astrohack.extract_pointing

Functions

extract_pointing(...)

Extract pointing data from measurement set. Creates holography output file.

Module Contents

extract_pointing(ms_name: str, point_name: str | None = None, parallel: bool = False, overwrite: bool = False) → astrohack.io.point_mds.AstrohackPointFile | None[source]

Extract pointing data from measurement set. Creates holography output file.

Parameters:

  • ms_name (str) – Name of input measurement file name.

  • point_name (str, optional) – Name of <point_name>.point.zarr file to create. Defaults to measurement set name with point.zarr extension.

  • parallel (bool, optional) – Boolean for whether to process in parallel. Defaults to False

  • overwrite (bool, optional) – Overwrite pointing file on disk, defaults to False

Returns:

Holography point object.

Return type:

AstrohackPointFile

Example Usage In this case, the pointing_name is the file name to be created after extraction.

from astrohack.extract_pointing import extract_pointing

extract_pointing(
    ms_name="astrohack_observation.ms",
    point_name="astrohack_observation.point.zarr"
)

AstrohackPointFile

Point object allows the user to access point data via dictionary keys with values ant. The point object also provides a summary() helper function to list available keys for each file.