Hi,
a smart solar tracker is supposed to track the sun even if it's not visible to sensors (overcast sky).
The path of the sun differs daily (both azimuth and elevation) for any given latitude repeating precisely every year with a change of the "first point of Aries" every leap year.
You can apply two methods to calculate for the path of the sun:
Use the AIR ALMANACH and write a (huge) look up table or use calculation as used to make up the AIR ALMANACH.
To set the tracker for initial tracking determine the azimuth and elevation for any day, hour and minute and use the basic values (relative bearing to TRUE NORTH) to continue tracking on them.
E.g. latitude: 30degN, date: June 21: time 12:00 (high noon) Use the values of the AIR ALMANACH corrected for your latitude, date and time and hit the "TRACK" button.
Boncuk