Average Direct Insolation
For practical purposes, a time-average of the direct insolation over the course of the year is commonly used. This averaging takes into account the absence of sunlight during the night, increased scatter in the morning and evening hours, average effects of cloud cover and smog, as well as seasonal variations of the mid-day solar elevation.
Read more about this topic: Direct Insolation
Famous quotes containing the words average and/or direct:
“In ‘70 he married again, and I having, voluntarily, assumed the legal guilt of breaking my marriage contract, do cheerfully accept the legal penalty—a life of celibacy—bringing no charge against him who was my husband, save that he was not much better than the average man.”
—Jane Grey Swisshelm (1815–1884)
“In Europe life is histrionic and dramatized, and ... in America, except when it is trying to be European, it is direct and sincere.”
—William Dean Howells (1837–1920)