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구문석,김영준,최광호,소형민,오상헌,김성철,이형근,황동환,Koo, Moonsuk,Kim, YoungJoon,Choi, Kwang-Ho,So, Hyoungmin,Oh, Sang Heon,Kim, Seong-Cheol,Lee, Hyung-Keun,Hwang, Dong-Hwan 한국군사과학기술학회 2015 한국군사과학기술학회지 Vol.18 No.5
Even though GNSS provides highly accurate navigation information all over the world, it is vulnerable to jamming in the electronic warfare due to its weak signal power. The United States and Korea have plans to use terrestrial navigation systems as back-up systems during outage of GNSS. In order to develop back-up systems of GNSS, an M&S software platform is necessary for performance evaluation of various vehicle trajectories and integrated navigation systems. In this paper a design method of an M&S software is proposed for evaluation of multiple radio positioning integration systems. The proposed M&S software consists of a navigation environment generation part, a navigation algorithm part, a GUI part and a coverage analysis part. Effectiveness of the proposed design method is shown by implementing an M&S software for the GPS, DME and eLoran navigation systems.
GPS/DME 통합항법시스템에서 전파고도계의 효과적인 사용
구문석,소형민,오상헌,황동환,Koo, Moonsuk,So, Hyoungmin,Oh, Sang Heon,Hwang, Dong-Hwan 한국군사과학기술학회 2016 한국군사과학기술학회지 Vol.19 No.2
Many researches on use of local ground navigation systems can be found to overcome vulnerability of GNSS. Effective use of an altimeter is proposed in GNSS/DME integrated navigation systems. A weighted DOP based on statistics of measurement error is derived for a given vehicle motion trajectory. From the derived DOP, the vertical error is estimated. By comparing the estimated vertical error with error specification of the altimeter, use of the altimeter is determined in the GPS/DME integrated navigation systems. In order to show effectiveness of the proposed method, 50 times Monte-Carlo simulations were performed for a GPS/DME integrated navigation system. The results show that the proposed method gives more accurate navigation outputs when the number of GPS satellites in view varies.