UnitSphericalCosLatDifferential¶

class astropy.coordinates.UnitSphericalCosLatDifferential(d_lon_coslat, d_lat, copy=True)[source] [edit on github]¶

Differential(s) of points on a unit sphere.

Parameters:	d_lon_coslat, d_lat : `Quantity` The longitude and latitude of the differentials. copy : bool, optional If `True` (default), arrays will be copied rather than referenced.

Attributes Summary

`attr_classes`
`d_lat`	Component ‘d_lat’ of the Differential.
`d_lon_coslat`	Component ‘d_lon_coslat’ of the Differential.

Methods Summary

`from_representation`(representation[, base])	Create a new instance of this representation from another one.
`represent_as`(other_class[, base])	Convert coordinates to another representation.
`to_cartesian`(base)	Convert the differential to 3D rectangular cartesian coordinates.

Attributes Documentation

attr_classes = {'d_lat': <class 'astropy.units.quantity.Quantity'>, 'd_lon_coslat': <class 'astropy.units.quantity.Quantity'>}¶

Methods Documentation

classmethod from_representation(representation, base=None)[source] [edit on github]¶

Create a new instance of this representation from another one.

Parameters:	representation : `BaseRepresentation` instance The presentation that should be converted to this class. base : instance of `cls.base_representation` The base relative to which the differentials will be defined. If the representation is a differential itself, the base will be converted to its `base_representation` to help convert it.

represent_as(other_class, base=None)[source] [edit on github]¶

Convert coordinates to another representation.

If the instance is of the requested class, it is returned unmodified. By default, conversion is done via cartesian coordinates.

Parameters:	other_class : `BaseRepresentation` subclass The type of representation to turn the coordinates into. base : instance of `self.base_representation`, optional Base relative to which the differentials are defined. If the other class is a differential representation, the base will be converted to its `base_representation`.

Convert the differential to 3D rectangular cartesian coordinates.

Parameters:	base : instance of `self.base_representation` The points for which the differentials are to be converted: each of the components is multiplied by its unit vectors and scale factors.
Returns:	This object as a `CartesianDifferential`