ISB Analysis and Function Model Design in the Real-time BDS/GPS Clock Estimation

doi:10.13474/j.cnki.11-2246.2018.0004

测绘通报 ›› 2018, Vol. 0 ›› Issue (1): 22-27.doi: 10.13474/j.cnki.11-2246.2018.0004

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ISB Analysis and Function Model Design in the Real-time BDS/GPS Clock Estimation

GU Shouzhou^1,2, SHI Chuang¹, DANG Yamin^2,3, BI Jinzhong², XUE Shuqiang², ZHANG Longping^2,3

1. GNSS Research Center, Wuhan University, Wuhan 430079, China;
2. Chinese Academy of Surveying and Mapping, Beijing 100830, China;
3. Shandong University of Science and Technology, Qingdao 266590, China

Received:2017-04-26 Online:2018-01-25 Published:2018-02-05

Abstract

Abstract:

The real-time clock product is the basis products for the high precision wide-area positioning service.Focus on inner-system bias of BDS/GPS,we have studied the ISB difference of BDS GEO/IGSO/MEO with various GNSS receivers,and then proposed three ISB parameters model,finally real-time BDS/GPS clock estimation is achieved with undifferenced method. The BDS/GPS observations of 78 MGEX global sites and 2 Hunan province CORS site are collected to generate the real time clock products that was compared with the final iGMAS precise clock product in two strategies (the old model and the new model). The results show that the accuracy of GPS clock estimation is equivalent with the two strategies,and the accuracy of BDS clock estimation is improved significantly with the new method,especially for the BDS IGSO/MEO satellite,the improvement is more than 20%,which verifies the validity of the algorithm.

Key words: precision clock estimation, three ISB parameters model, undifferenced, BDS/GPS

CLC Number:

P228.4

GU Shouzhou, SHI Chuang, DANG Yamin, BI Jinzhong, XUE Shuqiang, ZHANG Longping. ISB Analysis and Function Model Design in the Real-time BDS/GPS Clock Estimation[J]. 测绘通报, 2018, 0(1): 22-27.

References

[1] 杨元喜,陆明泉,韩春好. GNSS互操作若干问题[J]. 测绘学报,2016,45(3):253-259.
[2] 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.
[3] 杨元喜. 北斗卫星导航系统与测绘学科发展[J]. 测绘科学技术学报,2015,32(1):2.
[4] 刘瑞华,赵庆田,吕小平,等."北斗区域导航系统"非精密进近导航性能分析[J].中国空间科学技术,2015,35(4):53-59,83.
[5] 罗璠,李建文,黄海,等.BDS广播星历的轨道误差分析[J].测绘通报,2015(2):70-72.
[6] ZUMBERGE J F,HEFLIN M B,JEFFERSON D C,et al. Precise Point Positioning for the Efficient and Robust Analysis of GPS Data from Large Networks[J]. Journal Geophysical Research Solid Earth,1997,102(B3):5005-5017.
[7] LOU Y,LIU Y,SHI C,et al.Precise Orbit Determination of BeiDou Constellation Based on BETS and MGEX Network[J]. Scientific Reports,2014,4(8):1255-1264.
[8] 赵齐乐,戴志强,王广兴,等.利用非差观测量估计北斗卫星实时精密钟差[J].武汉大学学报(信息科学版),2016,41(5):686-691.
[9] GE M,CHEN J,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.
[10] HUANG G,ZHANG Q,XU G.Real-time Clock Offset Prediction with an Improved Model[J]. GPS Solutions,2014,18(1):95-104.
[11] 蔡华,赵齐乐,楼益栋. 精密卫星钟差确定系统的实现与精度分析[J]. 武汉大学学报(信息科学版),2009,34(11):1293-1296.
[12] 徐龙威,刘晖,刘玉洁,等.一种顾及GNSS系统间偏差的伪距单点定位方法[J].大地测量与地球动力学,2016,36(9):813-816.
[13] 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.
[14] 叶世榕.GPS非差相位精密单点定位理论与实现[D].武汉:武汉大学,2002.
[15] 刘志强,王解先,段兵兵.单站多参数GLONASS码频间偏差估计及其对组合精密单点定位的影响[J]. 测绘学报,2015,44(2):150-159.
[16] BIERMAN G J. Factorization Methods for Discrete Sequential Estimation[M].New York:Academic Press,1977.

ISB Analysis and Function Model Design in the Real-time BDS/GPS Clock Estimation

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