Bidirectional reflectance of the moonlit Earth

From OGO-4 airglow photometer data and computed lunar spectral irradiances at the subsatellite point, the highest radiance over clouds and lowest radiance over open ocean are examined near 3914 A, 5577 A, 5893 A, 6225 A, and 6300 A in terms of bidirectional reflectance. The results are compared to and are consistent with mathematical models of the atmosphere developed by Plass and Kattawar, and with daytime measurements from OSO-3 by Neel, Griffin, and Millard.