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A Sum-and-Difference Interferometer System for HF Radio Direction Finding

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2 Author(s)
A. D. Bailey ; Department of Electrical Engineering, University of Illinois, Urbana, Ill. ; W. C. McClure

Radio interferometers have been used for highaccuracy, high-precision source location of radio stars and radio satellites. These systems are generally optimized for a fixed frequency and have efficient means for resolving any and all ambiguities which are inherent in the particular interferometer system. Application of the radio-interferometer principle to wide-band, high-frequency radio direction finding practice by its very nature poses a severe problem of ambiguity resolution, i.e., unique determination of the bearing and elevation angles of arrival of an incident ray having any frequency within the band. A wide-band, high-frequency radio direction finder incorporating sum-and-difference interferometer techniques is described. A salient and novel feature is an analog computer-type calibrator which permits unique determination of the bearing and elevation angles of arrival from data supplied by three two-element interferometers and a central crossed Adcock array. A theoretical analysis is given along with supporting experimental data.

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IEEE Transactions on Aerospace and Navigational Electronics  (Volume:ANE-10 ,  Issue: 1 )