Inferences on spatial and temporal variability of the backscatter from growing crops using AgriSAR data
作者:
C. C. F. YANASSE,
S. QUEGAN,
R. J. MARTIN,
期刊:
International Journal of Remote Sensing
(Taylor Available online 1992)
卷期:
Volume 13,
issue 3
页码: 493-507
ISSN:0143-1161
年代: 1992
DOI:10.1080/01431169208904052
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
AgriSAR 86 data from the Feltwell Site, U.K., was affected by a variety of radiometric distortions. These distortions prevent accurate calibration of the images, but analysis of the image statistics, after some radiometric corrections have been performed, permits a number of qualitative inferences about variations in crop backscatter in time and space. Cereals and sugar beet appear to exhibit different incidence angle responses. The separability of wheat and sugar beet varies with time and incidence angle. The separation of spring barley and wheat varies with time. Cereals show greater spatial variability than sugar beet. Individual fields exhibit great apparent variability in their temporal responses; for sugar beet this can in the main be explained by the effects of speckle, but there is some evidence of real variation for winter wheat.
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