Gain Files
This page details how users can access QuartiCal’s gain solutions. By default,
QuartiCal places all its gain outputs in a folder called gains.qc
. This
folder (or the folder chosen using output.gain_directory
) will contain all
the gain solutions. These gain solutions are stored as xarray.Datasets
backed by zarr arrays and include gain flags and coordinate information.
Note
The remainder of this section assumes you have a working installation of dask-ms.
Reading Gains
Under the assumption that QuartiCal has been run using the defaults (solving
for G
with output.gain_directory=gains.qc
) the gains can be read using
the following:
from daskms.experimental.zarr import xds_from_zarr
gains = xds_from_zarr("gains.qc::G")
This will produce a list of xarray.Dataset
objects (the length of the
list will depend on how the data was partitioned during the solve). Users are
then free to manipulate these xarray.Datasets
as normal.
Warning
QuartiCal outputs include some experimental features such as the inclusion
of jhj
- the product of the conjugate transpose of the Jacobian and the
Jacobian. Users are discouraged from relying on this information as it is
experimental and may change in a future release.