Bases: astropy.modeling.projections.Sky2PixProjection, astropy.modeling.projections.Zenithal
Zenithal equidistant projection - sky to pixel.
Corresponds to the ZEA projection in FITS WCS.
See Zenithal for a definition of the full transformation.
R_\theta &= \frac{180^\circ}{\pi} \sqrt{2(1 - \sin\theta)} \\ &= \frac{360^\circ}{\pi} \sin\left(\frac{90^\circ - \theta}{2}\right)
Methods Summary
evaluate(phi, theta) |
Methods Documentation