Communications: directive radio wave systems and devices (e.g. – Determining direction – Low angle processing
Patent
1990-12-21
1994-07-19
Barron, Jr., Gilberto
Communications: directive radio wave systems and devices (e.g.,
Determining direction
Low angle processing
342152, G01S 1344
Patent
active
053313267
ABSTRACT:
A method for correction errors in radar systems that operate using a crossfeed principle (CFR), in which echo signals are directly received from flying objects, such as an aircraft. In particular, the present invention is used in connection with low-flying objects, in which radar signals are indirectly reflected from the surface of the earth to an antenna of the radar system. Correction terms are determined and weighted, using correction factors, so as to improve the capability of the crossfeed radar system to accurately determine the exact elevation of the flying object. The correction factors that are used to improve the accuracy of the radar system are based upon sea state numbers, or Beaufort numbers, which vary in relation to the shape and/or structure of the reflecting surface.
REFERENCES:
patent: 4084160 (1978-04-01), Leuenberger et al.
patent: 4219816 (1980-08-01), Schenkel et al.
patent: 4449127 (1984-05-01), Sanchez
Barton, "Low-Angle Radar Tracking", Proceedings IEEE vol. 62, No. 6, Jun. 1974, pp. 687-704.
Merrill Skolnik, "Radar Handbook", McGraw-Hill, Inc., 1970, pp. 26-34.
Barron Jr. Gilberto
Siemens-Albis AG
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