Compact Polarimetry at longer wavelengths – calibration
Conference: EUSAR 2008 - 7th European Conference on Synthetic Aperture Radar
06/02/2008 - 06/05/2008 at Friedrichshafen, Germany
Proceedings: EUSAR 2008
Pages: 4Language: englishTyp: PDF
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Authors:
Freeman, A. (Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA)
Dubois-Fernandez, P.; Truong-Loï, My-Linh (ONERA, DEMR, Centre de Salon de Provence, BA701, 13661 Salon Air cedex, France)
Abstract:
At longer wavelengths, which are subject to Faraday rotation as they pass through the ionosphere, it can be argued that a circular polarization transmit, linear (H, V) receive implementation of a SAR employing compact polarimetry is the optimum dual-polarized configuration. In this paper, we develop a system model for this implementation of compact polarimetry, and address calibration of such a system. We describe a viable internal/external calibration approach and suggest how the calibration may be verified. Impacts of residual calibration errors on some key applications, such as soil moisture estimation and forest height retrievals, are also considered.