UnitSphericalDifferential¶

class
astropy.coordinates.
UnitSphericalDifferential
(d_lon, d_lat, copy=True)[source]¶ Bases:
astropy.coordinates.BaseSphericalDifferential
Differential(s) of points on a unit sphere.
Parameters: Attributes Summary
attr_classes
d_lat
Component ‘d_lat’ of the Differential. d_lon
Component ‘d_lon’ of the Differential. Methods Summary
from_representation
(representation[, base])Create a new instance of this representation from another one. represent_as
(self, other_class[, base])Convert coordinates to another representation. to_cartesian
(self, base)Convert the differential to 3D rectangular cartesian coordinates. Attributes Documentation

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

d_lat
¶ Component ‘d_lat’ of the Differential.

d_lon
¶ Component ‘d_lon’ of the Differential.
Methods Documentation

classmethod
from_representation
(representation, base=None)[source]¶ 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.
 representation :

represent_as
(self, other_class, base=None)[source]¶ 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
.
 other_class :

to_cartesian
(self, base)[source]¶ 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
 base : instance of
