Syntheticaperture
Synthetic aperture is a signal processing technique that creates the effect of a larger antenna from measurements collected by a moving sensor. By exploiting the motion of the platform, a relatively small physical aperture can synthesize a much larger aperture, yielding higher angular resolution than the instantaneous aperture would allow.
The method relies on coherent processing: as the platform moves, successive measurements capture phase information that
Common implementations include synthetic aperture radar (SAR), which produces high-resolution radar imagery from aircraft or satellites,
Processing typically includes motion compensation, range compression, along-track or azimuth compression, and image reconstruction using Fourier-domain
Advantages of the technique include achieving high resolution with a modest physical aperture, potential for wider
Synthetic aperture methods have become standard in remote sensing and imaging, notably in spaceborne SAR missions