ska_tmc_dishleafnode.az_el_converter module

Link to the TMC User documentation is here <https://confluence.skatelescope.org/display/UD/TMC+User+Documentation>_.

AzElConverter: This module defines the AzElConverter class, which is used to convert given Ra and Dec values into AzEl.

class ska_tmc_dishleafnode.az_el_converter.AzElConverter(component_manager)

Bases: object

Class to convert Right ascension(Ra) and Declination(Dec) values into Azimuth(Az) and Elevation(El).

apply_refraction_correction(azel: astropy.coordinates.AltAz) → List[float]

Apply refraction correction on given AzEl.

azel_to_radec(az_value: float, el_value: float, timestamp: str) → List[Union[str, Any]]

Convert Az/El (deg) to RA/Dec (HMS/DMS), reversing refraction.

create_antenna_obj() → None

Create antenna object from array layout and set observer.

point(right_ascension: str | float, declination: str | float, timestamp: str) → list[float]

Convert RA/Dec to Az/El and apply refraction.

Parameters:

  • right_ascension – RA value (H:M:S string or float degrees )

  • declination – Dec value (D:M:S string or float degrees per )

  • timestamp – UTC timestamp string

Returns:

[Az deg, El deg]

point_to_body(target_name: str, timestamp: str) → List[float]

Get Az/El for a non-sidereal object and apply refraction correction.

Parameters:

  • target_name – Name of the non-sidereal body

  • timestamp – Timestamp for observation

radec_to_azel(right_ascension: str | float, declination: str | float, timestamp: str) → List[float]

Forward transform RA/Dec to Az/El and apply refraction.

Parameters:

  • right_ascension – RA value (H:M:S string or float degrees)

  • declination – Dec value (D:M:S string or float degrees)

  • timestamp – UTC timestamp string

Returns:

[Az deg, El deg]

class ska_tmc_dishleafnode.az_el_converter.AzElConverter_v2(component_manager)

Bases: AzElConverter

Class to convert ICRS, special, TLE, altaz, etc reference frame values into Azimuth(Az) and Elevation(El). This class addressed the missing projection and trajectory functionality in older class.

get_offset_in_rad(x: float, y: float) → tuple

Get the offset in radian

Parameters:

  • x – Offset in arcseconds along x-axis.

  • y – Offset in arcseconds along y-axis.

Returns:

Offset values in radians.

Return type:

tuple[float, float]

point(right_ascension: Optional[Union[str, float]] = None, declination: Optional[Union[str, float]] = None, timestamp: Optional[str] = None) → List[float]

Get Az, El and apply refraction correction.

Parameters:

timestamp – Timestamp for observation.

Returns:

Azimuth and Elevation in degrees after refraction correction.

Return type:

List[float]