SAR resolution in the presence of phase errors
Abstract
The author analyzes the effects of phase errors on synthetic aperture radar (SAR). The theory is applied to the following question: how does the achievable resolution vary with the carrier frequency when optimum quadratic focus and/or optimum processing interval (synthetic aperture length) are used? Numerous related results are given, so that much of the material is tutorial. For phase errors corresponding to uncompensated motion, the best achievable rms resolution with any phase error spectrum satisfies the derived equation. For motioninduced phase errors it is seen that resolution improves with increasing carrier frequency when the first term in the expression applies (e.g., for phase errors concentrated at low frequencies) and resolution is independent of carrier frequency when R Delta v/v is the smaller term (e.g., with broad band or high frequency phase errors).
 Publication:

IEEE Transactions on Aerospace Electronic Systems
 Pub Date:
 November 1988
 DOI:
 10.1109/7.18648
 Bibcode:
 1988ITAES..24..808B
 Keywords:

 Antenna Arrays;
 Carrier Frequencies;
 Phase Error;
 Pulse Duration;
 Pulse Repetition Rate;
 Synthetic Aperture Radar;
 Apertures;
 Focusing;
 Fourier Transformation;
 Motion;
 Probability Density Functions;
 Taylor Series;
 Communications and Radar