RotateCelestial2Native

class astropy.modeling.rotations.RotateCelestial2Native(lon, lat, lon_pole, **kwargs)

Bases: _SkyRotation

Transform from Celestial to Native Spherical Coordinates.

Parameters:

lonfloat or Quantity [:ref: ‘angle’]

Celestial longitude of the fiducial point.

latfloat or Quantity [:ref: ‘angle’]

Celestial latitude of the fiducial point.

lon_polefloat or Quantity [:ref: ‘angle’]

Longitude of the celestial pole in the native system.

Notes

If lon, lat and lon_pole are numerical values they should be in units of deg. Inputs are angles on the celestial sphere. Outputs are angles on the native sphere.

Attributes Summary

input_units	Input units.
n_inputs	The number of inputs.
n_outputs	The number of outputs.
return_units	Output units.

Methods Summary

__call__(*inputs[, model_set_axis, ...])	Evaluate this model using the given input(s) and the parameter values that were specified when the model was instantiated.
evaluate(alpha_C, delta_C, lon, lat, lon_pole)	Parameters:

Attributes Documentation

input_units

Input units.

n_inputs = 2

The number of inputs.

n_outputs = 2

The number of outputs.

return_units

Output units.

Methods Documentation

__call__(*inputs, model_set_axis=None, with_bounding_box=False, fill_value=nan, equivalencies=None, inputs_map=None, **new_inputs)

Evaluate this model using the given input(s) and the parameter values that were specified when the model was instantiated.

evaluate(alpha_C, delta_C, lon, lat, lon_pole)

Parameters:

alpha_C, delta_Cfloat or Quantity [:ref: ‘angle’]

Angles in the Celestial coordinate frame. If float, assumed in degrees.

lon, lat, lon_polefloat or Quantity [:ref: ‘angle’]

Parameter values when the model was initialized. If float, assumed in degrees.

Returns:

phi_N, theta_Nfloat or Quantity [:ref: ‘angle’]

Angles on the Native sphere. If float, in degrees.