UnitSphericalDifferential¶

class
astropy.coordinates.
UnitSphericalDifferential
(d_lon, d_lat=None, copy=True)[source]¶ Bases:
astropy.coordinates.BaseSphericalDifferential
Differential(s) of points on a unit sphere.
 Parameters
 d_lon, d_lat
Quantity
The longitude and latitude of the differentials.
 copybool, optional
If
True
(default), arrays will be copied. IfFalse
, arrays will be references, though possibly broadcast to ensure matching shapes.
 d_lon, d_lat
Attributes Summary
Component ‘d_lat’ of the Differential.
Component ‘d_lon’ 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': <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.
 baseinstance 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
(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.
 baseinstance of
self.base_representation
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
(base)[source]¶ Convert the differential to 3D rectangular cartesian coordinates.
 Parameters
 baseinstance 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.
 baseinstance of
 Returns
 This object as a
CartesianDifferential
 This object as a