Acta Geodaetica et Cartographica Sinica >

2016 , Vol. 45 >Issue S2: 12 - 21

DOI: https://doi.org/10.11947/j.AGCS.2016.F021

Study on a High-frequency Multi-GNSS Real-time Precise Clock Estimation Algorithm and Application in GNSS Augment System

  • CHEN Liang ,
  • HU Zhigang ,
  • GENG Changjiang ,
  • GE Maorong
Expand
  • 1. GNSS System Engineering Center, China Academy of Aerospace Electronics Technology, Beijing 100094, China;
    2. Test and Assessment Research Center, China Satellite Navigation Office, Beijing 100094, China;
    3. Research Center of Positioning and Navigation Technology, Wuhan University, Wuhan 430079, China;
    4. Helmholtz Centre Potsdam, German Research Centre for Geosciences(GFZ), Telegrafenberg, 14473 Potsdam, Germany

Received date: 2016-11-25

  Revised date: 2016-12-20

  Online published: 2017-05-20

Supported by

The National Nature Science Foundation of China(No.41604029);State Scholarship Fund for International Innovative Aerospace Talent Project (No.[2015]5138)

Fold

Abstract

GNSS satellite-based differential augment system is based on real-time orbit and clock augment message. The multi-GNSS real-time precise clock error estimation model is studied, and then the parameters estimated in traditional un-difference model are optimized and a high-efficient real-time clock simplified model is proposed and realized. The real-time orbit data processing based on PANDA is also analyzed. The results indicate that the real-time orbit radial accuracy of GPS, BeiDou MEO and Galileo is 1~5 cm, and the radial accuracy of the BeiDou GEO/IGSO satellite is about 10 cm. It is found that the optimized real-time clock simplified model is more efficient in one epoch than un-difference model and can be applied to high-frequency (such as 1 Hz) updating of real-time clock augment message. The results show that the real-time clock error obtained by this model is absolute value and there is no constant bias. Based on the real-time orbit, the GPS real-time clock precision of the simplified model is about 0.24 ns, BeiDou GEO is about 0.50 ns, IGSO/MEO is about 0.22 ns and Galileo is about 0.32 ns. Using the multi-GNSS real-time data stream in GFZ, a multi-GNSS real-time augment prototype system is built and the real-time augment message is being broadcasted on the Internet. The real-time PPP centimeter-level service and meter-level navigation service based on pseudorange are realized based on this prototype system.

Key words： GPS; BeiDou; Galileo; real-time clock bias; high-frequency estimation model; real-time augment system; real-time PPP

Cite this article

CHEN Liang , HU Zhigang , GENG Changjiang , GE Maorong . Study on a High-frequency Multi-GNSS Real-time Precise Clock Estimation Algorithm and Application in GNSS Augment System[J]. Acta Geodaetica et Cartographica Sinica, 2016 , 45(S2) : 12 -21 . DOI: 10.11947/j.AGCS.2016.F021

References

[1] 陈俊勇, 党亚民. 全球导航卫星系统的进展及建设CORS的思考[J]. 地理空间信息, 2009, 7(3):1-4. CHEN Junyong, DANG Yamin. On the Progress in GNSS and the Construction of Its CORS System in China[J]. Geospatial Information, 2009, 7(3):1-4.
[2] OTT J E. The OMNISTAR Virtual Base Station System[C]//Proceedings of IEEE Position Location and Navigation Symposium. Atlanta, GA:IEEE, 1996:590-595.
[3] DIXON K. StarFireTM:A Global SBAS for Sub-decimeter Precise Point Positioning[C]//Proceedings of the 19th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS 2006). Fort Worth, TX:ION, 2006:2286-2296.
[4] 杨元喜. 北斗卫星导航系统的进展、贡献与挑战[J]. 测绘学报, 2010, 39(1):1-6. YANG Yuanxi. Progress, Contribution and Challenges of Compass/Beidou Satellite Navigation System[J]. Acta Geodaetica et Cartographica Sinica, 2010, 39(1):1-6.
[5] LAURICHESSE D, CERRI L, BERTHIAS J P, et al. Real Time Precise GPS Constellation and Clocks Estimation by Means of a Kalman Filter[C]//Proceedings of the 26th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+2013). Nashville, TN:ION, 2013:1155-1163.
[6] LIU Yang, GE Maorong, SHI Chuang, et al. Improving Integer Ambiguity Resolution for GLONASS Precise Orbit Determination. Journal of Geodesy, 2016, 90(8):715-726.
[7] GE Maorong, ZHANG Hongping, JIA Xiaolin, et al. What Is Achievable with Current COMPASS Constellation?[C]//Proceedings of the 25th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS 2012). Nashville, TN:ION, 2012:331-339.
[8] ZHAO Qile, GUO Jing, LI Min, et al. Initial Results of Precise Orbit and Clock Determination for COMPASS Navigation Satellite System[J]. Journal of Geodesy, 2013, 87(5):475-486.
[9] GUO Jing, CHEN Guo, ZHAO Qile, et al. Comparison of Solar Radiation Pressure Models for BDS IGSO and MEO Satellites with Emphasis on Improving Orbit Quality[J]. GPS Solutions, 2016. DOI:10.1007/s10291-016-0540-2.
[10] DAI Xiaolei, GE Maorong, LOU Yidong, et al. Estimating the Yaw-attitude of BDS IGSO and MEO Satellites[J]. Journal of Geodesy, 2015, 89(10):1005-1018.
[11] STEIGENBERGER P, HUGENTOBLER U, LOYER S, et al. Galileo Orbit and Clock Quality of the IGS Multi-GNSS Experiment[J]. Advances in Space Research, 2015, 55(1):269-281.
[12] International GNSS Service (IGS). Products[EB/OL].[2015-08-29].http://www.igs.org/products.
[13] HADAS T, BOSY J. IGS RTS Precise Orbits and Clocks Verification and Quality Degradation over Time[J]. GPS Solutions, 2015, 19(1):93-105.
[14] BOCK H, DACH R, JÄGGI A, et al. High-rate GPS Clock Corrections from CODE:Support of 1 hz Applications[J]. Journal of Geodesy, 2009, 83(11):1083-1094.
[15] ZHANG Xiaohong, LI Xingxing, GUO Fei. Satellite Clock Estimation at 1 Hz for Realtime Kinematic PPP Applications[J]. GPS Solutions, 2011, 15(4):315-324.
[16] GE Maorong, CHEN Junping, DOUŠA J, et al. A Computationally Efficient Approach for Estimating High-rate Satellite Clock Corrections in Realtime[J]. GPS Solutions, 2012, 16(1):9-17.
[17] CHEN Liang, GENG Changjiang, ZHOU Quan, et al. Estimation Strategy and Accuracy Analysis of GNSS Real-time Precise Satellite Clock Error[M]//SUN Jiadong, LIU Jingnan, FAN Shiwei,et al.China Satellite Navigation Conference (CSNC) 2015 Proceedings:Volume Ⅲ. Berlin Heidelberg:Springer, 2015:57-66.
[18] 陈良, 耿长江, 周泉. 北斗/GPS实时精密卫星钟差融合解算模型及精度分析[J]. 测绘学报, 2016, 45(9):1028-1034. DOI:10.11947/j.AGCS.2016.20150296. CHEN Liang, GENG Changjiang, ZHOU Quan. Estimation Model and Accuracy Analysis of Beidou/GPS Real-time Precise Satellite Clock Error Integrated Resolving[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(9):1028-1034. DOI:10.11947/j.AGCS.2016.20150296.
[19] ZHANG Weixin, LOU Yidong, GU Shengfeng, et al. Joint Estimation of GPS/BDS Real-time Clocks and Initial Results[J]. GPS Solutions, 2016, 20(4):665-676.
[20] DACH R, SCHAER S, HUGENTOBLER U, et al. Combined Multi-System GNSS Analysis for Time and Frequency Transfer[C]//Proceedings of the 20th European Frequency and Time Forum. Braunschweig, Germany:IEEE, 2006:530-537.
[21] SPRINGER T A, BEUTLER G, ROTHACHER M. A New Solar Radiation Pressure Model for GPS Satellites[J]. GPS Solutions, 1999, 2(3):50-62.
[22] WU J T, WU S C, HAJJ G A, et al. Effects of Antenna Orientation on GPS Carrier Phase[J]. Manuscripta Geodaetica, 1993(18):91-98.
[23] DILSSNER F, SPRINGER T, SCHÖNEMANN E, et al. Estimation of Satellite Antenna Phase Center Corrections for Beidou[C]//IGS Workshop. Pasadena, CA:IGS, 2014.
[24] 赵齐乐, 刘经南, 葛茂荣, 等. 均方根信息滤波和平滑及其在低轨卫星星载GPS精密定轨中的应用[J]. 武汉大学学报(信息科学版), 2006, 31(1):12-15. ZHAO Qile, LIU Jingnan, GE Maorong, et al. Applications of Square-Root Information Filtering and Smoothing on Orbit Determination of LEO Satellites with On-board GPS Data. Geomatics and Information Science of Wuhan University, 2016, 31(1):12-15.
[25] LIU Jingnan, GE Maorong. PANDA Software and Its Preliminary Result of Positioning and Orbit Determination. Wuhan University Journal of Natural Sciences, 2003, 8(2):603-609.
[26] SHI C, ZHAO Q, GE M, et al. Introduction to PANDA Software and the Latest Development for High Precision GNSS Data Processing and Application[C]//IGS Analysis Center Workshop 2010. Newcastle upon Tyne, UK.
[27] CHEN Liang, JIAO Wenhai, HUANG Xiaorui, et al. Study on Signal-in-space Errors Calculation Method and Statistical Characterization of Beidou Navigation Satellite System[M]//SUN Jiadong, JIAO Wenhai, WU Haitao, et al. China Satellite Navigation Conference (CSNC) 2013 Proceedings. Berlin Heidelberg:Springer, 2013:423-434.
[28] DENG Z, FRITSCHE M, UHLEMANN M, et al. Reprocessing of GFZ Multi-GNSS product GBM[C]//IGS Workshop. Sydney Australia.
[29] MONTENBRUCK O, STEIGENBERGER P, KHACHIKYAN R, et al. IGS-MGEX:Preparing the Ground for Multi-constellation GNSS Science[Z]. Inside GNSS, 2013, 9(1):42-49.
[30] RTCM Standard 10403.2. Differential GNSS (Global Navigation Satellite Systems) Services-Version 3(February 1, 2013)[Z]. RTCM Paper 104-2013-SC104-STD, 2013.
[31] STVRZE A, MERVART L, WEBER G, et al. The New Version 2.12 of BKG Ntrip Client (BNC)[C]//EGU General Assembly 2016. Vienna, Austria:[s.n.], 2016.
Options
Outlines

/

〈 〉