Solar radiation enters the Earth's atmosphere with a portion being scattered by clouds and aerosols.

Processing, archiving and distributing Earth science data
at the NASA Langley Research Center

I can't figure out how to use the ordering system.

Please take the time to take the tour on the Earthdata Search pages which has instructions on using the system, as well as explanations of the screens and menu choices. Tutorials for this ordering tool are available.

If you are still experiencing problems with the ordering system, contact User Services for assistance.