>
│       Attributes:
│           type:     pointing
├── Group: /uid___A002_Xced5df_Xf9d9.small_13/system_calibration_xds
│       Dimensions:               (antenna_name: 2, time_system_cal: 9,
│                                  receptor_label: 2, frequency_system_cal: 128)
│       Coordinates:
│         * time_system_cal       (time_system_cal) float64 72B 1.53e+09 ... 3.623e+09
│         * receptor_label        (receptor_label) <U5 40B 'pol_0' 'pol_1'
│         * frequency_system_cal  (frequency_system_cal) int64 1kB 0 1 2 ... 125 126 127
│           antenna_id            (antenna_name) int32 8B dask.array<chunksize=(2,), meta=np.ndarray>
│           mount                 (antenna_name) <U6 48B dask.array<chunksize=(2,), meta=np.ndarray>
│           polarization_type     (antenna_name, receptor_label) <U1 16B dask.array<chunksize=(2, 2), meta=np.ndarray>
│           station_name          (antenna_name) <U4 32B dask.array<chunksize=(2,), meta=np.ndarray>
│           telescope_name        (antenna_name) <U4 32B dask.array<chunksize=(2,), meta=np.ndarray>
│       Data variables:
│           TCAL                  (antenna_name, time_system_cal, receptor_label, frequency_system_cal) float64 37kB dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>
│           TRX                   (antenna_name, time_system_cal, receptor_label, frequency_system_cal) float64 37kB dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>
│           TSKY                  (antenna_name, time_system_cal, receptor_label, frequency_system_cal) float64 37kB dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>
│           TSYS                  (antenna_name, time_system_cal, receptor_label, frequency_system_cal) float64 37kB dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>
│       Attributes:
│           type:     system_calibration
└── Group: /uid___A002_Xced5df_Xf9d9.small_13/weather_xds
        Dimensions:              (station_name: 6, time_weather: 1321,
                                  cartesian_pos_label: 3)
        Coordinates:
          * station_name         (station_name) <U10 240B 'Station_4' ... 'Station_12'
          * time_weather         (time_weather) float64 11kB 1.53e+09 ... 1.53e+09
          * cartesian_pos_label  (cartesian_pos_label) <U1 12B 'x' 'y' 'z'
        Data variables:
            DEW_POINT            (station_name, time_weather) float64 63kB dask.array<chunksize=(6, 1321), meta=np.ndarray>
            PRESSURE             (station_name, time_weather) float64 63kB dask.array<chunksize=(6, 1321), meta=np.ndarray>
            REL_HUMIDITY         (station_name, time_weather) float64 63kB dask.array<chunksize=(6, 1321), meta=np.ndarray>
            STATION_POSITION     (station_name, cartesian_pos_label) float64 144B dask.array<chunksize=(6, 3), meta=np.ndarray>
            TEMPERATURE          (station_name, time_weather) float64 63kB dask.array<chunksize=(6, 1321), meta=np.ndarray>
            WIND_DIRECTION       (station_name, time_weather) float64 63kB dask.array<chunksize=(6, 1321), meta=np.ndarray>
            WIND_SPEED           (station_name, time_weather) float64 63kB dask.array<chunksize=(6, 1321), meta=np.ndarray>
        Attributes:
            type:     weather

xarray.DataTree

'uid___A002_Xced5df_Xf9d9.small_13'

• Groups: (5)
  /uid___A002_Xced5df_Xf9d9.small_13/antenna_xds

  • Dimensions:
    • time: 2844
    • antenna_name: 2
    • frequency: 3
    • polarization: 2
    • cartesian_pos_label: 3
    • receptor_label: 2
  • Coordinates: (6)
    • cartesian_pos_label
      (cartesian_pos_label)
      <U1
      'x' 'y' 'z'

      array(['x', 'y', 'z'], dtype='<U1')

    • receptor_label
      (receptor_label)
      <U5
      'pol_0' 'pol_1'

      array(['pol_0', 'pol_1'], dtype='<U5')

    • mount
      (antenna_name)
      <U6
      dask.array<chunksize=(2,), meta=np.ndarray>

      Array Chunk Bytes 48 B 48 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type

    • polarization_type
      (antenna_name, receptor_label)
      <U1
      dask.array<chunksize=(2, 2), meta=np.ndarray>

      Array Chunk Bytes 16 B 16 B Shape (2, 2) (2, 2) Dask graph 1 chunks in 2 graph layers Data type

    • station_name
      (antenna_name)
      <U4
      dask.array<chunksize=(2,), meta=np.ndarray>

      Array Chunk Bytes 32 B 32 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type

    • telescope_name
      (antenna_name)
      <U4
      dask.array<chunksize=(2,), meta=np.ndarray>

      Array Chunk Bytes 32 B 32 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type

  • Data variables: (3)
    • ANTENNA_DISH_DIAMETER
      (antenna_name)
      float64
      dask.array<chunksize=(2,), meta=np.ndarray>

      type :

      quantity

      units :

      m

      Array Chunk Bytes 16 B 16 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • ANTENNA_POSITION
      (antenna_name, cartesian_pos_label)
      float64
      dask.array<chunksize=(2, 3), meta=np.ndarray>

      coordinate_system :

      geocentric

      frame :

