lumos.calculator.get_brightness_coords

lumos.calculator.get_brightness_coords(sat_alt, sat_az, sat_height, sun_alt, sun_az)

Converts from HCS observer coordinates to brightness coordinates.

Parameters:

• sat_alt (float or np.ndarray) – Altitude of satellite (degrees)

• sat_az (float or np.ndarray) – Altitude of satellite (degrees)

• sat_height (float or np.ndarray) – Geodetic height of satellite (meters)

• sun_alt (float) – Altitude of sun (degrees)

• sun_az (float) – Azimuth angle of sun (degrees)

Returns:

• (obs_x, obs_y, obs_z) - Vector from satellite to observer in brightness frame (meters)

• angle_past_terminator - Angle of satellite past terminator (radians)