This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Noontime direct beam terrestrial solar radiation intensity at sea level. en This is graph of the direct beam solar radiation intensity versus day of the year at sea level for and degrees north latitude at solar noon The graph is based on model published in an article by Threlkeld and Jordan Trans ASHRAE Vol The graph shows the