Accession Number : ADD017481

Title :   Vertical Velocity Ambiguity Resolution Method.

Descriptive Note : Patent, Filed 9 May 88, patented 10 Jan 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Winje, Robert L

Report Date : 10 Jan 1995

Pagination or Media Count : 7

Abstract : The present invention relates to a method of resolving an ambiguity in the estimation 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. (AN)

Descriptors :   *ACOUSTIC DETECTORS, *PATENTS, VELOCITY, ALGORITHMS, SIGNAL PROCESSING, UNDERWATER VEHICLES, TIME DEPENDENCE, COMPARISON, MOTION, ESTIMATES, CORRELATION, SOUND TRANSMISSION, GROUND VEHICLES, ACOUSTIC SIGNALS, PHASE SHIFT, ACOUSTIC TRACKING, PULSE TRANSMITTERS

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE