low_comm_tools.sdp.utils

Attributes

msg

Classes

MetaData

Functions

`phase`(→ numpy.floating[Any])
`pre_calculate_metadata`(→ MetaData)
`radec_to_xyz`(→ numpy.typing.NDArray[numpy.floating[Any]])	Convert RA and Dec ICRS coordinates to ITRS cartesian coordinates.

Module Contents

class low_comm_tools.sdp.utils.MetaData[source]

Bases: NamedTuple

ant1: numpy.typing.NDArray[numpy.integer[Any]][source]

ant2: numpy.typing.NDArray[numpy.integer[Any]][source]

beam_itrf: numpy.typing.NDArray[numpy.floating[Any]][source]

cos_term: numpy.typing.NDArray[numpy.floating[Any]][source]

location: astropy.coordinates.EarthLocation[source]

mjds: numpy.typing.NDArray[numpy.floating[Any]][source]

nstation: int[source]

stations: list[str][source]

telescope: everybeam.Telescope[source]

time: astropy.time.Time[source]

zen_itrf: numpy.typing.NDArray[numpy.floating[Any]][source]

low_comm_tools.sdp.utils.phase(z: numpy.complexfloating[Any, Any]) → numpy.floating[Any][source]

low_comm_tools.sdp.utils.pre_calculate_metadata(dataset: pathlib.Path, vis: ska_sdp_datamodels.visibility.Visibility) → MetaData[source]

low_comm_tools.sdp.utils.radec_to_xyz(ra: astropy.coordinates.Angle, dec: astropy.coordinates.Angle, mjds: numpy.typing.NDArray[numpy.floating[Any]]) → numpy.typing.NDArray[numpy.floating[Any]][source]

Convert RA and Dec ICRS coordinates to ITRS cartesian coordinates. See the Everybeam docs.

Parameters:

ra (astropy.coordinates.Angle) – Right ascension
dec (astropy.coordinates.Angle) – Declination
mjds (float) – MJD time in seconds

Returns:

NumPy array containing the ITRS X, Y and Z coordinates

Return type:

pointing_xyz (ndarray)

low_comm_tools.sdp.utils.msg = 'SKA-SDP tools are required. Install with [ska-sdp] pip extra'[source]