Soil moisture estimation under sparse vegetation using microwave radiometry at C-band

Author

Chanzy, A. ; Kerr, Y. ; Wigneron, J.-P. ; Calvet, J.C.

Author_Institution

Unite de Sci. du Sol, INRA, Avignon, France

Volume

3

fYear

1997

fDate

3-8 Aug 1997

Firstpage

1090

Abstract

The space borne microwave radiometer will have a lowest frequency in the C-band. The authors have to prepare the use of this band to estimate the soil moisture. This paper considers the case of sparsely vegetated areas encountered in a semi-arid area. This paper is based on the HAPEX-Sahel data set. The authors show that the single scattering albedo could be neglected at C-band when the amount of vegetation is low. The vegetation transmission coefficient can be estimated from the polarization difference at 5.05 GHz and an angle of incidence of 45°. However the obtained relationship needs to be tested in various wetness conditions

Keywords

geophysical techniques; hydrological techniques; microwave measurement; moisture measurement; radiometry; remote sensing; soil; C-band; HAPEX-Sahel; SHF; hydrology; measurement technique; microwave radiometry; remote sensing; semi-arid area; single scattering albedo; soil moisture; spaceborne method; sparsely vegetated area; under sparse vegetation; water content; Frequency; L-band; Microwave radiometry; Polarization; Scattering; Soil measurements; Soil moisture; Temperature measurement; Testing; Vegetation mapping;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing, 1997. IGARSS '97. Remote Sensing - A Scientific Vision for Sustainable Development., 1997 IEEE International

Print_ISBN

0-7803-3836-7

Type

conf

DOI

10.1109/IGARSS.1997.606360

Filename

606360