Recently, I started processing tle data using pyorbital python library. I would like to get the solar zenith angle using this function:
astronomy.sun_zenith_angle(utc_time, lon, lat)
In degrees, I get a number between 0° and 180°. I don't really understand this range, because if I understand well, the solar zenith angle is between -180° and 180°. I hope, you can help me!