Short Arm Electric Field Measurements of Ocean Currents
Abstract
The construction of a bottom mounted electromagnetic current meter which would measure the vertically-averaged conductivity weighted horizontal velocity is necessary for the determination of the true horizontal velocity vector by electromagnetic techniques. A towed surface instrument which is the first prototype for the bottom mounted instrument was constructed and tested during the course of the summer. A salt bridge used in conjunction with a valve switching arrangement permitted the induced electromotive force and the electrode offset potential to be easily determined. Extensive laboratory tests and several field experiments proved the reliability and effectiveness of this design. Field tests included towing the instrument at the ocean surface and emplantment of the instrument on the bottom in shallow water.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1972
- Accession Number
- AD0740133
Entities
People
- Albert J. Williams Iii
- Paul J. Simonetti
- Peter F. Poranski
- Richard J. Jaffee
Organizations
- Woods Hole Oceanographic Institution