pynrc.simul.skyvec2ins.ei2lb

pynrc.simul.skyvec2ins.ei2lb(elong, inc)[source]

Convert alternative ecliptic coordinates (epsilon, i) to ecliptic coordinates (lambda-lambda_sun, beta) according to Eq 12 in Leinert et al. 1998.

Parameters

  • elong (numpy.ndarray) – Elongation (angular distance from the sun) in radians.

  • inc (ndarray) – Inclination (position angle counted from the ecliptic counterclockwise) in radians.

Returns

  • lmlsun (numpy.ndarray) – Differential helioecliptic longitude in radians.

  • beta (numpy.ndarray) – Ecliptic latitude in radians.