FIELD: diagnosing and monitoring radio scattering medium in bistatic radar. SUBSTANCE: device that has antenna with first and second directivity patterns in angular separation and with two outputs, two logarithmic receivers, subtractor, and display is provided in addition with newly introduced antenna having similar third directivity pattern symmetrically turned away from second (intermediate) directivity pattern through angular separation and third output, as well as third logarithmic receiver, three burst-envelope maximum amplitude meters, three subtractors, two squarest, divider, square-root extractor, directivity- pattern width input terminal, and angular separation input terminal. EFFECT: impossibility of aiming antenna precisely onto source; enhanced precision of estimating scattering properties of medium. 1 cl, 2 dwg
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