Method of measuring point-blank passing time or the like of...

Details Method of measuring point-blank passing time or the like of... Method of measuring point-blank passing time or the like of...

2005-05-10

2005-05-10

Nguyen, Tan Q. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Aeronautical vehicle

C701S010000, C701S223000, C342S052000, C342S065000, C343S703000

Reexamination Certificate

active

06892117

ABSTRACT:
A terrain clearance measuring radio wave being emitted from an airplane is received, and changes in electric field intensity of the radio wave is input and recorded to a computer, whereby the time of occurrence of a sharply appearing peak value of the changes permits accurate measurement of the point-blank passing time, independent of flight frequency.

REFERENCES:
patent: 4179697 (1979-12-01), Golinsky
patent: 5579012 (1996-11-01), Iwakuni et al.
patent: 5608411 (1997-03-01), Rose
patent: 6107962 (2000-08-01), Calvert
patent: 3-55069 (1991-12-01), None
patent: 4-40646 (1992-07-01), None
patent: 6-249704 (1994-09-01), None
patent: 7-63559 (1995-03-01), None

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