DocumentCode :
3063222
Title :
The simplified model of soil dielectric constant and soil moisture at the main frequency points of microwave band
Author :
Quan Chen ; Jiangyuan Zeng ; Ping Zhang
Author_Institution :
Key Lab. of Digital Earth, Center for Earth Obs. & Digital Earth, Beijing, China
fYear :
2013
fDate :
21-26 July 2013
Firstpage :
2712
Lastpage :
2715
Abstract :
Surface soil moisture is an important parameter in draught monitoring and crop yield estimation, it is important to obtain spatial-temporal soil moisture information in large range. Microwave signal is much related to dielectric constant of object observed, and soil dielectric constant is determined by soil moisture, which was the basis of the use of microwave remote sensing technology for soil moisture monitoring. To solve the transformation of soil moisture and soil dielectric constant, the Dobson semi-empirical model was used to build a simulated database, and then the Hallikainen formula calibrated by the least square regression method at 1.26/1.4/3.2/5.3/6.9 and 9.6GHz frequency-points were performed to set up the simplified models to transform the real part of the dielectric constant to the soil volumetric moisture content. The validations were performed shows that the simplified models have good accuracy and practicability.
Keywords :
crops; hydrology; permittivity; regression analysis; remote sensing; soil; Dobson semiempirical model; Hallikainen formula; crop yield estimation; draught monitoring; least square regression; microwave band; microwave remote sensing technology; soil dielectric constant; spatial-temporal soil moisture information; surface soil moisture; Accuracy; Data models; Dielectric constant; Dielectric measurement; Remote sensing; Soil moisture; dielectric constant; microwave remote sensing; simplified model; soil moisture;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2013 IEEE International
Conference_Location :
Melbourne, VIC
ISSN :
2153-6996
Print_ISBN :
978-1-4799-1114-1
Type :
conf
DOI :
10.1109/IGARSS.2013.6723383
Filename :
6723383
Link To Document :
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