An Ocean Acoustic Tomography System with a 200 Hz Giant Magnetostrictive Source

This paper describes tomography equipment for measuring ocean phenomena in a 1000 km2 area. A 200 Hz giant magnetostrictive source was developed to increase the transmitting level and decrease the source size. Five 200 Hz transceiver systems were constructed with these sources. These systems have surface buoys for real-time data transmission via the INMARSAT-C. Sea tests of the five transceiver systems were conducted east of the Izu-Ogasawara Trench to observe the Kuroshio Extension during July and September 1997.