Bases: astropy.modeling.projections.Pix2SkyProjection, astropy.modeling.projections.Zenithal
Zenithal perspective projection - pixel to sky.
Corresponds to the AZP projection in FITS WCS.
\phi &= \arg(-y \cos \gamma, x) \\ \theta &= \left\{\genfrac{}{}{0pt}{}{\psi - \omega}{\psi + \omega + 180^{\circ}}\right.
where:
\psi &= \arg(\rho, 1) \\ \omega &= \sin^{-1}\left(\frac{\rho \mu}{\sqrt{\rho^2 + 1}}\right) \\ \rho &= \frac{R}{\frac{180^{\circ}}{\pi}(\mu + 1) + y \sin \gamma} \\ R &= \sqrt{x^2 + y^2 \cos^2 \gamma}
Parameters: | mu : float
gamma : float
|
---|
Attributes Summary
gamma | |
mu | |
param_names |
Methods Summary
check_mu(*args, **kwargs) | Deprecated since version 1.1. |
evaluate(x, y, mu, gamma) |
Attributes Documentation
Methods Documentation
Deprecated since version 1.1: this method was never intended as part of the public API and will be removed; if you do need its functionality use model.mu.validator(val)