Pix2Sky_SlantZenithalPerspective

class astropy.modeling.projections.Pix2Sky_SlantZenithalPerspective(*args, **kwargs)

Bases: Pix2SkyProjection, Zenithal

Slant zenithal perspective projection - pixel to sky.

Corresponds to the SZP projection in FITS WCS.

Parameters:

mufloat

Distance from point of projection to center of sphere in spherical radii, μ. Default is 0.

phi0float

The longitude φ₀ of the reference point, in degrees. Default is 0°.

theta0float

The latitude θ₀ of the reference point, in degrees. Default is 90°.

Attributes Summary

mu
param_names	Names of the parameters that describe models of this type.
phi0
theta0

Attributes Documentation

mu = _ParameterDS('mu', value=0.0)

param_names = ('mu', 'phi0', 'theta0')

Names of the parameters that describe models of this type.

The parameters in this tuple are in the same order they should be passed in when initializing a model of a specific type. Some types of models, such as polynomial models, have a different number of parameters depending on some other property of the model, such as the degree.

When defining a custom model class the value of this attribute is automatically set by the Parameter attributes defined in the class body.

phi0 = _ParameterDS('phi0', value=0.0)

theta0 = _ParameterDS('theta0', value=90.0)