Pix2Sky_HammerAitoff

class astropy.modeling.projections.Pix2Sky_HammerAitoff(*args, **kwargs)

Bases: Pix2SkyProjection, PseudoCylindrical

Hammer-Aitoff projection - pixel to sky.

Corresponds to the AIT projection in FITS WCS.

\[\begin{split}\phi &= 2 \arg \left(2Z^2 - 1, \frac{\pi}{180^\circ} \frac{Z}{2}x\right) \\ \theta &= \sin^{-1}\left(\frac{\pi}{180^\circ}yZ\right)\end{split}\]