| Autor: |
S. I. Penkin, S.I. Kamenev, V. A. Akulichev, A. V. Nuzhdenko, Y.N. Morgunov |
| Rok vydání: |
2003 |
| Předmět: |
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| Zdroj: |
Oceans '99. MTS/IEEE. Riding the Crest into the 21st Century. Conference and Exhibition. Conference Proceedings (IEEE Cat. No.99CH37008). |
| DOI: |
10.1109/oceans.1999.804776 |
| Popis: |
Summary form only given. Self-contained transmitting and receiving acoustical systems were developed for acoustical monitoring of the oceanic shelf environment. The 250-Hz electromagnetic transducers with 50-Hz bandwidth, the 12-element line vertical array provided with the acoustic positioning unit and measurement unit of the vertical distribution of temperature, the 12-element of two dimensions horizontal array, the United World Time (UWT) unit and the unit of data transmission through radio-communication channel were included as the components of these systems. These systems have been tested and were applied to carry out acoustic experiments in the shelf area of the Sea of Japan. The group travel time of acoustic field modes were measured through transmitting, receiving and cross-correlative processing of a 225-symbol m-sequence code signals. Such measurements, when sounding in one direction and in the other make it possible to determine the projection of current velocity and sound speed perturbation on the acoustic travel. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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