There are a couple of ways to attach an encoder to the mount to track actuator position.
## Sun angle calculation
[Paper on sun angles](https://www.researchgate.net/publication/283051726_A_comprehensive_solar_angles_simulation_and_calculation_using_Matlab)
[matlab function for angles](https://www.mathworks.com/matlabcentral/mlc-downloads/downloads/submissions/5430/versions/1/previews/sun_position.m/index.html)