Accession Number : AD0771454

Title :   Sensitivity Analysis of the Inclinometer Line Current Profiling System.

Descriptive Note : Final rept. 1 Apr-31 Dec 73,

Corporate Author : ROSENSTIEL SCHOOL OF MARINE AND ATMOSPHERIC SCIENCE MIAMI FLA

Personal Author(s) : Daubin,Scott C.

Report Date : DEC 1973

Pagination or Media Count : 60

Abstract : An analysis of the sensitivity of ocean current profiles measured by an inclinometer line to errors in input variables and parameters is presented. These include tension, drag coefficient, line weight density, line diameter and measured angles. Starting with the basic three dimensional equilibrium equations of a line subject to spatially varying currents, the methods of computer analyses are outlined. A procedure for optimizing system design tension to yield minimum current error is developed and results plotted. It is shown that the calculated current error is most sensitive to the neglect of discrete weight (or buoyancy) points. Drag coefficient currently is the parameter of greatest uncertainty. Comparative results from a deep water observation near Bermuda in February 1973 show the computed currents from an inclinometer line contrasted with the current readings from a rotor (Aanderaa) instrument which was integral with the line. (Modified author abstract)

Descriptors :   *Ocean currents, *Measuring instruments, Sensitivity, Buoyancy, Drag

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE