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14 October 1998 Monopulse elevation discrimination experiments in low-angle multipath
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Abstract
Tracking a low-altitude target in elevation is difficult when both direct and reflected radar returns originate within the main beam of the interrogating radar. In such conditions, a conventional monopulse radar is subjected to increased angle noise and bias error in elevation. This is a long-standing, unsolved (in a practical sense) problem in low-elevation target tracking. A novel application of a target extent estimator ('C2') has recently been shown theoretically capable of mitigating both specular and diffuse multipath interference in low-elevation tracking situations. Under Navy Phase II SBIR funding, ORINCON, Signalogic and TRW have collaboratively investigated the application of this technology by processing data collected during X-band experiments on real targets in low-level flight at NAWCWPNS, Point Mugu in early 1998. We describe the design and performance of these flight test experiments and summarize the salient off-line signal processing results, which demonstrated reliable elevation tracking in the horizon region with rms errors typically on the order of one-twentieth of a beamwidth. We conclude with a discussion of areas for future research and development of this technology.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
William J. Bangs II, Joel Bock, and Thomas M. Wagner "Monopulse elevation discrimination experiments in low-angle multipath", Proc. SPIE 3462, Radar Processing, Technology, and Applications III, (14 October 1998); https://doi.org/10.1117/12.326740
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