      ITRS

      origin_object_name :

      earth

      type :

      location

      units :

      m

      Array Chunk Bytes 48 B 48 B Shape (2, 3) (2, 3) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • ANTENNA_RECEPTOR_ANGLE
      (antenna_name, receptor_label)
      float64
      dask.array<chunksize=(2, 2), meta=np.ndarray>

      type :

      quantity

      units :

      rad

      Array Chunk Bytes 32 B 32 B Shape (2, 2) (2, 2) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

  • Attributes: (3)

    overall_telescope_name :

    ALMA

    relocatable_antennas :

    True

    type :

    antenna

  /uid___A002_Xced5df_Xf9d9.small_13/field_and_source_base_xds

  • Dimensions:
    • time: 2844
    • antenna_name: 2
    • frequency: 3
    • polarization: 2
    • field_name: 1
    • sky_dir_label: 2
    • line_label: 1
  • Coordinates: (5)
    • field_name
      (field_name)
      <U29
      'NGC1097_1'

      array(['NGC1097_1'], dtype='<U29')

    • sky_dir_label
      (sky_dir_label)
      <U3
      'ra' 'dec'

      array(['ra', 'dec'], dtype='<U3')

    • line_label
      (line_label)
      <U21
      '0'

      array(['0'], dtype='<U21')

    • line_name
      (field_name, line_label)
      <U15
      dask.array<chunksize=(1, 1), meta=np.ndarray>

      Array Chunk Bytes 60 B 60 B Shape (1, 1) (1, 1) Dask graph 1 chunks in 2 graph layers Data type

    • source_name
      (field_name)
      <U29
      dask.array<chunksize=(1,), meta=np.ndarray>

      Array Chunk Bytes 116 B 116 B Shape (1,) (1,) Dask graph 1 chunks in 2 graph layers Data type

  • Data variables: (4)
    • FIELD_REFERENCE_CENTER_DIRECTION
      (field_name, sky_dir_label)
      float64
      dask.array<chunksize=(1, 2), meta=np.ndarray>

      frame :

      icrs

      type :

      sky_coord

      units :

      rad

      Array Chunk Bytes 16 B 16 B Shape (1, 2) (1, 2) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • LINE_REST_FREQUENCY
      (field_name, line_label)
      float64
      dask.array<chunksize=(1, 1), meta=np.ndarray>

      observer :

      lsrk

      type :

      spectral_coord

      units :

      Hz

      Array Chunk Bytes 8 B 8 B Shape (1, 1) (1, 1) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • LINE_SYSTEMIC_VELOCITY
      (field_name, line_label)
      float64
      dask.array<chunksize=(1, 1), meta=np.ndarray>

      type :

      quantity

      units :

      m/s

      Array Chunk Bytes 8 B 8 B Shape (1, 1) (1, 1) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • SOURCE_DIRECTION
      (field_name, sky_dir_label)
      float64
      dask.array<chunksize=(1, 2), meta=np.ndarray>

      frame :

      icrs

      type :

      sky_coord

      units :

      rad

      Array Chunk Bytes 16 B 16 B Shape (1, 2) (1, 2) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

  • Attributes: (1)

    type :

    field_and_source

  /uid___A002_Xced5df_Xf9d9.small_13/pointing_xds

  • Dimensions:
    • time: 2844
    • antenna_name: 2
    • frequency: 3
    • polarization: 2
    • time_pointing: 75400
    • local_sky_dir_label: 2
  • Coordinates: (2)
    • time_pointing
      (time_pointing)
      float64
      1.53e+09 1.53e+09 ... 1.53e+09

      format :

      unix

      scale :

      utc

      type :

      time

      units :

      s

      array([1.529668e+09, 1.529668e+09, 1.529668e+09, ..., 1.529672e+09,1.529672e+09, 1.529672e+09], shape=(75400,))

    • local_sky_dir_label
      (local_sky_dir_label)
      <U3
      'az' 'alt'

      array(['az', 'alt'], dtype='<U3')

  • Data variables: (3)
    • POINTING_BEAM
      (time_pointing, antenna_name, local_sky_dir_label)
      float64
      dask.array<chunksize=(75400, 2, 2), meta=np.ndarray>

      frame :

      altaz

      type :

      sky_coord

      units :

      rad

      Array Chunk Bytes 2.30 MiB 2.30 MiB Shape (75400, 2, 2) (75400, 2, 2) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • POINTING_DISH_MEASURED
      (time_pointing, antenna_name, local_sky_dir_label)
      float64
      dask.array<chunksize=(75400, 2, 2), meta=np.ndarray>

      frame :

      altaz

      type :

      sky_coord

      units :

      rad

      Array Chunk Bytes 2.30 MiB 2.30 MiB Shape (75400, 2, 2) (75400, 2, 2) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • POINTING_OVER_THE_TOP
      (time_pointing, antenna_name)
      bool
      dask.array<chunksize=(75400, 2), meta=np.ndarray>

      Array Chunk Bytes 147.27 kiB 147.27 kiB Shape (75400, 2) (75400, 2) Dask graph 1 chunks in 2 graph layers Data type bool numpy.ndarray

  • Attributes: (1)

    type :

    pointing

  /uid___A002_Xced5df_Xf9d9.small_13/system_calibration_xds

  • Dimensions:
    • time: 2844
    • antenna_name: 2
    • frequency: 3
    • polarization: 2
    • time_system_cal: 9
    • receptor_label: 2
    • frequency_system_cal: 128
  • Coordinates: (8)
    • time_system_cal
      (time_system_cal)
      float64
      1.53e+09 1.53e+09 ... 3.623e+09

      format :

      unix

      scale :

      utc

      type :

      time

      units :

      s

      array([1.529668e+09, 1.529669e+09, 1.529670e+09, 1.529670e+09, 1.529671e+09,1.529671e+09, 1.529672e+09, 1.529672e+09, 3.623164e+09])

