| Telemetry Lagrangian Measurement of Water Movement in Lake Using GPS and MCA |
| Yasuaki OKUMURA and Shuichi ENDOH |
| Trans. of the Society of Instrument and Control Engineers, vol.31 N0.9 1324-1328, 1995 |
| Buoy tracking system with the GPS navigator and MCA transceiver was developed to measure the water movement in Lake Biwa, Japan. The accuracy of positioning by GPS is about 100 m which is sufficient for the measurement of gyres in the lake. The MCA (multichannel access) radio system was developed for making good use of limited radio frequencies, and 15 radio communication channels are shared by many users. It enables data transfer of buoy locations, which are obtained in real time at the base station. Buoy location is always known, and buoy recovery is easy. A typical example of a buoy track observed in Lake Biwa is presented. |