EMISAR: An Absolutely Calibrated Polarimetric L- and C-band SAR

Erik Lintz Christensen, Niels Skou, Jørgen Dall, Kim Woelders, Jan Hjelm Jørgensen, Johan Granholm, Søren Nørvang Madsen

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    Abstract

    EMISAR is a high-resolution (2×2 m), fully polarimetric, dual-frequency (L- and C-band) synthetic aperture radar (SAR) system designed for remote-sensing applications. The SAR is operated at high altitudes on a Gulfstream G-3 jet aircraft. The system is very well calibrated and has low sidelobes and low cross-polar contamination. Digital technology has been utilized to realize a flexible and highly stable radar with variable resolution, swath width, and imaging geometry. Thermal control and several calibration loops have been built into the system to ensure system stability and absolute calibration. Accurately measured antenna gains and radiation patterns are included in the calibration. The processing system is developed to support data calibration, which is the key to most of the current applications. Recent interferometric enhancements are important for many scientific applications
    Original languageEnglish
    JournalI E E E Transactions on Geoscience and Remote Sensing
    Volume36
    Issue number6
    Pages (from-to)1852-1865
    ISSN0196-2892
    DOIs
    Publication statusPublished - 1998

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