orca.utils.vis_sub

Visibility subtraction utilities.

Provides functions for computing difference between visibility datasets, useful for transient detection and background subtraction.

Note

This module is experimental and not fully tested.

Attributes

parser

Functions

diff(early_vis, late_vis, out_vis)

Compute difference between two visibility files.

Module Contents

orca.utils.vis_sub.diff(early_vis: str, late_vis: str, out_vis: str)[source]

Compute difference between two visibility files.

Subtracts early_vis from late_vis and writes to out_vis. Output metadata (including uvw) comes from early_vis.

Parameters:

  • early_vis – Path to the earlier visibility file.

  • late_vis – Path to the later visibility file.

  • out_vis – Path for the output difference visibility file.

Raises:

AssertionError – If the visibility files have different antenna ordering.

orca.utils.vis_sub.parser[source]