Continuing my previous posts on the Analemma, one can calculate the Sun's position during the day here in Las Vegas, NV. This position is typically given by angles -- azimuth, and altitude. The azimuth is clockwise from north, which is conventional for aviators. So the Sun rises in the East, about 90 degrees, and sets in the West about 270 degrees. At the midday zenith is South. Hence, one sees the value for having a southern exposure in terms of getting the day's light. At this time of year, we see that it is near vertical at 70 degrees.

This project is available under GNU GPL at https://github.com/str255/sun-mc
For your location edit the example parameters in equation_of_time.mc.