    • receptor_label
      (receptor_label)
      <U5
      'pol_0' 'pol_1'

      array(['pol_0', 'pol_1'], dtype='<U5')

    • frequency_system_cal
      (frequency_system_cal)
      int64
      0 1 2 3 4 5 ... 123 124 125 126 127

      observer :

      TOPO

      type :

      spectral_coord

      units :

      Hz

      array([  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,  10,  11,  12,  13,14,  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,28,  29,  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  41,42,  43,  44,  45,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,56,  57,  58,  59,  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,70,  71,  72,  73,  74,  75,  76,  77,  78,  79,  80,  81,  82,  83,84,  85,  86,  87,  88,  89,  90,  91,  92,  93,  94,  95,  96,  97,98,  99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125,126, 127])

    • antenna_id
      (antenna_name)
      int32
      dask.array<chunksize=(2,), meta=np.ndarray>

      Array Chunk Bytes 8 B 8 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type int32 numpy.ndarray

    • mount
      (antenna_name)
      <U6
      dask.array<chunksize=(2,), meta=np.ndarray>

      Array Chunk Bytes 48 B 48 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type

    • polarization_type
      (antenna_name, receptor_label)
      <U1
      dask.array<chunksize=(2, 2), meta=np.ndarray>

      Array Chunk Bytes 16 B 16 B Shape (2, 2) (2, 2) Dask graph 1 chunks in 2 graph layers Data type

    • station_name
      (antenna_name)
      <U4
      dask.array<chunksize=(2,), meta=np.ndarray>

      Array Chunk Bytes 32 B 32 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type

    • telescope_name
      (antenna_name)
      <U4
      dask.array<chunksize=(2,), meta=np.ndarray>

      Array Chunk Bytes 32 B 32 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type

  • Data variables: (4)
    • TCAL
      (antenna_name, time_system_cal, receptor_label, frequency_system_cal)
      float64
      dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>

      type :

      quantity

      units :

      K

      Array Chunk Bytes 36.00 kiB 36.00 kiB Shape (2, 9, 2, 128) (2, 9, 2, 128) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • TRX
      (antenna_name, time_system_cal, receptor_label, frequency_system_cal)
      float64
      dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>

      type :

      quantity

      units :

      K

      Array Chunk Bytes 36.00 kiB 36.00 kiB Shape (2, 9, 2, 128) (2, 9, 2, 128) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • TSKY
      (antenna_name, time_system_cal, receptor_label, frequency_system_cal)
      float64
      dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>

      type :

      quantity

      units :

      K

      Array Chunk Bytes 36.00 kiB 36.00 kiB Shape (2, 9, 2, 128) (2, 9, 2, 128) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • TSYS
      (antenna_name, time_system_cal, receptor_label, frequency_system_cal)
      float64
      dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>

      type :

      quantity

      units :

      K

      Array Chunk Bytes 36.00 kiB 36.00 kiB Shape (2, 9, 2, 128) (2, 9, 2, 128) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

  • Attributes: (1)

    type :

    system_calibration

  /uid___A002_Xced5df_Xf9d9.small_13/weather_xds

  • Dimensions:
    • time: 2844
    • antenna_name: 2
    • frequency: 3
    • polarization: 2
    • station_name: 6
    • time_weather: 1321
    • cartesian_pos_label: 3
  • Coordinates: (3)
    • station_name
      (station_name)
      <U10
      'Station_4' ... 'Station_12'

      array(['Station_4', 'Station_5', 'Station_6', 'Station_10', 'Station_11','Station_12'], dtype='<U10')

    • time_weather
      (time_weather)
      float64
      1.53e+09 1.53e+09 ... 1.53e+09

      format :

      unix

      scale :

      utc

      type :

      time_weather

      units :

      s

      array([1.529668e+09, 1.529668e+09, 1.529668e+09, ..., 1.529672e+09,1.529672e+09, 1.529672e+09], shape=(1321,))

    • cartesian_pos_label
      (cartesian_pos_label)
      <U1
      'x' 'y' 'z'

      array(['x', 'y', 'z'], dtype='<U1')

  • Data variables: (7)
    • DEW_POINT
      (station_name, time_weather)
      float64
      dask.array<chunksize=(6, 1321), meta=np.ndarray>

      type :

      quantity

      units :

      K

      Array Chunk Bytes 61.92 kiB 61.92 kiB Shape (6, 1321) (6, 1321) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • PRESSURE
      (station_name, time_weather)
      float64
      dask.array<chunksize=(6, 1321), meta=np.ndarray>

      type :

      quantity

      units :

      Pa

      Array Chunk Bytes 61.92 kiB 61.92 kiB Shape (6, 1321) (6, 1321) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • REL_HUMIDITY
      (station_name, time_weather)
      float64
      dask.array<chunksize=(6, 1321), meta=np.ndarray>

      type :

      quantity

      units :

      %

      Array Chunk Bytes 61.92 kiB 61.92 kiB Shape (6, 1321) (6, 1321) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • STATION_POSITION
      (station_name, cartesian_pos_label)
      float64
      dask.array<chunksize=(6, 3), meta=np.ndarray>

      coordinate_system :

      geocentric

      frame :

