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This paper explains about the implementation of a real-time data transmission scheme for coastal data buoy system using Global System for Mobile Communication (GSM). The General Packet Radio Service (GPRS) technology is utilised to handle huge volume of data through low power, higher transmission rate and cost effective means. In conventional buoy system with satellite telemetry using INMARSAT and INSAT, the high resolution raw data collected are not transmitted in real time and only stored due to constrains in the transmission schemes. In this buoy system the stored data would be transmitted through GPRS modem and received through FTP in real time.

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