NASA NTRS · 20210003869
An empirical algorithm for the retrieval of soil moisture content and surface Room Mean Square
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Dubois, Pascale C.. 1995-12-01. Measuring Soil Moisture With Imaging Radars. https://ntrs.nasa.gov/citations/20210003869
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This report summarizes results from laboratory tests conducted by Applied Research Associates, Inc. (ARA) on soil samples collected from multiple sites within the South Range of the U.S. Air Force Utah Test and Training Range (UTTR). The goal of the laboratory tests was to establish soil constitutive properties and develop computational soil models enabling NASA to simulate impact landings of the Earth Entry System (EES) for the Mars Sample Return (MSR) mission. Test methods and results are presented describing the strength, compressibility, and stiffness of soils in the UTTR South Range including methods to incorporate the measured properties into Ansys LS-DYNAÒ constitutive material models for EES landing simulations.
The Passive/Active L/S-band (PALS) airborne microwave sensor was flown for the first time during the 1999 Southern Great Plains (SGP99) experiment.
The Passive/Active L-/S-band (PALS) microwave instrument has been developed by the Jet Propulsion Laboratory (JPL) to investigate the synergism of radiometer and radar measurements for soil moisture remote sensing.