      ITRS

      origin_object_name :

      earth

      type :

      location

      units :

      m

      Array Chunk Bytes 144 B 144 B Shape (6, 3) (6, 3) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • TEMPERATURE
      (station_name, time_weather)
      float64
      dask.array<chunksize=(6, 1321), meta=np.ndarray>

      type :

      quantity

      units :

      K

      Array Chunk Bytes 61.92 kiB 61.92 kiB Shape (6, 1321) (6, 1321) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • WIND_DIRECTION
      (station_name, time_weather)
      float64
      dask.array<chunksize=(6, 1321), meta=np.ndarray>

      type :

      quantity

      units :

      rad

      Array Chunk Bytes 61.92 kiB 61.92 kiB Shape (6, 1321) (6, 1321) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

    • WIND_SPEED
      (station_name, time_weather)
      float64
      dask.array<chunksize=(6, 1321), meta=np.ndarray>

      type :

      quantity

      units :

      m/s

      Array Chunk Bytes 61.92 kiB 61.92 kiB Shape (6, 1321) (6, 1321) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

  • Attributes: (1)

    type :

    weather

• Dimensions:
  • time: 2844
  • antenna_name: 2
  • frequency: 3
  • polarization: 2
• Coordinates: (7)
  • time
    (time)
    float64
    1.53e+09 1.53e+09 ... 1.53e+09

    format :

    unix

    integration_time :

    {'attrs': {'type': 'quantity', 'units': 's'}, 'data': 0.4, 'dims': []}

    scale :

    utc

    type :

    time

    units :

    s

    array([1.529668e+09, 1.529668e+09, 1.529668e+09, ..., 1.529672e+09,
           1.529672e+09, 1.529672e+09], shape=(2844,))

  • antenna_name
    (antenna_name)
    <U9
    'PM01_T703' 'PM02_T701'

    array(['PM01_T703', 'PM02_T701'], dtype='<U9')

  • frequency
    (frequency)
    float64
    2.32e+11 2.32e+11 2.32e+11

    channel_width :

    {'attrs': {'type': 'quantity', 'units': 'Hz'}, 'data': 15625000.0, 'dims': []}

    observer :

    TOPO

    reference_frequency :

    {'attrs': {'observer': 'TOPO', 'type': 'spectral_coord', 'units': 'Hz'}, 'data': 232007750385.45264, 'dims': []}

    spectral_window_intents :

    ['UNSPECIFIED']

    spectral_window_name :

    X1204293883#ALMA_RB_06#BB_2#SW-01#FULL_RES_1

    type :

    spectral_coord

    units :

    Hz

    array([2.320078e+11, 2.320234e+11, 2.320390e+11])

  • polarization
    (polarization)
    <U2
    'XX' 'YY'

    array(['XX', 'YY'], dtype='<U2')

  • field_name
    (time)
    <U29
    dask.array<chunksize=(1422,), meta=np.ndarray>

    Array Chunk Bytes 322.17 kiB 161.09 kiB Shape (2844,) (1422,) Dask graph 2 chunks in 2 graph layers Data type

  • scan_name
    (time)
    <U21
    dask.array<chunksize=(2844,), meta=np.ndarray>

    scan_intents :

    ['OBSERVE_TARGET#OFF_SOURCE']

    Array Chunk Bytes 233.30 kiB 233.30 kiB Shape (2844,) (2844,) Dask graph 1 chunks in 2 graph layers Data type

  • telescope_name
    (antenna_name)
    <U4
    dask.array<chunksize=(2,), meta=np.ndarray>

    Array Chunk Bytes 32 B 32 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type

• Data variables: (5)
  • EFFECTIVE_INTEGRATION_TIME
    (time, antenna_name)
    float64
    dask.array<chunksize=(2844, 2), meta=np.ndarray>

    type :

    quantity

    units :

    s

    Array Chunk Bytes 44.44 kiB 44.44 kiB Shape (2844, 2) (2844, 2) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

  • FLAG
    (time, antenna_name, frequency, polarization)
    bool
    dask.array<chunksize=(2844, 2, 3, 2), meta=np.ndarray>

    Array Chunk Bytes 33.33 kiB 33.33 kiB Shape (2844, 2, 3, 2) (2844, 2, 3, 2) Dask graph 1 chunks in 2 graph layers Data type bool numpy.ndarray

  • SPECTRUM
    (time, antenna_name, frequency, polarization)
    float32
    dask.array<chunksize=(2844, 2, 3, 2), meta=np.ndarray>

    units :

    Array Chunk Bytes 133.31 kiB 133.31 kiB Shape (2844, 2, 3, 2) (2844, 2, 3, 2) Dask graph 1 chunks in 2 graph layers Data type float32 numpy.ndarray

  • TIME_CENTROID
    (time, antenna_name)
    float64
    dask.array<chunksize=(2844, 2), meta=np.ndarray>

    format :

    unix

    scale :

    utc

    type :

    time

    units :

    s

    Array Chunk Bytes 44.44 kiB 44.44 kiB Shape (2844, 2) (2844, 2) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

  • WEIGHT
    (time, antenna_name, frequency, polarization)
    float32
    dask.array<chunksize=(2844, 2, 3, 2), meta=np.ndarray>

    type :

    quanta

    units :

    unkown

    Array Chunk Bytes 133.31 kiB 133.31 kiB Shape (2844, 2, 3, 2) (2844, 2, 3, 2) Dask graph 1 chunks in 2 graph layers Data type float32 numpy.ndarray

