11. The exact instant of solar noon , when the sun reaches its highest elevation in the sky, varies with the seasons. 12. Even on the equator, sunrise and sunset shift several minutes back and forth through the year, along with solar noon . 13. A common recommendation for residential dwellings is to place living areas facing solar noon and sleeping quarters on the opposite side. 14. The daily motion of the sun across the sky also introduces errors, greatest at the sunrise and sunset and smallest at solar noon . 15. Observing the sun from earth, the "'solar hour angle "'is an expression of time, expressed in angular measurement, usually degrees, from solar noon . 16. The 47-degree difference in the altitude of the sun at solar noon between winter and summer forms the basis of passive solar design. 17. As an example, if you have several panels in a row from east to west, there will be no shading during solar noon . 18. On the equator, the sun will be straight overhead and a vertical stick will cast no shadow at solar noon on the equinoxes. 19. Everything I say is true both for local solar noon and for the midpoint between sunrise and sunset, although those do not exactly coincide. 20. The various sun photometers, radiometers and cameras on the table are used every day at solar noon when the sun is not blocked by clouds.
