RotateCelestial2Native

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

Bases: astropy.modeling.rotations._SkyRotation

Transform from Celestial to Native Spherical Coordinates.

Parameters
lonfloat or or Quantity

Celestial longitude of the fiducial point.

latfloat or or Quantity

Celestial latitude of the fiducial point.

lon_polefloat or or Quantity

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

n_outputs

return_units

Output units.

Methods Summary

__call__(self, \*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(self, alpha_C, delta_C, lon, lat, …)

Parameters

Attributes Documentation

input_units

Input units.

n_inputs = 2
n_outputs = 2
return_units

Output units.

Methods Documentation

__call__(self, *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(self, alpha_C, delta_C, lon, lat, lon_pole)[source]
Parameters
alpha_C, delta_Cfloat (deg) or Quantity

Angles in the Celestial coordinate frame.

lon, lat, lon_polefloat (deg) or Quantity

Parameter values when the model was initialized.

Returns
phi_N, theta_Nfloat (deg) or Quantity

Angles on the Native sphere.