Microwave radiometer observations of soil moisture in HAPEX-SAHEL

Thomas J. Schmugge; Andre Chanzy; Yann H. Kerr; Peter van Oevelen

doi:10.1117/12.200781

31 January 1995 Microwave radiometer observations of soil moisture in HAPEX-SAHEL

Thomas J. Schmugge, Andre Chanzy, Yann H. Kerr, Peter van Oevelen

Proceedings Volume 2314, Multispectral and Microwave Sensing of Forestry, Hydrology, and Natural Resources; (1995) https://doi.org/10.1117/12.200781
Event: Satellite Remote Sensing, 1994, Rome, Italy

Abstract

Water stored in the soil serves as the reservoir for the evapotranspiration process, thus the interest in trying to map its spatial and temporal variations in experiments studying the soil- plant-atmosphere interactions at the GCM grid scale. During the 8 week intensive observation period (IOP) of HAPEX-Sahel (Hydrologic Atmospheric Pilot Experiment in the Sahel), this was done with two airborne microwave radiometer systems. The five frequency (5 to 90 GHz) PORTOS radiometer on the French ARAT aircraft and the single frequency (1.42 GHz) multibeam pushbroom microwave radiometer (PBMR) on the NASA C-130 were used. These aircraft measurements were supported by ground based observations at the central sites and, because of several rains during the IOP, covered a good range of soil wetness conditions that existed. The PBMR and the 5.05 GHz PORTOS channel in H polarization show a large dynamic range of TB on each day and between different days in response to variations in rainfall and drying conditions ranging from low TBs of 210 to 220 K for the wettest conditions to values of 280 to 290 K for the driest.

Citation Download Citation

Thomas J. Schmugge, Andre Chanzy, Yann H. Kerr, and Peter van Oevelen "Microwave radiometer observations of soil moisture in HAPEX-SAHEL", Proc. SPIE 2314, Multispectral and Microwave Sensing of Forestry, Hydrology, and Natural Resources, (31 January 1995); https://doi.org/10.1117/12.200781

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