Bases: astropy.modeling.projections.Pix2SkyProjection, astropy.modeling.projections.Conic
Alber’s conic equal area projection - pixel to sky.
Corresponds to the COE projection in FITS WCS.
See Conic for a description of the entire equation.
The projection formulæ are:
C &= \gamma / 2 \\ R_\theta &= \frac{180^\circ}{\pi} \frac{2}{\gamma} \sqrt{1 + \sin \theta_1 \sin \theta_2 - \gamma \sin \theta} \\ Y_0 &= \frac{180^\circ}{\pi} \frac{2}{\gamma} \sqrt{1 + \sin \theta_1 \sin \theta_2 - \gamma \sin((\theta_1 + \theta_2)/2)}
where:
\gamma = \sin \theta_1 + \sin \theta_2
Parameters: | sigma : float
delta : float
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Attributes Summary
param_names |
Methods Summary
evaluate(x, y, sigma, delta) |
Attributes Documentation
Methods Documentation