Pix2Sky_BonneEqualArea¶
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class
astropy.modeling.projections.
Pix2Sky_BonneEqualArea
(theta1=0.0, **kwargs)[source]¶ Bases:
astropy.modeling.projections.Pix2SkyProjection
,astropy.modeling.projections.PseudoConic
Bonne’s equal area pseudoconic projection - pixel to sky.
Corresponds to the
BON
projection in FITS WCS.\[\begin{split}\phi &= \frac{\pi}{180^\circ} A_\phi R_\theta / \cos \theta \\ \theta &= Y_0 - R_\theta\end{split}\]where:
\[\begin{split}R_\theta &= \mathrm{sign} \theta_1 \sqrt{x^2 + (Y_0 - y)^2} \\ A_\phi &= \arg\left(\frac{Y_0 - y}{R_\theta}, \frac{x}{R_\theta}\right)\end{split}\]- Parameters
- theta1float
Bonne conformal latitude, in degrees.
Attributes Summary
Methods Summary
evaluate
(x, y, theta1)Evaluate the model on some input variables.
Attributes Documentation
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param_names
= ('theta1',)¶
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theta1
= Parameter('theta1', value=0.0)¶
Methods Documentation