PhysicsSphericalDifferential¶

class astropy.coordinates.PhysicsSphericalDifferential(d_phi, d_theta, d_r, copy=True)[source]¶

Differential(s) of 3D spherical coordinates using physics convention.

Parameters:	d_phi, d_theta : `Quantity` The differential azimuth and inclination. d_r : `Quantity` The differential radial distance. copy : bool, optional If `True` (default), arrays will be copied rather than referenced.

Attributes Summary

`attr_classes`
`d_phi`	Component ‘d_phi’ of the Differential.
`d_r`	Component ‘d_r’ of the Differential.
`d_theta`	Component ‘d_theta’ 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.

Attributes Documentation

attr_classes = {'d_phi': <class 'astropy.units.quantity.Quantity'>, 'd_r': <class 'astropy.units.quantity.Quantity'>, 'd_theta': <class 'astropy.units.quantity.Quantity'>}¶

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.

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. 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`.