Sky2Pix_AZP¶

class astropy.modeling.projections.Sky2Pix_AZP[source] [edit on github]¶

AZP : Zenithal perspective projection - sky to pixel.

$x &= R \sin \phi \\ y &= -R \sec \gamma \cos \theta$

where:

$R = \frac{180^{\circ}}{\pi} \frac{(\mu + 1) \cos \theta}{(\mu + \sin \theta) + \cos \theta \cos \phi \tan \gamma}$

Parameters:

mu : float

distance from point of projection to center of sphere in spherical radii, default is 0.

gamma : float

look angle in deg, default is 0.

Attributes Summary

Methods Summary

`check_mu`(val)
`evaluate`(phi, theta, mu, gamma)

Attributes Documentation

Methods Documentation

classmethod evaluate(phi, theta, mu, gamma)[source] [edit on github]¶