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WIDEBAND INTERFEROMETER RADAR STUDY.
SPERRY GYROSCOPE CO GREAT NECK NY RADIATION DIV
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A maximum likelihood approach is applied to the problem of estimating the trajectory parameters of a target utilizing coherent two and three element interferometers. For the purpose of examining resolution, accuracy and ambiguity, a four dimensional ambiguity function, or figure of merit, in range, range-rate, angle and angle-rate is derived. Due to the complexity of this function, its properties are investigated via the six two dimensional ambiguity subsurfaces obtained by treating two parameters at a time. Sets of subsurfaces are presented and their properties are examined for both unity and large time bandwidth waveforms. Accuracy formulas are obtained for the variances and covariances of the errors in range, range-rate, angle and angle-rate. Multiplicative processing techniques are also studied which reduce the angle ambiguity outside the central region of the linear interferometer ambiguity surface. ASFIR is one of the multiplicative techniques investigated. Author
APPROVED FOR PUBLIC RELEASE