Point location determination at or close to the surface

This application discloses a method of determining the relative positions of a plurality of points located substantially in a common plane at or close to the surface of the sea, which method comprises deploying at each of said points an acoustic element comprising an acoustic transmitter and/or an a...

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Bibliographic Details
Main Authors NORTON, JR.; JOHN P, COURT; IAN N, HALL; MICHAEL A
Format Patent
LanguageEnglish
Published 27.03.1990
Subjects
ANALOGOUS ARRANGEMENTS USING OTHER WAVES
DETECTING MASSES OR OBJECTS
DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES
MEASURING
PHYSICS
RADIO DIRECTION-FINDING
RADIO NAVIGATION
TESTING
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Summary:This application discloses a method of determining the relative positions of a plurality of points located substantially in a common plane at or close to the surface of the sea, which method comprises deploying at each of said points an acoustic element comprising an acoustic transmitter and/or an acoustic receiver; sequentially actuating at predetermined time intervals at least a predetermined number of the acoustic transmitters and observing the responses of at least a predetermined number of the acoustic receivers in response thereto, such that all of the acoustic elements are operated at least once, whether in the transmit or receive mode or in both said modes; and subjecting the observed responses to signal processing to derive the spacing between each receiving element and each transmitting element, and hence to derive the relative positions of said points.
Bibliography:Application Number: US19880245006