Monitoring of soil moisture and rain precipitation's with in-situ measurements and ERS C-band radar backscattering data

Details Monitoring of soil moisture and rain precipitation's with in-situ measurements and ERS C-band radar backscattering data Monitoring of soil moisture and rain precipitation's with in-situ measurements and ERS C-band radar backscattering data

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.475..327b&link_type=abstract

In: Proceedings of the Third International Symposium on Retrieval of Bio- and Geophysical Parameters from SAR Data for Land Appl

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Scientific paper

In order to improve a better quantitative understanding of the effect of soil moisture of bare soils on C-band SAR data, five dedicated "wheather" stations with soil moisture probes, rain gauges, and temperature thermometers have been installed through the Flevoland test site since April 2000. Soil moisture is collected every ten minutes at two different depths (5 and 10 cm) while rain precipitation is gathered at the same sampling time interval by rain gauges. Since the spring of 2001, soil temperature measurements are also acquired at these two different depths. In addition to the in-situ data, spaceborne SAR data at C-band measured by ERS-2 are also collected (3 images every 70 days), taking advantage that the test site is close-by the locations of the ESA transponders used for calibration of the SAR data. Both in-situ data as well as the radar measurements are incorporated in a database and a detailed analysis can be performed. In this paper, the variations of the backscattering coefficient due to soil moisture changes are shown as well as the effect of rain on the soil moisture at different depths. In addition, the effect due to the variations of the soil temperature on the soil moisture is also illustrated.

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