Phase calibration of polarimetric radars from slightly rough surfaces
The phase calibration problem for polarimetric radars is discussed. More specifically, the assumption that the copolar vertical and horizontal returns from a slightly rough surface are in phase is critically reviewed. It is concluded by means of a theoretical analysis that the phase difference for m...
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Veröffentlicht in: | IEEE transactions on geoscience and remote sensing 1994-05, Vol.32 (3), p.712-715 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The phase calibration problem for polarimetric radars is discussed. More specifically, the assumption that the copolar vertical and horizontal returns from a slightly rough surface are in phase is critically reviewed. It is concluded by means of a theoretical analysis that the phase difference for moist soil targets can reach up to 10/spl deg/ at 15 GHz and for incidence angles of 50/spl deg/. However the assumption of zero phase difference is a good approximation for dry soils, lower frequencies, and low incidence angles.< > |
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ISSN: | 0196-2892 1558-0644 |
DOI: | 10.1109/36.297991 |