Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Sky radiance distribution at 550 nm with θs = 40° and τa(550) = 0.2, for each aerosol model and relative humidity combination. Inner to outer concentric circles represent zeniths of 15°, 40° and 90°. Data presented in orthographic projection (r = cos θ).
