Performance Improvement of Carrier phase DGPS Using Clock Bias Drift

This paper presents the carrier phase DGPS method providing a stable navigation solution under the condition of frequent blockage of the GPS signa ls. The proposed algorithm reject the channels having large errors usin g a clock bias dr ift and then calculated the more accurate solution. By investigating the relation between visible satellites' elevation and their clock bias dr ift, a proper thr eshold is set. Simulation shows that the presented result is as good as that of commercial system with real data.본 연구는 한국전자통신연구원 텔레매틱스 사업단의 "GPS/INS/DMI 강결합 및 GPS 데이터 처리 기술 개발" 과제의 일부로 수행된 결과입니다