Near-surface moisture profile effects on the microwave emission of bare soils

Author

Kostov, K.G. ; Vichev, B.I.

Author_Institution

Inst. of Electron., Bulgarian Acad. of Sci., Sofia, Bulgaria

Volume

3

fYear

34881

fDate

10-14 Jul1995

Firstpage

1991

Abstract

The effects of the near- surface moisture (NSM) profile on microwave emissivity of smooth bare fields were studied using ground- based L- and X-band microwave radiometers. The results illustrate the influence of the NSM profile on microwave emissivity (volumetric soil moisture relationship of bare nonuniformly) moistened soils and the error limits when estimating the average surface moisture using a single-frequency L-band radiometer. A dual-frequency retrieval algorithm using L- and X-band radiometer data was proposed for calculating the NSM gradient

Keywords

UHF measurement; geophysical techniques; hydrological techniques; microwave measurement; moisture measurement; radiometry; remote sensing; soil; L-band; UHF SHF; X-band; bare soil; dual-frequency retrieval algorithm; emissivity; hydrology; measurement technique; microwave emission; microwave radiometry; near-surface moisture profile; radiowave emission; remote sensing; soil moisture; volumetric soil moisture relationship; water content; Brightness temperature; Frequency estimation; Microwave measurements; Moisture measurement; Radiometers; Soil measurements; Soil moisture; Temperature measurement; Testing; Wavelength measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 1995. IGARSS '95. 'Quantitative Remote Sensing for Science and Applications', International

Conference_Location

Firenze

Print_ISBN

0-7803-2567-2

Type

conf

DOI

10.1109/IGARSS.1995.524088

Filename

524088