| abstract |
Apparatus for a spaceborne or aerial platform, comprising a frequency demultiplexer for frequency demultiplexing a signal corresponding to a range line or an azimuth line of SAR data, and comprising information about a plurality of target points, into a plurality of frequency channels, and compression means for performing compression on each frequency channel, each frequency channel signal comprising information about the same target points. The frequency demultiplexer and the compression means are implemented in hardware. The apparatus may be used for either or both of the range compression and the azimuth compression of a SAR arrangement on board a spaceborne or aerial platform and the SAR arrangement may generate a plurality of sub-images corresponding to the frequency channels from the SAR raw data. The sub-images may be combined by averaging in order to reduce the volume of memory required to store the SAR data. |