Calculate the position of the sun in the sky (i.e. Z, the zenith angle) for Los Angeles (34. N, 118.23W) on March 21st (spring equinox) for each daylight hour in intervals of 2 i.e. 6:00, 8:00, 10:00, etc. AND. Assume that the sky is cloudless on this day, calculate Si on a green lawn perpendicular to the solar beam for each of the hours that you use in 

Question 1. Assume that ?a, (atmospheric transmissivity) is constant over the course of the day and is equal to 0.80. Use Appendix A1 Radiation Geometry, part 1b Solar Geometry and the Atmosphere. (20 points)