Zenithal¶
-
class
astropy.modeling.projections.
Zenithal
(*args, **kwargs)[source] [edit on github]¶ Bases:
astropy.modeling.projections.Projection
Base class for all Zenithal projections.
Zenithal (or azimuthal) projections map the sphere directly onto a plane. All zenithal projections are specified by defining the radius as a function of native latitude,
.
The pixel-to-sky transformation is defined as:
and the inverse (sky-to-pixel) is defined as: