Browse > Article
http://dx.doi.org/10.5394/KINPR.2012.36.10.825

Generation of Grid Maps of GPS Signal Delays in the Troposphere and Analysis of Relative Point Positioning Accuracy Enhancement  

Kim, Dusik (Graduate school of Inha University)
Won, Jihye (Graduate school of Inha University)
Son, Eun-Seong (Graduate school of Inha University)
Park, Kwan-Dong (Department of Geoinformatic Engineering, Inha University)
Publication Information
Journal of Navigation and Port Research / v.36, no.10, 2012 , pp. 825-832 More about this Journal
Abstract
GPS signal delay that caused by dry gases and water vapor in troposphere is a main error source of GPS point positioning and it must be eliminated for precise point positioning. In this paper, we implemented to generate tropospheric delay grid map over the Korean Peninsula based on post-processing method by using the GPS permanent station network in order to determine the availability of tropospheric delay generation algorithm. GIPSY 5.0 was used for GPS data process and nationwide AWS observation network was used to calculate the amount of dry delay and wet delay separately. As the result of grid map's accuracy analysis, the RMSE between grid map data and GPS site data was 0.7mm in ZHD, 7.6mm in ZWD and 8.5mm in ZTD. After grid map accuracy analysis, we applied the calculated tropospheric delay grid map to single frequency relative positioning algorithm and analyzed the positioning accuracy enhancement. As the result, positioning accuracy was improved up to 36% in case of relative positioning of Suwon(SUWN) and Mokpo(MKPO), that the baseline distance is about 297km.
Keywords
GPS; ZTD; ZHD; ZWD; Grid Map;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 김계현(2010), 공간분석, 문운당, pp. 187-202.
2 김두식(2011), "AWS 기상자료 보간을 통한 GPS 가강수량 산출 및 정확도 검증", 석사학위논문, 인하대학교
3 김두식, 이사형, 박관동, 이호석(2011), "GPS 상대측위에서의 관측시간과 기선거리에 따른 좌표정확도 분석", 지적, 제41권, 제1호, pp. 163-171.
4 손은성, 원지혜, 박관동(2012), "중.장기선 GPS L1 상대측위에서 격자형 지역 전리층 모델 적용에 따른 측위 정확도 향상 평가", 한국측량학회지, 제30권, 제5호, pp. 459-466.
5 이민석(2006), "무선인터넷과 RF모뎀을 혼합한 RTKGPS측량정확도 개선", 박사학위논문, 인하대학교
6 Bevis, M., Businger, S., Herring, T. A., Rocken, C., Anthes, R. A. and Ware, R. H.(1992), "GPS Meteorology: Remote Sensing of Atmospheric Water Vapor Using the Global Positioning System", Journal of Geophysical Research, Vol. 97, No. D14, pp. 15787-15801.   DOI
7 Davis, J. L., Herring, T. A., Shapiro, I. I., Rogers, A. E. E. and Elgered, G.(1985), "Geodesy by Radio Interferometry: Effects of Atmospheric Modeling Errors on Estimates of Baseline Length", Radio Science, Vol. 20, No. 6, pp. 1593-1607.   DOI   ScienceOn
8 Elgered, G., Davis J. L., Herring T. A. and Shapro, I. I.(1991), "Geodesy by Radio Interferometry: Water Vapor Radiometry for Estimation of the Wet Delay", Journal of Geophysical Research, Vol. 96, No. B4, pp. 6541-6555.   DOI
9 Hofmann-Wellenhof, B., Lichtenegger, H., and Wasle, E.(2008), GNSS:Global Navigation Satellite Systems: GPS, GLONASS, Galileo & More, Springer/ WienNewYork, pp. 173-191.
10 Hopfield, H. S.(1969), "Two-quadratic Tropospheric Refractivity Profile for Correcting Satellite Data", Journal of Geophysical Research, Vol. 74, No. 18, pp. 4487-4499.   DOI
11 Junkins, J. L., Miller, G. W. and Jancaitis, J. R.(1973), "A Weighting Function Approach to Modelling of Irregular Surfaces", Journal of Geophysical Research, Vol. 78, No. 11, pp. 1794-1803.   DOI
12 Sciarretta, C., Pacione, R., Pace, B., Iacovone, D.(2011), "GPS/EGNOS Tropospheric Corrections for Mobility Applications: The use of ZTD Maps within the SCUTUM Project", ENC-GNSS, London.
13 Webb, F. H. and Zumberge, J. F.(1993), An Introduction to the GIPSY/OASIS-II, JPL Publ., Pasadena, California, USA