RADAR SYSTEM OF SYNTHETIC OPENING OF SIDE EXPLORATION.

摘要

A side scan SAR system, comprising: a transmission opening, a reception opening of different size, separated from said transmission opening and divided into several reception sub-apertures arranged in two dimensions forming columns in elevation and in azimuth characterized in that: the lateral scan SAR system further comprises means for coherently processing the signals of each receiving sub-aperture, comprising: means for generating a time-varying phase value and a frequency-varying phase value, each of which is determined for each sub-opening, using the local ground radius, the radius of the orbit, the offset nadir angle, the echo time, the pulse length and the SAR signal bandwidth , means for executing a time offset variable by multiplying the value of the time-varying phase by the signal of each azimuth and elevation sub-aperture according to the direction of the time-varying echo and the position of the sub-opening in the reception opening, means for correcting the time-varying offset for the different instants in the transmission pulse, by introducing an adaptive offset dependent on the frequency in each echo signal, in which the frequency-offset offset is adapted to the radar geometry and the position in the receiving sub-aperture, means for the consistent sum of the signals of the sub- openings in an azimuth column for each azimuth column, means on board for storing the summed elevation signals, which refer to each column in azimuth, and means for the transmission to the ground of the summed elevation signals for each column in azimuth