Data from synthetic aperture radar, (SAR) systems can be used to estimate ocean wave directional spectra, but the method is limited by nonlinearities associated with the velocity bunching mechanism and the azimuth falloff effect, which reduces the range of azimuth wavelengths that can be observed. A theoretical analysis which suggests that the use of two or more receive antennas, spaced in the along-track direction, may reduce these limitations is presented. Specifically, the band of usable azimuth wavenumbers is shifted by an amount proportional to the antenna spacing, so that a broader range of wavenumbers can be covered by combining the spectrum obtained from the two-antenna signals with the conventional image spectrum.
Estimation of ocean wave spectra using two-antenna SAR systems
Schätzung von Ozeanwellenspektren unter Anwendung von Doppelantennenradarsystemen mit synthetischer Apertur
IEEE Transactions on Geoscience and Remote Sensing ; 29 , 3 ; 463-465
1991
3 Seiten, 9 Quellen
Article (Journal)
English
SPEKTRALANALYSE , MEER , MEERESFORSCHUNG , MEERESOBERFLAECHE , MEERWASSER , OZEANOGRAPHIE , SEEGANG , OBERFLAECHENWELLE , SCHWINGUNGSMESSUNG , FREQUENZSPEKTRUM , RADAR , RADARANTENNE , RICHTUNG , FERNMESSUNG , SYNTHETISCHE APERTUR , SPEKTRUMANALYSATOR , THEORETISCHES ERGEBNIS , AZIMUT , PARAMETERSCHAETZUNG , MESSEN , GRUPPENANTENNE , RADARFERNMESSUNG , RADAR MIT SYNTHETISCHER APERTUR , THEORETISCHE ANALYSE , NICHTLINEARITAET
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