TEME

class astropy.coordinates.TEME(*args, copy=True, representation_type=None, differential_type=None, **kwargs)[source]

Bases: astropy.coordinates.BaseCoordinateFrame

A coordinate or frame in the True Equator Mean Equinox frame (TEME).

This frame is a geocentric system similar to CIRS or geocentric apparent place, except that the mean sidereal time is used to rotate from TIRS. TEME coordinates are most often used in combination with orbital data for satellites in the two-line-ephemeris format.

Different implementations of the TEME frame exist. For clarity, this frame follows the conventions and relations to other frames that are set out in Vallado et al (2006).

For more background on TEME, see the references provided in the See Also section of the documentation.

Parameters
dataBaseRepresentation subclass instance

A representation object or None to have no data (or use the coordinate component arguments, see below).

representation_typeBaseRepresentation subclass, str, optional

A representation class or string name of a representation class. This sets the expected input representation class, thereby changing the expected keyword arguments for the data passed in. For example, passing representation_type='cartesian' will make the classes expect position data with cartesian names, i.e. x, y, z in most cases unless overridden via frame_specific_representation_info. To see this frame’s names, check out <this frame>().representation_info.

differential_typeBaseDifferential subclass, str, dict, optional

A differential class or dictionary of differential classes (currently only a velocity differential with key ‘s’ is supported). This sets the expected input differential class, thereby changing the expected keyword arguments of the data passed in. For example, passing differential_type='cartesian' will make the classes expect velocity data with the argument names v_x, v_y, v_z unless overridden via frame_specific_representation_info. To see this frame’s names, check out <this frame>().representation_info.

copybool, optional

If True (default), make copies of the input coordinate arrays. Can only be passed in as a keyword argument.

Other Parameters
obstimeTime

The time at which the frame is defined. Used for determining the position of the Earth.

Attributes Summary

default_differential

Default representation for differential data (e.g., velocity)

default_representation

Default representation for position data

frame_attributes

frame_specific_representation_info

Mapping for frame-specific component names

name

obstime

Attributes Documentation

default_differential

Default representation for differential data (e.g., velocity)

default_representation

Default representation for position data

frame_attributes = {'obstime': <astropy.coordinates.attributes.TimeAttribute object>}
frame_specific_representation_info

Mapping for frame-specific component names

name = 'teme'
obstime = None