Title:
【発明の名称】地貌座標位置決め能力を有する精密レーダ高度計
Document Type and Number:
Japanese Patent JP2003522951
Kind Code:
A
Abstract:
A radar altimeter for determining altitude of an air vehicle comprises a transmitter for transmitting radar signals toward the ground. A first and a second antenna receive reflected radar signals from the ground. A signal processor is coupled to the first and the second antennas. The signal processor includes filter means for rejecting signals other than signals reflected from a selected ground swath. The signal processor determines the above ground level altitude of the air vehicle based on the radar signals output from the filter means. A phase ambiguity resolution means resolves phase ambiguities that arise due to multiple wavelength separation of the first and the second antenna. The signal processor also determines the horizontal position of the highest point in the selected ground swath. In a preferred embodiment, the phase ambiguity resolution means comprises a third antenna spaced closely to the first antenna such that there are no phase ambiguities between the reflected radar signals received by the third antenna and the first antenna.
Inventors:
Hager, James Earl
Larry Dee, Almstead
Petrich, Curtis Jay
Larry Dee, Almstead
Petrich, Curtis Jay
Application Number:
JP2001558751A
Publication Date:
July 29, 2003
Filing Date:
February 01, 2001
Export Citation:
Assignee:
Honeywell International Inc.
International Classes:
B64D45/00; G01S7/292; G01S13/10; G01S13/46; G01S13/524; G01S13/88; G01S13/935; G01S13/18; (IPC1-7): G01S13/10; B64D45/00; G01S13/524
Attorney, Agent or Firm:
Kazuo Shamoto (4 outside)