A process for the processing of tops (terrain observation by progressive scan) - sar (synthetic aperture radar) - raw data and the use of the method

摘要

It is carried out a sub-aperture - processing. Within each subaperture, a range compression and a correction of the target range variation is carried out. For the processing of the azimuth signal, a baseband - azimuth - scaling is used, with a long azimuth reference function, and thus a large azimuth dimension be prevented. The scaling - removal is not constant and depends on the distance, which is not equal to the original distance vector. It is calculated in such a way that in combination with a later derotation step, a constant azimuth scanning is achieved for all distances. The selected derotation function, which in the azimuth time range is applied, makes it possible for all the objects are located in the baseband, whereby in this manner the effective chirp - rate is changed. Since the phase as a result of the azimuth scaling - steps -2tes purely is square, therefore, an optimal filter can be used, the chirp - rate is taken into account the effective. An ifft results in a focused image and a final phase function in the time domain makes possible a phase conservation.Use in the sar -, sonar - and seismic raw data, they ethyl 1-cyclopropyl-7-fluoro-8-trifluoromethyl-1,4-dihydro-4-oxo-3-quinolinecarboxylate in the top - mode, as well as other modes, the pivoting of the antenna diagram in the azimuth - and / or the elevation direction use.