• Attributes: (7)

  creation_date :

  2026-01-21T18:05:12.012836+00:00

  creator :

  {'software_name': 'xradio', 'version': '1.1.12a0'}

  data_groups :

  {'base': {'correlated_data': 'SPECTRUM', 'date': '2026-01-21T18:05:12.103879+00:00', 'description': "Data group derived from the data column 'SPECTRUM' of an MSv2 converted to MSv4", 'field_and_source': 'field_and_source_base_xds', 'flag': 'FLAG', 'weight': 'WEIGHT'}}

  observation_info :

  {'execution_block_UID': 'uid://A002/Xced5df/Xf9d9', 'observer': ['schinnerer'], 'observing_log': "['']", 'project_UID': 'uid://A001/X1221/Xa61', 'release_date': '1858-11-17T00:00:00.000000000', 'scheduling_block_UID': 'uid://A001/X1284/X2621'}

  processor_info :

  {'sub_type': 'ALMA_ACA', 'type': 'CORRELATOR'}

  schema_version :

  4.0.0

  type :

  spectrum

Partition_info

ms_xdt.xr_ms.get_partition_info()

{'spectral_window_name': 'X1204293883#ALMA_RB_06#BB_2#SW-01#FULL_RES_1',
 'spectral_window_intents': ['UNSPECIFIED'],
 'field_name': ['NGC1097_1'],
 'polarization_setup': ['XX', 'YY'],
 'scan_name': ['11', '13', '15', '17', '3', '5', '7', '9'],
 'source_name': ['NGC1097_1'],
 'scan_intents': ['OBSERVE_TARGET#OFF_SOURCE'],
 'line_name': ['Continuum(ID=0)'],
 'data_group_name': 'base'}

Processor_info

ms_xdt.processor_info

{'sub_type': 'ALMA_ACA', 'type': 'CORRELATOR'}

Observation_info

ms_xdt.observation_info

{'execution_block_UID': 'uid://A002/Xced5df/Xf9d9',
 'observer': ['schinnerer'],
 'observing_log': "['']",
 'project_UID': 'uid://A001/X1221/Xa61',
 'release_date': '1858-11-17T00:00:00.000000000',
 'scheduling_block_UID': 'uid://A001/X1284/X2621'}

Antenna_xds

ms_xdt.antenna_xds

<xarray.DataTree 'antenna_xds'>
Group: /uid___A002_Xced5df_Xf9d9.small_13/antenna_xds
    Dimensions:                 (time: 2844, antenna_name: 2, frequency: 3,
                                 polarization: 2, cartesian_pos_label: 3,
                                 receptor_label: 2)
    Coordinates:
      * cartesian_pos_label     (cartesian_pos_label) <U1 12B 'x' 'y' 'z'
      * receptor_label          (receptor_label) <U5 40B 'pol_0' 'pol_1'
        mount                   (antenna_name) <U6 48B dask.array<chunksize=(2,), meta=np.ndarray>
        polarization_type       (antenna_name, receptor_label) <U1 16B dask.array<chunksize=(2, 2), meta=np.ndarray>
        station_name            (antenna_name) <U4 32B dask.array<chunksize=(2,), meta=np.ndarray>
        telescope_name          (antenna_name) <U4 32B dask.array<chunksize=(2,), meta=np.ndarray>
    Inherited coordinates:
      * antenna_name            (antenna_name) <U9 72B 'PM01_T703' 'PM02_T701'
      * frequency               (frequency) float64 24B 2.32e+11 2.32e+11 2.32e+11
      * polarization            (polarization) <U2 16B 'XX' 'YY'
      * time                    (time) float64 23kB 1.53e+09 1.53e+09 ... 1.53e+09
    Data variables:
        ANTENNA_DISH_DIAMETER   (antenna_name) float64 16B dask.array<chunksize=(2,), meta=np.ndarray>
        ANTENNA_POSITION        (antenna_name, cartesian_pos_label) float64 48B dask.array<chunksize=(2, 3), meta=np.ndarray>
        ANTENNA_RECEPTOR_ANGLE  (antenna_name, receptor_label) float64 32B dask.array<chunksize=(2, 2), meta=np.ndarray>
    Attributes:
        overall_telescope_name:  ALMA
        relocatable_antennas:    True
        type:                    antenna

xarray.DataTree

'antenna_xds'

• Dimensions:
  • time: 2844
  • antenna_name: 2
  • frequency: 3
  • polarization: 2
  • cartesian_pos_label: 3
  • receptor_label: 2
• Coordinates: (6)
  • cartesian_pos_label
    (cartesian_pos_label)
    <U1
    'x' 'y' 'z'

    array(['x', 'y', 'z'], dtype='<U1')

  • receptor_label
    (receptor_label)
    <U5
    'pol_0' 'pol_1'

    array(['pol_0', 'pol_1'], dtype='<U5')

  • mount
    (antenna_name)
    <U6
    dask.array<chunksize=(2,), meta=np.ndarray>

    Array Chunk Bytes 48 B 48 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type

  • polarization_type
    (antenna_name, receptor_label)
    <U1
    dask.array<chunksize=(2, 2), meta=np.ndarray>

    Array Chunk Bytes 16 B 16 B Shape (2, 2) (2, 2) Dask graph 1 chunks in 2 graph layers Data type

  • station_name
    (antenna_name)
    <U4
    dask.array<chunksize=(2,), meta=np.ndarray>

