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http://dx.doi.org/10.11108/kagis.2011.14.2.069

Correlation Analysis Between Soil Moisture Retrieved from Satellite Images and Ground Network Measurements  

Kim, Gwang-Seob (School of Archi. and Civil Engineering, Kyungpook National University)
Kim, Jong-Pil (School of Archi. and Civil Engineering, Kyungpook National University)
Publication Information
Journal of the Korean Association of Geographic Information Studies / v.14, no.2, 2011 , pp. 69-81 More about this Journal
Abstract
The soil moisture data of the National Aeronautics and Space Administration(NASA) and the Vrije Universiteit Amsterdam(VUA) in collaboration with NASA, retrieved from Advanced Microwave Scanning Radiometer-Earth observing system(AMSR-E) brightness temperature, were collected to evaluate the applicability of the remote sensed soil moisture in South Korea. The averages of the soil moisture by in-situ sensors, by NASA and by VUA-NASA are approximately 0.218, 0.119, and $0.402m^3/m^3$, respectively. This indicates that the soil moisture of NASA was underestimated and that of VUA-NASA was overestimated. The soil moisture products of VUA-NASA showed a better relationship with the in-situ data than that of NASA data. However, there are still limitations of C-band soil moisture measurements. To improve the applicability of satellite soil moisture measurements, bias correction and other post processings are essential using in-situ soil moisture measurements at various surface conditions.
Keywords
Remote Sensing; AMSR-E; Soil Moisture; Correlation Analysis;
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Times Cited By KSCI : 2  (Citation Analysis)
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