pynrc.simul.skyvec2ins.lb2ei¶
- pynrc.simul.skyvec2ins.lb2ei(lmlsun, beta)[source]¶
Convert ecliptic coordinates (lambda-lambda_sun, beta) to alternative ecliptic coordinates (epsilon, i) according to Eq 11 in Leinert et al. 1998.
- Parameters
beta (numpy.ndarray) – Ecplitic longitude in radians.
lmlsun (numpy.ndarray) – Ecliptic lattitude in radians.
- Returns
elong (numpy.ndarray) – Elongation (angular distance from the sun to the field-of-view) in radians.
inc (numpy.ndarray) – Inclination (position angle counted from the ecliptic counterclockwise) in radians.