Communications: electrical – Selective – Monitoring in addition to control
Patent
1977-03-30
1978-08-01
Farley, Richard A.
Communications: electrical
Selective
Monitoring in addition to control
73170A, 340 3R, G01S 966
Patent
active
041046080
ABSTRACT:
A contour mapping system including compensation for the heave or vertical displacement of a ship due to wave and swell effects, and for correcting errors due to such effects in depth or bottom contour measurements of a body of water. Vertical acceleration A(s) of the ship, measured by a gravity meter accelerometer, is filtered according to the following Laplace transform equation by a cascaded series of filters to yield ship vertical displacement .DELTA.D(s) due solely to heave: ##EQU1## WHERE: .tau..sub.G = GRAVITY METER FILTER BREAKPOINT
REFERENCES:
patent: 3769838 (1963-11-01), Buckler
Sothcott et al., Proceedings of the Conference on Electrical Engineering in cean Technology, pp. 159-174.
De Matteo John J.
Juels Ronald J.
Levrant Melvyn A.
Melling Norman D.
Farley Richard A.
Hansen Henry
Sciascia R. S.
The United States of America as represented by the Secretary of
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