chan_selection_to_frequencies

chan_selection_to_frequencies(img, selection, unit='GHz')

Convert channel selection to frequency tuples for a given CASA cube.

Parameters:

• img (str) -- CASA cube name

• selection (str) -- Channel selection string using CASA selection syntax

• unit (str) -- Frequency unit

Returns:

List of pairs of frequency values (float) in the desired units

Return type:

list[float] | list[str]