visibility_bin

Module containing class for visibility data binned by subgrid configuration.

class ska_sdp_distributed_self_cal_prototype.data_managers.visibility_bin.VisibilityBin(subgrid_config: SubgridConfig, vis_data: dask.array.Array | numpy.ndarray, uvw_data: dask.array.Array, channel_count: int, start_channels: dask.array.Array, end_channels: dask.array.Array)[source]

Bases: object

Visibility data binned by subgrid configuration.

subgrid_config: SubgridConfig object containing configuration for the subgrid.

obs_vis: An array of unrolled observed visibilities.

res_vis: An array of unrolled residual visibilities (initialised to observed visibilities, updated by subracting model visibilities at the end of each major cycle).

uvw: An array of unrolled uvw values.

channel_count: Number of channels.

start_channels: An array of start channels required for (de)gridding.

end_channels: An array of end channels required for (de)gridding.

degridding_task: Holds a dask.delayed task for degridding.

update_residual_visibilities(model_vis: numpy.ndarray) → None[source]

Subtract model visibilities from original (observed) visibilities.

Parameters:: model_vis – An array of the model visibilities to subtract.
Returns:: None