Could you explain how this MATLAB snippet implements the AlSat-1N orbit simulation, and what functions are used to convert the solar sensor data into angle values?

The orbit is simulated by propagating the TLE orbit elements (lines 76 - 78 in the main script) to the start of the measurements and then modelling till the end of the measurements. The sun angles of the sensors are obtained from calibrating the raw coarse sun sensor data which was downlinked from the CubeSat and provided to me as a WOD (whole orbit data) csv file. This is done in lines 31 - 33.