Pix2Sky_Stereographic#

class astropy.modeling.projections.Pix2Sky_Stereographic(*args, **kwargs)[source]#

Bases: Pix2SkyProjection, Zenithal

Stereographic Projection - pixel to sky.

Corresponds to the STG projection in FITS WCS.

See Zenithal for a definition of the full transformation.

$$\theta ={90}^{\circ }-2{\tan }^{-1}\left(\frac{\pi R_{\theta }}{{360}^{\circ }}\right)$$