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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/12511

Title: Frequency dependence of polarization phase difference
Authors: RAO, KS
RAO, YS
WANG, JR
Keywords: surface-roughness
soil-moisture
vegetation
Issue Date: 1995
Publisher: TAYLOR & FRANCIS LTD
Citation: INTERNATIONAL JOURNAL OF REMOTE SENSING, 16(18), 3605-3617
Abstract: Polarimetric AIRSAR data of 13 July 1990 acquired over Mahantango watershed area were processed for the identification of cornfields and forested areas. Polarization Phase Difference (PPD) values were computed for the cornfields at P-, L- and C- bands and studied as a function of frequency. The results compare well with the model calculations at 24 degrees incidence angle, whereas the locations of cornfields were computed to be at 35 degrees incidence angle. The discrepancy is attributed to a lack of accurate ground truth and the undulating topography of the cornfields. Another study reported here deals with the usefulness of the Polarization Index (PI) for the study of vegetation. PI was found to be dependent on the frequency for the cornfields, whereas for forest trees no such dependence was noticed. PIHH,HV is a more useful parameter than PIHH,VV even for the study of cornfields.
URI: http://dspace.library.iitb.ac.in/xmlui/handle/10054/12511
http://hdl.handle.net/10054/12511
ISSN: 0143-1161
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