Source code for astropy.coordinates.builtin_frames.itrs

# -*- coding: utf-8 -*-
# Licensed under a 3-clause BSD style license - see LICENSE.rst

from astropy.utils.decorators import format_doc
from astropy.coordinates.representation import CartesianRepresentation, CartesianDifferential
from astropy.coordinates.baseframe import BaseCoordinateFrame, base_doc
from astropy.coordinates.attributes import TimeAttribute
from .utils import DEFAULT_OBSTIME

__all__ = ['ITRS']


[docs]@format_doc(base_doc, components="", footer="") class ITRS(BaseCoordinateFrame): """ A coordinate or frame in the International Terrestrial Reference System (ITRS). This is approximately a geocentric system, although strictly it is defined by a series of reference locations near the surface of the Earth. For more background on the ITRS, see the references provided in the :ref:`astropy:astropy-coordinates-seealso` section of the documentation. """ default_representation = CartesianRepresentation default_differential = CartesianDifferential obstime = TimeAttribute(default=DEFAULT_OBSTIME) @property def earth_location(self): """ The data in this frame as an `~astropy.coordinates.EarthLocation` class. """ from astropy.coordinates.earth import EarthLocation cart = self.represent_as(CartesianRepresentation) return EarthLocation(x=cart.x, y=cart.y, z=cart.z)
# Self-transform is in intermediate_rotation_transforms.py with all the other # ITRS transforms