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TitleA General Method for the Calibration of the C-band Convair-580 SAR
DownloadDownloads (Preprint)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorTouzi, R; Livingstone, C E
SourceASAR'03, Montreal, Canada, 25-27 June; 2003 p. 12, Open Access logo Open Access
Alt SeriesEarth Sciences Sector, Contribution Series 20043256
Mediapaper; on-line; digital
File formatpdf
Released2003 01 01
AbstractA general polarimetric model which includes systems whose receiving configuration is independent of the transmitted polarization (one configuration), as well as systems with two distinct receiving configurations, was introduced in [9]. This model was used to develop a calibration method for early X-band polarimetric SAR developed at Canada Centre for Remote Sensing (CCRS) [9]. A simplified method was adapted for the C-band SAR system that is equipped with polarization switches with high isolation (better than 50 dB) [4], [2]. This method leads to an accuracy of 1 to 2 dB in radiometry and 5°in phase, for incidence angles within ±20°from the antenna boresight angle. Tests run on various data sets lead to the conclusion that the Convair-580 SAR system is quite stable in short-term, but is not over the long-term. This requires the deployment of reference point targets during each flight. On the other hand, several data sets demonstrated the existence from time to time of a significant cross-talk term. It is shown that the general calibration method of [9] can still be applied to retrieve pure polarizations from the distorted measurements, and provide an assessment of the system distortion matrix during data acquisition.

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