Microwave backscatter and emission observed from Shuttle Imaging Radar B and an airborne 1.4 GHz radiometerA soil moisture experiment conducted with the Shuttle Imaging Radar B (SIR-B) is reported. SIR-B operated at 1.28 GHz provided the active microwave measurements, while a 4-beam pushbroom 1.4 GHz radiometer gave the complementary passive microwave measurements. The aircraft measurements were made at an altitude of 330 m, resulting in a ground resolution cell of about 100 m diameter. SIR-B ground resolution from 225 km was about 35 m. More than 150 agricultural fields in the San Joaquin Valley of California were examined in the experiment. The effect of surface roughness height on radar backscatter and radiometric measurements was studied.
Document ID
19860048846
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wang, J. R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Schiue, J. C. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Schmugge, T. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Engman, E. T. (USDA, Agricultural Research Center Beltsville, MD, United States)
Mo, T. (Computer Sciences Corp. Beltsville, MD, United States)
Lawrence, R. W. (NASA Langley Research Center Hampton, VA, United States)