System Characterization and Polarimetric Calibration of the Ku-Band Advanced Polarimetric Interferometer
Conference: EUSAR 2016 - 11th European Conference on Synthetic Aperture Radar
06/06/2016 - 06/09/2016 at Hamburg, Germany
Proceedings: EUSAR 2016
Pages: 6Language: englishTyp: PDF
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Authors:
Baffelli, Simone (Earth Observation & Remote Sensing, ETH Zurich, Switzerland)
Frey, Othmar (Earth Observation & Remote Sensing, ETH Zurich, Switzerland & Gamma Remote Sensing, Gümligen, Switzerland)
Werner, Charles (Gamma Remote Sensing, Gümligen, Switzerland)
Hajnsek, Irena (Earth Observation & Remote Sensing, ETH Zurich, Switzerland & Microwaves & Radar Institute, Oberpfaffenhofen, German Aerospace Center (DLR), Germany)
Abstract:
This paper addresses the system characterization and the polarimetric calibration of the Ku-Band Advanced Polarimetric Interferometer (KAPRI). KAPRI is an FMCW ground-based real aperture radar system that uses slotted waveguide antennas. The rotation of the antennas introduces undesired phase ramps in azimuth. We present a geometrical model to account for this phase, and propose a method to correct it. Experimental data with a set of trihedral corner reflectors (TCR) in the scene was acquired with the system. A linear phase variation of 30 degrees was observed over the TCR which was geometrically modeled and successfully corrected.