Method of synchronizing navigation measurement data with S.A.R r

Details Method of synchronizing navigation measurement data with S.A.R r Method of synchronizing navigation measurement data with S.A.R r

1998-07-10

1999-12-21

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Synthetic aperture radar

349189, G01S 1390

Patent

active

06005509&

ABSTRACT:
In a method of synchronizing navigation measurement data according to the invention, first radar data are evaluated by means of the reflectivity-offset method, by means of which the aircraft deviation in the antenna viewing direction is determined. The aircraft deviation in this direction is also determined from the outputs of a navigation system. The temporal courses of the two obtained deviations are cross-correlated. The position of the cross-correlation maximum is determined, and indicates the temporal offset between two associated deviation signals. The radar data are delayed by this amount of time, so synchronization is effected between navigation measurement data and radar data. An optimum compensation of the motion errors can be effected with the synchronized data. The invention can be used in on-board aircraft SAR systems.

REFERENCES:
patent: 5166688 (1992-11-01), Moreira
patent: 5327140 (1994-07-01), Buckreuss
patent: 5590044 (1996-12-01), Buckreuss
patent: 5815111 (1998-09-01), Gouenard et al.
Lord, Richard T. et al, "High range resolution radar using narrowband linear chirps offset in frequency", Comsig '97, pp. 9-12.
Doren, N. et al, "Implementation of Sar interferometric map generation using parallel processors", Igarss '98, vol. 5, pp. 2640-2642, 1998.
Sharif, Amir H. A. et al, "Doppler centroid estimation for azimuth-offset Sars", Naecon '95, vol. 1, pp. 134-139, 1998.
Goblirsch, W., "Motion errors in airborne Sar interferometry", Igarss '98, vol. 5, pp. 2668-2670.

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