    Array Chunk Bytes 32 B 32 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type

  • telescope_name
    (antenna_name)
    <U4
    dask.array<chunksize=(2,), meta=np.ndarray>

    Array Chunk Bytes 32 B 32 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type

• Inherited coordinates: (4)
  • antenna_name
    (antenna_name)
    <U9
    'PM01_T703' 'PM02_T701'

    array(['PM01_T703', 'PM02_T701'], dtype='<U9')

  • frequency
    (frequency)
    float64
    2.32e+11 2.32e+11 2.32e+11

    channel_width :

    {'attrs': {'type': 'quantity', 'units': 'Hz'}, 'data': 15625000.0, 'dims': []}

    observer :

    TOPO

    reference_frequency :

    {'attrs': {'observer': 'TOPO', 'type': 'spectral_coord', 'units': 'Hz'}, 'data': 232007750385.45264, 'dims': []}

    spectral_window_intents :

    ['UNSPECIFIED']

    spectral_window_name :

    X1204293883#ALMA_RB_06#BB_2#SW-01#FULL_RES_1

    type :

    spectral_coord

    units :

    Hz

    array([2.320078e+11, 2.320234e+11, 2.320390e+11])

  • polarization
    (polarization)
    <U2
    'XX' 'YY'

    array(['XX', 'YY'], dtype='<U2')

  • time
    (time)
    float64
    1.53e+09 1.53e+09 ... 1.53e+09

    format :

    unix

    integration_time :

    {'attrs': {'type': 'quantity', 'units': 's'}, 'data': 0.4, 'dims': []}

    scale :

    utc

    type :

    time

    units :

    s

    array([1.529668e+09, 1.529668e+09, 1.529668e+09, ..., 1.529672e+09,
           1.529672e+09, 1.529672e+09], shape=(2844,))

• Data variables: (3)
  • ANTENNA_DISH_DIAMETER
    (antenna_name)
    float64
    dask.array<chunksize=(2,), meta=np.ndarray>

    type :

    quantity

    units :

    m

    Array Chunk Bytes 16 B 16 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

  • ANTENNA_POSITION
    (antenna_name, cartesian_pos_label)
    float64
    dask.array<chunksize=(2, 3), meta=np.ndarray>

    coordinate_system :

    geocentric

    frame :

    ITRS

    origin_object_name :

    earth

    type :

    location

    units :

    m

    Array Chunk Bytes 48 B 48 B Shape (2, 3) (2, 3) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

  • ANTENNA_RECEPTOR_ANGLE
    (antenna_name, receptor_label)
    float64
    dask.array<chunksize=(2, 2), meta=np.ndarray>

    type :

    quantity

    units :

    rad

    Array Chunk Bytes 32 B 32 B Shape (2, 2) (2, 2) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

• Attributes: (3)

  overall_telescope_name :

  ALMA

  relocatable_antennas :

  True

  type :

  antenna

Pointing_xds

pointing_xds = ms_xdt.pointing_xds
pointing_xds

<xarray.DataTree 'pointing_xds'>
Group: /uid___A002_Xced5df_Xf9d9.small_13/pointing_xds
    Dimensions:                 (time: 2844, antenna_name: 2, frequency: 3,
                                 polarization: 2, time_pointing: 75400,
                                 local_sky_dir_label: 2)
    Coordinates:
      * time_pointing           (time_pointing) float64 603kB 1.53e+09 ... 1.53e+09
      * local_sky_dir_label     (local_sky_dir_label) <U3 24B 'az' 'alt'
    Inherited coordinates:
      * antenna_name            (antenna_name) <U9 72B 'PM01_T703' 'PM02_T701'
      * frequency               (frequency) float64 24B 2.32e+11 2.32e+11 2.32e+11
      * polarization            (polarization) <U2 16B 'XX' 'YY'
      * time                    (time) float64 23kB 1.53e+09 1.53e+09 ... 1.53e+09
    Data variables:
        POINTING_BEAM           (time_pointing, antenna_name, local_sky_dir_label) float64 2MB dask.array<chunksize=(75400, 2, 2), meta=np.ndarray>
        POINTING_DISH_MEASURED  (time_pointing, antenna_name, local_sky_dir_label) float64 2MB dask.array<chunksize=(75400, 2, 2), meta=np.ndarray>
        POINTING_OVER_THE_TOP   (time_pointing, antenna_name) bool 151kB dask.array<chunksize=(75400, 2), meta=np.ndarray>
    Attributes:
        type:     pointing

xarray.DataTree

'pointing_xds'

• Dimensions:
  • time: 2844
  • antenna_name: 2
  • frequency: 3
  • polarization: 2
  • time_pointing: 75400
  • local_sky_dir_label: 2
• Coordinates: (2)
  • time_pointing
    (time_pointing)
    float64
    1.53e+09 1.53e+09 ... 1.53e+09

    format :

    unix

    scale :

    utc

    type :

    time

    units :

    s

    array([1.529668e+09, 1.529668e+09, 1.529668e+09, ..., 1.529672e+09,
           1.529672e+09, 1.529672e+09], shape=(75400,))

  • local_sky_dir_label
    (local_sky_dir_label)
    <U3
    'az' 'alt'

    array(['az', 'alt'], dtype='<U3')

• Inherited coordinates: (4)
  • antenna_name
    (antenna_name)
    <U9
    'PM01_T703' 'PM02_T701'

    array(['PM01_T703', 'PM02_T701'], dtype='<U9')

