The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 1978
Filed:
Mar. 30, 1977
Norman D Melling, Doylestown, PA (US);
John J De Matteo, Doylestown, PA (US);
Melvyn A Levrant, Holland, PA (US);
Ronald J Juels, Freeport, NY (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
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