Title :
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
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;
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
DOI :
10.1109/IGARSS.1995.524088
