Accession Number : ADP000952

Title :   Draper Laboratory Profiling Current and CTD Meter (PCM),

Corporate Author : CHARLES STARK DRAPER LAB INC CAMBRIDGE MA

Personal Author(s) : Dahlen,John M.

Report Date : FEB 1980

Pagination or Media Count : 12

Abstract : The design of the Draper Laboratory Profiling Current and CTD Meter (PCM) is described. This self-propelled instrument processes and records signals from its sensors in a programmed depth-time sequence. Its most noteworthy features are: an energy-efficient buoyancy control system for sustaining cyclic vertical motion throughout long-term immersion; accurate measurement of current, temperature, and conductivity in the surface wave field; and a microprocessor-centered programmable electronic system for sophisticated control of operational functions. The prototype system is configured to operate unattended on a mooring line while drawing its power solely from internal batteries. It is presently being evaluated in near-surface ocean pilot experiments.

Descriptors :   *Oceanographic equipment, *Measuring instruments, *Profiles, *Ocean currents, *Data acquisition, Experimental design, Prototypes, Self propelled, Buoyancy, Control systems, Vertical orientation, Microprocessors, Computer programming, Long range(Time), Immersion, Temperature, Conductivity, Surface waves, Measurement

Distribution Statement : APPROVED FOR PUBLIC RELEASE