대산항 테스트베드 기반 VDES R-Mode 해상 이동 시험 결과 및 분석

Abstract

Global Navigation Satellite Systems (GNSS) are vulnerable to radio interference, which creates challenges in determining vessel positions at sea. In response, by extending the functionality of the VHF Data Exchange System (VDES) for maritime navigation support, the VDES Ranging Mode (VDES R-Mode) has been proposed. A testbed was established around Daesan Port, and both static and dynamic trials were conducted to assess its feasibility. Initial correction was applied to mitigate bias errors. The results show that positioning errors varied with line-of-sight conditions, transmitter？receiver distance, signalto-noise ratio (SNR), and horizontal dilution of precision (HDOP). The positioning performance remained stable without persistent bias errors. Excluding geographical constraints specific to the west coast of Korea, the results demonstrate the potential of VDES R-Mode as a maritime auxiliary navigation technology.