pynrc.simul.skyvec2ins.sun_ecliptic_longitude

pynrc.simul.skyvec2ins.sun_ecliptic_longitude(start_date)

Compute ecliptic longitude of sun on a given start date using equations from http://aa.usno.navy.mil/faq/docs/SunApprox.php [broken].

Parameters

start_date (datetime) – Start date of the year-long interval evaluated by skyvec2ins.

Returns

lambda_sun (float) – The longitude of quadrature at day 0.