Vertical velocity ambiguity resolution method

Details Vertical velocity ambiguity resolution method Vertical velocity ambiguity resolution method

1988-05-09

1995-01-10

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Speed determination

G01S 1558

Patent

active

053813847

ABSTRACT:
The present invention relates to a method of resolving an ambiguity in the stimation of vertical velocity of a moving underwater or surface vehicle. Three acoustic pulses are successively transmitted. They are received by a series of detectors located on the vehicle. The time difference between correlated first and second received pulses is measured. The time different between correlated first and third received pulses is also measured. The phase shifts between the three transmitted pulses and three received pulses is measured. This information is used to determine the vertical velocity of the vehicle.

REFERENCES:
patent: 3298024 (1967-01-01), Bohm
patent: 4244026 (1981-01-01), Dickey, Jr.

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