Publication Date:
2011-08-18
Description:
The radiometric measurements over bare field and fields covered with grass, soybean, corn, and alfalfa were made with 1.4- and 5-GHz microwave radiometers during August-October 1978. The measured results are compared with radiative transfer theory treating the vegetated fields as a two-layer random medium. It is found that the presence of a vegetation cover generally gives a higher brightness temperature T sub B than that expected from a bare soil. The amount of this T sub B excess increases with increase in the vegetation biomass and in the frequency of the observed radiation. The results of radiative transfer calculations, which include a parameter characterizing ground surface roughness, generally match well with the experimental data.
Keywords:
EARTH RESOURCES AND REMOTE SENSING
Type:
IEEE Transactions on Geoscience and Remote Sensing (ISSN 0196-2892); GE-22; 143-150
Format:
text
