Communications: directive radio wave systems and devices (e.g. – Determining distance – Altimeter
Patent
1997-10-02
1999-02-02
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Determining distance
Altimeter
342123, 342145, 342194, G01S 1308
Patent
active
058671196
ABSTRACT:
An apparatus for measuring the height and cross-track offset of a surface location from a moving platform is defined. First and second antennas positioned on an underside of the platform are directed downwardly toward the surface. A transmitter associated with one of the antennas transmits a signal toward the surface. A first coherent detector associated with the first antenna detects a received signal corresponding to the transmitted signal as reflected by the surface and generates in-phase and quadrature components of the detected signal relative to the transmitted signal. A second coherent detector associated with the second antenna detects a received signal corresponding to the transmitted signal as reflected by the surface and generates a second set of in-phase and quadrature components of the detected signal relative to the transmitted signal. An analog to digital (A/D) converter converts the in-phase and quadrature components into digital information stored in a memory. A digital signal processor processing the digital information stored in the memory determines the height and cross-track offset of the surface location.
REFERENCES:
patent: 3731310 (1973-05-01), Rittenbach
patent: 4103302 (1978-07-01), Roeder et al.
patent: 4106017 (1978-08-01), Roeder et al.
patent: 4359732 (1982-11-01), Martin
patent: 4635060 (1987-01-01), Mertens
patent: 4682175 (1987-07-01), Lazarus
patent: 4717916 (1988-01-01), Adams et al.
patent: 4922254 (1990-05-01), Schuessler et al.
patent: 5170171 (1992-12-01), Brown
patent: 5260708 (1993-11-01), Auterman
patent: 5424743 (1995-06-01), Ghiglia et al.
patent: 5677693 (1997-10-01), Frankot et al.
Corrubia Stacie K.
Fogle Dale A.
Goebel Robert H.
McDonnell Douglas Corporation
Sotomayor John B.
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