THE INFLUENCE OF RANDOM PHASE ERRORS ON THE ANGULAR RESOLUTION OF SYNTHETIC APERTURE RADAR SYSTEMS
AEROSPACE CORP EL SEGUNDO CA
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The influence of random phase errors on the angular resolution of a focused synthetic aperture radar system is treated. The principal measure of performance has been taken as the mean envelope power at the system output. This system output power is evaluated exactly, although not in closed form, based on the following reasonable assumptions 1 the real beam pattern is Gaussian 2 the random phase error is essentially a geometry independent ergodic process with a Gaussian amplitude distribution and zero mean and 3 the random phase error has a Gaussian correlation function. The curves presented in this report can be used to estimate expected system power response, expected system resolution, and effective aperture length beyond which, in the presence of phase error, little gain in resolution is expected. It was found that multiple s of error with different correlation intervals make explicit solution of the integral equation for system power response practically impossible. In this situation, a reasonable approach is to evaluate the system power response separately for each error. If one of the errors is clearly dominant, it may be regarded as bounding achievable performance.
- Active and Passive Radar Detection and Equipment