  • frequency
    (frequency)
    float64
    2.32e+11 2.32e+11 2.32e+11

    channel_width :

    {'attrs': {'type': 'quantity', 'units': 'Hz'}, 'data': 15625000.0, 'dims': []}

    observer :

    TOPO

    reference_frequency :

    {'attrs': {'observer': 'TOPO', 'type': 'spectral_coord', 'units': 'Hz'}, 'data': 232007750385.45264, 'dims': []}

    spectral_window_intents :

    ['UNSPECIFIED']

    spectral_window_name :

    X1204293883#ALMA_RB_06#BB_2#SW-01#FULL_RES_1

    type :

    spectral_coord

    units :

    Hz

    array([2.320078e+11, 2.320234e+11, 2.320390e+11])

  • polarization
    (polarization)
    <U2
    'XX' 'YY'

    array(['XX', 'YY'], dtype='<U2')

  • time
    (time)
    float64
    1.53e+09 1.53e+09 ... 1.53e+09

    format :

    unix

    integration_time :

    {'attrs': {'type': 'quantity', 'units': 's'}, 'data': 0.4, 'dims': []}

    scale :

    utc

    type :

    time

    units :

    s

    array([1.529668e+09, 1.529668e+09, 1.529668e+09, ..., 1.529672e+09,
           1.529672e+09, 1.529672e+09], shape=(2844,))

• Data variables: (3)
  • POINTING_BEAM
    (time_pointing, antenna_name, local_sky_dir_label)
    float64
    dask.array<chunksize=(75400, 2, 2), meta=np.ndarray>

    frame :

    altaz

    type :

    sky_coord

    units :

    rad

    Array Chunk Bytes 2.30 MiB 2.30 MiB Shape (75400, 2, 2) (75400, 2, 2) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

  • POINTING_DISH_MEASURED
    (time_pointing, antenna_name, local_sky_dir_label)
    float64
    dask.array<chunksize=(75400, 2, 2), meta=np.ndarray>

    frame :

    altaz

    type :

    sky_coord

    units :

    rad

    Array Chunk Bytes 2.30 MiB 2.30 MiB Shape (75400, 2, 2) (75400, 2, 2) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

  • POINTING_OVER_THE_TOP
    (time_pointing, antenna_name)
    bool
    dask.array<chunksize=(75400, 2), meta=np.ndarray>

    Array Chunk Bytes 147.27 kiB 147.27 kiB Shape (75400, 2) (75400, 2) Dask graph 1 chunks in 2 graph layers Data type bool numpy.ndarray

• Attributes: (1)

  type :

  pointing

import matplotlib.pyplot as plt

pnt_az = pointing_xds.POINTING_BEAM.sel(local_sky_dir_label='az')
pnt_alt = pointing_xds.POINTING_BEAM.sel(local_sky_dir_label='alt')

plt.figure()
plt.scatter(pnt_az, pnt_alt)
plt.show()

System Calibration

ms_xdt.system_calibration_xds

<xarray.DataTree 'system_calibration_xds'>
Group: /uid___A002_Xced5df_Xf9d9.small_13/system_calibration_xds
    Dimensions:               (time: 2844, antenna_name: 2, frequency: 3,
                               polarization: 2, time_system_cal: 9,
                               receptor_label: 2, frequency_system_cal: 128)
    Coordinates:
      * time_system_cal       (time_system_cal) float64 72B 1.53e+09 ... 3.623e+09
      * receptor_label        (receptor_label) <U5 40B 'pol_0' 'pol_1'
      * frequency_system_cal  (frequency_system_cal) int64 1kB 0 1 2 ... 125 126 127
        antenna_id            (antenna_name) int32 8B dask.array<chunksize=(2,), meta=np.ndarray>
        mount                 (antenna_name) <U6 48B dask.array<chunksize=(2,), meta=np.ndarray>
        polarization_type     (antenna_name, receptor_label) <U1 16B dask.array<chunksize=(2, 2), meta=np.ndarray>
        station_name          (antenna_name) <U4 32B dask.array<chunksize=(2,), meta=np.ndarray>
        telescope_name        (antenna_name) <U4 32B dask.array<chunksize=(2,), meta=np.ndarray>
    Inherited coordinates:
      * antenna_name          (antenna_name) <U9 72B 'PM01_T703' 'PM02_T701'
      * frequency             (frequency) float64 24B 2.32e+11 2.32e+11 2.32e+11
      * polarization          (polarization) <U2 16B 'XX' 'YY'
      * time                  (time) float64 23kB 1.53e+09 1.53e+09 ... 1.53e+09
    Data variables:
        TCAL                  (antenna_name, time_system_cal, receptor_label, frequency_system_cal) float64 37kB dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>
        TRX                   (antenna_name, time_system_cal, receptor_label, frequency_system_cal) float64 37kB dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>
        TSKY                  (antenna_name, time_system_cal, receptor_label, frequency_system_cal) float64 37kB dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>
        TSYS                  (antenna_name, time_system_cal, receptor_label, frequency_system_cal) float64 37kB dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>
    Attributes:
        type:     system_calibration

xarray.DataTree

'system_calibration_xds'

