low_comm_tools.ms_utils

Attributes

`ComplexArray`
`FloatArray`
`IntArray`

Classes

Antennas

Functions

`_as_path`(→ pathlib.Path)
`_fix_field_name`(→ str)
`get_altaz_from_ms`(→ astropy.coordinates.SkyCoord)
`get_antenna_index_from_name`(→ int)
`get_antenna_name_from_index`(→ str)
`get_antenna_names_from_ms`(→ list[str])
`get_antennas_from_ms`(→ Antennas)
`get_baseline_length`(...)	Get the length of a baseline.
`get_columns_from_ms`(→ list[str])
`get_coord_from_ms`(→ astropy.coordinates.SkyCoord)
`get_field_name_from_ms`(→ str)
`get_freq_from_ms`(...)
`get_interval_from_ms`(...)
`get_location_from_ms`(→ astropy.coordinates.EarthLocation)
`get_scan_numbers_from_ms`(→ IntArray)
`get_telescope_name_from_ms`(→ str)
`get_time_from_ms`(→ astropy.time.Time)
`get_time_from_table`(→ astropy.time.Time)	Get time from OPEN casacore tyable
`get_weight_from_ms`(→ FloatArray)
`rename_telescope`(→ pathlib.Path)	Rename TELESCOPE column
`update_ms_with_subtable`(→ pathlib.Path)	Add subtable to metadata

Module Contents

class low_comm_tools.ms_utils.Antennas[source]

Bases: NamedTuple

ant_1s: numpy.typing.NDArray[numpy.integer[Any]][source]

ant_2s: numpy.typing.NDArray[numpy.integer[Any]][source]

low_comm_tools.ms_utils._as_path(p: str | pathlib.Path) → pathlib.Path[source]

low_comm_tools.ms_utils._fix_field_name(field_name: str) → str[source]

low_comm_tools.ms_utils.get_altaz_from_ms(ms_path: str | pathlib.Path, field_index: int = 0) → astropy.coordinates.SkyCoord[source]

low_comm_tools.ms_utils.get_antenna_index_from_name(ms_path: str | pathlib.Path, name: str) → int[source]

low_comm_tools.ms_utils.get_antenna_name_from_index(ms_path: str | pathlib.Path, idx: int) → str[source]

low_comm_tools.ms_utils.get_antenna_names_from_ms(ms_path: str | pathlib.Path) → list[str][source]

low_comm_tools.ms_utils.get_antennas_from_ms(ms_path: str | pathlib.Path) → Antennas[source]

low_comm_tools.ms_utils.get_baseline_length(ms_path: pathlib.Path | str, ant_1: int, ant_2: int) → astropy.units.Quantity[astropy.units.m][source]

Get the length of a baseline.

Parameters:

ms_path (Path | str) – Path to MS
ant_1 (int) – Antenna 1 index
ant_2 (int) – Antenna 2 index

Returns:

Baseline length in metres

Return type:

u.Quantity[u.m]

low_comm_tools.ms_utils.get_columns_from_ms(ms_path: str | pathlib.Path) → list[str][source]

low_comm_tools.ms_utils.get_coord_from_ms(ms_path: str | pathlib.Path, field_index: int = 0) → astropy.coordinates.SkyCoord[source]

low_comm_tools.ms_utils.get_field_name_from_ms(ms_path: str | pathlib.Path, field_index: int = 0) → str[source]

low_comm_tools.ms_utils.get_freq_from_ms(ms_path: str | pathlib.Path) → astropy.units.Quantity[astropy.units.Hz][source]

low_comm_tools.ms_utils.get_interval_from_ms(ms_path: pathlib.Path | str) → astropy.units.Quantity[astropy.units.s][source]

low_comm_tools.ms_utils.get_location_from_ms(ms_path: str | pathlib.Path) → astropy.coordinates.EarthLocation[source]

low_comm_tools.ms_utils.get_scan_numbers_from_ms(ms_path: pathlib.Path | str) → IntArray[source]

low_comm_tools.ms_utils.get_telescope_name_from_ms(ms_path: pathlib.Path | str) → str[source]

low_comm_tools.ms_utils.get_time_from_ms(ms_path: str | pathlib.Path, use_centroid: bool = True) → astropy.time.Time[source]

low_comm_tools.ms_utils.get_time_from_table(tab: casacore.tables.table, use_centroid: bool = True) → astropy.time.Time[source]

Get time from OPEN casacore tyable

Parameters:: tab (table) – OPEN table
Returns:: Times
Return type:: Time

low_comm_tools.ms_utils.get_weight_from_ms(ms_path: pathlib.Path | str, spectrum: bool = True) → FloatArray[source]

low_comm_tools.ms_utils.rename_telescope(ms_path: pathlib.Path, telescope_name: str = 'SKA-LOW') → pathlib.Path[source]

Rename TELESCOPE column

Parameters:

ms_path (Path) – Path to MS
telescope_name (str, optional) – New telescope name. Defaults to “SKA-LOW”.

Returns:

Updated MS path

Return type:

Path

low_comm_tools.ms_utils.update_ms_with_subtable(ms_path: pathlib.Path, subtable_path: pathlib.Path, dry_run: bool = False) → pathlib.Path[source]

Add subtable to metadata

Parameters:

ms_path (Path) – Path to MS
subtable_path (Path) – Path to subtable
dry_run (bool, optional) – Don’t apply update. Defaults to False.

Returns:

Updated MS

Return type:

Path

type low_comm_tools.ms_utils.ComplexArray = npt.NDArray[np.complexfloating[Any, Any]][source]

type low_comm_tools.ms_utils.FloatArray = npt.NDArray[np.floating[Any]][source]

type low_comm_tools.ms_utils.IntArray = npt.NDArray[np.int64][source]