I just wrote: > ...You will find that you can make a beam anywhere within a few tens > of a degree. (To be precise, 0.5 deg at sunrise and sunset, closer > to 0.3 deg near noon.)
I got that backwards. The sun subtends a larger azimuth when it is higher in the sky, so the beam can be formed to point in any direction in a range of something like 0.7 degrees near noon (at mid-latitudes). --Art
