G - Physics – 01 – S
Patent
G - Physics
01
S
343/10, 343/26
G01S 13/89 (2006.01) G01S 13/72 (2006.01) G01S 13/90 (2006.01)
Patent
CA 2020644
In a method for extracting motion errors of a platform carrying a coherent imaging radar system from raw radar data, azimuth spectra continuously following each other in time are formed over a set period of time for the imaging of terrains with mainly homogenous ground reflectivities.An estimate of the ground reflectivity part is performed with a Kalman filter and with the aid of the azimuth spectra represented and system parameters entered. Then the antenna pattern part is obtained by dividing the azimuth spectrum by the estimated ground reflecti- vity part. By frequency filtering a separation of the drift angle ? (t) from the velocity Vb(t) in the LOS- direction of the antenna is subsequently performed and then the velocity obtained is subjected to normalization after having been integrated, from which results the displacement in the line of sight direction of the antenna.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Deutsche Forschungsanstalt Fur Luft-Und Raumfahrt E.v.
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