Pix2Sky_ConicOrthomorphic#
- class astropy.modeling.projections.Pix2Sky_ConicOrthomorphic(*args, **kwargs)[源代码]#
-
圆锥正形投影-像素到天空。
对应于
COO
投影适合WCS。见
Conic
对整个方程的描述。投影公式为:
\[\begin{split}C&=\frac{\ln\Left(\frac{\cos\theta_2}{\cos\theta_1}\right)} {\ln\Left[\frac{\tan\left(\frac{90^\circ-\theta_2}{2}\right)} {\tan\left(\frac{90^\circ-\theta_1}{2}\right)}\右]}\\ R_\theta&=\psi\Left [ \tan \left( \frac{{90^\circ - \theta}}{{2}} \right) \right] ^C\\ Y_0&=\psi\Left [ \tan \left( \frac{{90^\circ - \theta_a}}{{2}} \right) \right] ^C\end{split}\]在哪里?
\[\psi=\frac{180^\circ}{\pi}\frac{\cos\theta} {C\Left [\tan\left(\frac{{90^\circ-\theta}}{{2}}\right)\right] ^C}\]