Microwave radiometric sensing of the physical parameters of snow

TitleMicrowave radiometric sensing of the physical parameters of snow
Publication TypeConference Proceedings
Year of Conference1967
AuthorsKennedy, J. M., Sakamoto R. T., and Edgerton A. T.
Conference Name35th Annual Western Snow Conference
Series TitleProceedings of the 35th Annual Western Snow Conference
Date PublishedApril 1967
PublisherWestern Snow Conference
Conference LocationBoise, Idaho
KeywordsRadiomicrowave sensing, Snow research

A field and laboratory measurement program sponsored by the Office of Naval Research and CRREL, is being conducted to determine the response to microwave radiometers to various snow conditions. The field portion of the program was carried out within the confines of Crater Lake National Park, with data obtained from new fallen powder snow and old metamorphosed snow. The measurements were made at three frequencies, 13.5 Ghz, 27 Ghz, and 94 Ghz, (one Ghz equals 10 to the 9th power cycles per second), with microwave temperatures recorded for both horizontal and vertical polarizations at viewing angles ranging from nadir to local horizon. Similar laboratory measurements were made of artificial snow made in an environmental chamber in which snow temperatures and moisture content are controlled. The results of these studies show that different microwave frequencies do not behave in the same manner as the moisture content of the snow. The measurement of these parameters from a remote sensing platform over broad areas of major watersheds would greatly aid in the management of water resources.