Brightness Temperatures of Saturn's Disk and Rings at 400 and 700 Micrometers.
Saturn was observed in two broad submillimeter photometric bands with the rings nearly edge-on. The observed brightness temperatures fall below the predictions of atmospheric models constructed from data at shorter wavelenths, indicating the presence of an opacity source besides pressure-broadened hydrogen lines in the submillimeter region. In combination with earlier measurements at larger inclination angles, these results yield a 400-micrometer brightness temperature for the rings of approximately 75 K.
Whitcomb
S E
SE
Hildebrand
R H
RH
Keene
J
J