PhysicsSphericalDifferential#

class astropy.coordinates.PhysicsSphericalDifferential(d_phi, d_theta=None, d_r=None, copy=True)[source]#

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

Parameters:

d_phi, d_thetaQuantity: The differential azimuth and inclination.
d_rQuantity: The differential radial distance.
copybool, optional: If True (default), arrays will be copied. If False, arrays will be references, though possibly broadcast to ensure matching shapes.

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:

representationBaseRepresentation 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.

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_classBaseRepresentation 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.