• Dimensions:
  • time: 2844
  • antenna_name: 2
  • frequency: 3
  • polarization: 2
  • time_system_cal: 9
  • receptor_label: 2
  • frequency_system_cal: 128
• Coordinates: (8)
  • time_system_cal
    (time_system_cal)
    float64
    1.53e+09 1.53e+09 ... 3.623e+09

    format :

    unix

    scale :

    utc

    type :

    time

    units :

    s

    array([1.529668e+09, 1.529669e+09, 1.529670e+09, 1.529670e+09, 1.529671e+09,
           1.529671e+09, 1.529672e+09, 1.529672e+09, 3.623164e+09])

  • receptor_label
    (receptor_label)
    <U5
    'pol_0' 'pol_1'

    array(['pol_0', 'pol_1'], dtype='<U5')

  • frequency_system_cal
    (frequency_system_cal)
    int64
    0 1 2 3 4 5 ... 123 124 125 126 127

    observer :

    TOPO

    type :

    spectral_coord

    units :

    Hz

    array([  0,   1,   2,   3,   4,   5,   6,   7,   8,   9,  10,  11,  12,  13,
            14,  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,
            28,  29,  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  41,
            42,  43,  44,  45,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,
            56,  57,  58,  59,  60,  61,  62,  63,  64,  65,  66,  67,  68,  69,
            70,  71,  72,  73,  74,  75,  76,  77,  78,  79,  80,  81,  82,  83,
            84,  85,  86,  87,  88,  89,  90,  91,  92,  93,  94,  95,  96,  97,
            98,  99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
           112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125,
           126, 127])

  • antenna_id
    (antenna_name)
    int32
    dask.array<chunksize=(2,), meta=np.ndarray>

    Array Chunk Bytes 8 B 8 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type int32 numpy.ndarray

  • mount
    (antenna_name)
    <U6
    dask.array<chunksize=(2,), meta=np.ndarray>

    Array Chunk Bytes 48 B 48 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type

  • polarization_type
    (antenna_name, receptor_label)
    <U1
    dask.array<chunksize=(2, 2), meta=np.ndarray>

    Array Chunk Bytes 16 B 16 B Shape (2, 2) (2, 2) Dask graph 1 chunks in 2 graph layers Data type

  • station_name
    (antenna_name)
    <U4
    dask.array<chunksize=(2,), meta=np.ndarray>

    Array Chunk Bytes 32 B 32 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type

  • telescope_name
    (antenna_name)
    <U4
    dask.array<chunksize=(2,), meta=np.ndarray>

    Array Chunk Bytes 32 B 32 B Shape (2,) (2,) Dask graph 1 chunks in 2 graph layers Data type

• Inherited coordinates: (4)
  • antenna_name
    (antenna_name)
    <U9
    'PM01_T703' 'PM02_T701'

    array(['PM01_T703', 'PM02_T701'], dtype='<U9')

  • frequency
    (frequency)
    float64
    2.32e+11 2.32e+11 2.32e+11

    channel_width :

    {'attrs': {'type': 'quantity', 'units': 'Hz'}, 'data': 15625000.0, 'dims': []}

    observer :

    TOPO

    reference_frequency :

    {'attrs': {'observer': 'TOPO', 'type': 'spectral_coord', 'units': 'Hz'}, 'data': 232007750385.45264, 'dims': []}

    spectral_window_intents :

    ['UNSPECIFIED']

    spectral_window_name :

    X1204293883#ALMA_RB_06#BB_2#SW-01#FULL_RES_1

    type :

    spectral_coord

    units :

    Hz

    array([2.320078e+11, 2.320234e+11, 2.320390e+11])

  • polarization
    (polarization)
    <U2
    'XX' 'YY'

    array(['XX', 'YY'], dtype='<U2')

  • time
    (time)
    float64
    1.53e+09 1.53e+09 ... 1.53e+09

    format :

    unix

    integration_time :

    {'attrs': {'type': 'quantity', 'units': 's'}, 'data': 0.4, 'dims': []}

    scale :

    utc

    type :

    time

    units :

    s

    array([1.529668e+09, 1.529668e+09, 1.529668e+09, ..., 1.529672e+09,
           1.529672e+09, 1.529672e+09], shape=(2844,))

• Data variables: (4)
  • TCAL
    (antenna_name, time_system_cal, receptor_label, frequency_system_cal)
    float64
    dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>

    type :

    quantity

    units :

    K

    Array Chunk Bytes 36.00 kiB 36.00 kiB Shape (2, 9, 2, 128) (2, 9, 2, 128) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

  • TRX
    (antenna_name, time_system_cal, receptor_label, frequency_system_cal)
    float64
    dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>

    type :

    quantity

    units :

    K

    Array Chunk Bytes 36.00 kiB 36.00 kiB Shape (2, 9, 2, 128) (2, 9, 2, 128) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

  • TSKY
    (antenna_name, time_system_cal, receptor_label, frequency_system_cal)
    float64
    dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>

    type :

    quantity

    units :

    K

    Array Chunk Bytes 36.00 kiB 36.00 kiB Shape (2, 9, 2, 128) (2, 9, 2, 128) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

  • TSYS
    (antenna_name, time_system_cal, receptor_label, frequency_system_cal)
    float64
    dask.array<chunksize=(2, 9, 2, 128), meta=np.ndarray>

    type :

    quantity

    units :

    K

    Array Chunk Bytes 36.00 kiB 36.00 kiB Shape (2, 9, 2, 128) (2, 9, 2, 128) Dask graph 1 chunks in 2 graph layers Data type float64 numpy.ndarray

• Attributes: (1)

  type :

  system_calibration