Simultaneous transmission of tomography transceivers using multiple M-sequence signals

A tomography array which consists of five 200 Hz transceivers was deployed in the Central Equatorial Pacific in December 1998 to monitor the variabili ty of water temperature and current in relation to El Nino. In this experim ent, we intend to perform precise measurement using simultaneous transmissi on from five transceivers. As each transceiver receives an overlapped signa l from other transceivers, multiple M-sequence signals were selected carefu lly and used to discriminate mutual signals among transceivers.