G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 7/295 (2006.01) G01S 13/72 (2006.01) G01S 13/90 (2006.01)
Patent
CA 2043212
In a method for resolving ambiguity in the determination of antenna angle of view and Doppler frequency in synthetic aperture radar (SAR), by evaluating the dependence of the Doppler frequency on the transmitting frequency a skew of the two-dimensional Fourier power spectrum or the two- dimensional autocorrelation function of radar data is measured in that the radar data are subjected to a range Fourier transformation and for the individual range frequencies in a following Doppler centroid estimator a Doppler centroid determination is carried out in the azimuth direction. By this method the pulse repetition frequency ambiguities are eliminated without any demands having to be made on the data acquisition or a high image contrast; this method can therefore be applied to any region of the raw data matrix. Moreover, no azimuth compression is necessary.
Bamler Richard
Runge Hartmut
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Deutsche Forschungsanstalt Fur Luft-Und Raumfahrt E.v.
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