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TitleThe effect of soil and crop residue characteristics on polarimetric radar response
DownloadDownloads (Preprint)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorMcNairn, H; Duguay, C; Brisco, B; Pultz, T J
SourceRemote Sensing of Environment vol. 80, issue 2, 2002 p. 308-320,
Alt SeriesEarth Sciences Sector, Contribution Series 20042989
PublisherElsevier BV
Mediapaper; on-line; digital
File formatpdf
Subjectsremote sensing; SAR imagery; SIR-C; co-polarized phase differences (PPD); linear polarization; polarimetric parameters; circular polarized backscatter; pedestal height; signature plots; crop surface conditions; soil characteristics
Illustrations3-D models; tables; stereograms
AbstractAlthough the interaction between linear polarized microwaves and agricultural targets has been studied extensively, far less is understood about the added information provided from polarimetric Synthetic Aperture Radars (SARs). Using 1994 SIR-C data, this study examines the sensitivity of linear polarizations and polarimetric parameters to conditions present on agricultural fields during the period of pre-planting and post-harvest. The polarimetric parameters investigated include circular polarized backscatter, pedestal height and co-polarized phase differences. The co-polarization signature plots are also discussed. Results indicate that the dominant scattering mechanism from these fields varies depending on the type and amount of residue cover, and whether the crop had been harvested. Radar parameters most sensitive to volume and multiple scattering perform best at characterizing these surface conditions. These parameters are the pedestal height, as well as the linear cross-polarization (HV) and the circular co-polarization (RR). The co-polarization signature plots and the standard deviation associated with the co-polarized phase difference are also useful in categorizing these cover types. However, the field average co-polarized phase difference provides little information on residue and soil characteristics.

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