Where can I find information about the position of the sun in the sky as a function of latitude, date, and time of day? I tried a search on "altitude and azimuth", but it referred me to a previous posting that I was denied access to for some reason. There was also a reference to a US Navy site, but I was also denied access to that. I hope I don't have to write my own program to derive the appropriate information. I did find some reference to Palm Pilot programs, but I don't have such a PDA, and I would rather not have to carry one with me in the field anyway. I understand generally about the path the sun takes in the sky, but I am having a little trouble visualizing it three dimensionally. Can anyone recommend a reference for a refresher course on such matters?