pipeline.domain.datadescription.DataDescription

class DataDescription(dd_id: int, spw: SpectralWindow, pol_id: int)[source]

Bases: object

A logical representation of an entry in the DATA_DESCRIPTION table.

The DATA_DESCRIPTION table in the measurement set defines the shape of the data in the MAIN table.

spw: SpectralWindow object for the spectral window ID associated with the data description.

obs_time: Mean of midpoint observation times for data matching the data description.

chan_freq: List of channel centre frequencies for data matching the data description.

corr_axis: Vector containing polarization labels that were correlated together for data matching the data description.

Methods

`get_polarization_id`	Get the polarization ID associated with given polarization label.
`get_polarization_label`	Get the polarization label associated with given polarization ID.

Attributes

`num_polarizations`	Return number of polarizations in the DataDescription.
`polarizations`	Return polarizations in the DataDescription.

__init__(dd_id: int, spw: SpectralWindow, pol_id: int) → None[source]

Initialize a DataDescription object.

Parameters:

dd_id -- Numerical identifier of the data description.
spw -- SpectralWindow object for spectral window ID associated with the data description.
pol_id -- Polarization ID associated with the data description.

static get_polarization_id(pol: str) → int[source]

Get the polarization ID associated with given polarization label.

get_polarization_label(pol_id: int) → str[source]

Get the polarization label associated with given polarization ID. This converts an integer to a string, eg. 0 -> 'XX'.

property num_polarizations: int: Return number of polarizations in the DataDescription.

property polarizations: list[str]

Return polarizations in the DataDescription.