Bases: astropy.modeling.projections.Sky2PixProjection, astropy.modeling.projections.PseudoCylindrical
Hammer-Aitoff projection - sky to pixel.
Corresponds to the AIT projection in FITS WCS.
x &= 2 \gamma \cos \theta \sin \frac{\phi}{2} \\ y &= \gamma \sin \theta
where:
\gamma = \frac{180^\circ}{\pi} \sqrt{\frac{2}{1 + \cos \theta \cos(\phi / 2)}}
Methods Summary
evaluate(phi, theta) |
Methods Documentation