Effective Use of Radio Altimeter in GPS/DME Integrated Navigation Systems

Koo, Moonsuk; So, Hyoungmin; Oh, Sang Heon; Hwang, Dong-Hwan

doi:2016.19.2.272

J. KIMS Technol > Volume 19(2); 2016 > Article

Journal of the Korea Institute of Military Science and Technology 2016;19(2):272-279.
DOI: https://doi.org/10.9766/KIMST.2016.19.2.272

Effective Use of Radio Altimeter in GPS/DME Integrated Navigation Systems

Moonsuk Koo, Hyoungmin So, Sang Heon Oh, Dong-Hwan Hwang

¹Department of Electronics Engineering, Chungnam National University
²The 3rd Research and Development Institute, Agency for Defense Development
³Integrated Navigation Division, Navcours Co., Ltd.

GPS/DME 통합항법시스템에서 전파고도계의 효과적인 사용

구문석, 소형민, 오상헌, 황동환

¹충남대학교 전자공학과
²국방과학연구소 제3기술연구본부
³넵코어스(주) 복합항법부

Abstract

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.

Key Words: GNSS, Ground Navigation, Integrated Navigation System, Altimeter, DOP(Dilution of Precision)