PPP algorithm using BDS new SBAS differential corrections

doi:10.11947/j.AGCS.2019.20180545

Abstract

Abstract: Since January 2017, BDS provides users with decimeter-level SBAS point positioning capability through the broadcasting of upgraded differential corrections, including satellite orbit error corrections, satellite clock error corrections, ionosphere grid corrections and zone corrections. In practice, however, the real-time zone corrections experience discontinuities causing the re-initialization of carrier-phase based positioning. We develop a new BDS SBAS precise point positioning (PPP) algorithm based on the switching of zone corrections among neighboring zones. Applying the new algorithm, users switch to use the zone corrections of the neighboring zones in case of no corrections received of the current zone, and thus avoid positioning re-initialization. Data of 7 BDS tracking stations and real-time kinematic on-road tracks are used to evaluate the new algorithm. Results show that with the implementation of the new algorithm, the positioning accuracy of BDS kinematic dual-frequency PPP is better than 0.3 m and 0.5 m in horizontal and vertical during the period of zone switching. On-road real-time single and dual frequency kinematic PPP shows no positioning re-initialization and the positioning accuracy remains at the level of better than 0.5 m during the discontinuity of zone corrections.

Key words: BeiDou satellite navigation system, satellite based augmentation system, zone correction, precise point positioning

CLC Number:

P228

CHEN Junping, WANG Ahao, ZHANG Yize, ZHOU Jianhua, WANG Binghao, WANG Jiexian. PPP algorithm using BDS new SBAS differential corrections[J]. Acta Geodaetica et Cartographica Sinica, 2019, 48(7): 822-830.

References

[1] 杨元喜.弹性PNT基本框架[J]. 测绘学报,2018,47(1):893-898. YANG Yuanxi. Resilient PNT concept frame[J]. Acta Geodaetica et Cartographica Sinica, 2018, 47(7):893-898.
[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. YANG Yuanxi. Progress, contribution and challenges of compass/BeiDou satellite navigation system[J]. Acta Geodaetica et Cartographica Sinica, 2010, 39(1):1-6.
[3] 杨元喜, 李金龙, 王爱兵, 等. 北斗区域卫星导航系统基本导航定位性能初步评估[J]. 中国科学:地球科学, 2014, 44(1):72-81. YANG Yuanxi, LI Jinlong, WANG Aibing, et al. Preliminary assessment of the navigation and positioning performance of BeiDou regional navigation satellite system[J]. Science China:Earth Sciences, 2014, 44(1):72-81.
[4] 杨元喜, 李金龙, 徐君毅, 等. 中国北斗卫星导航系统对全球PNT用户的贡献[J]. 科学通报, 2011, 56(21):1734-1740. YANG Yuanxi, LI Jinlong, XU Junyi, et al. Contribution of the compass satellite navigation system to global PNT users[J]. Chinese Science Bulletin, 2011, 56(21):1734-1740.
[5] 周建华. 北斗导航与广域差分的性能提升及实验验证[C]//第八届中国卫星导航学术年会. 上海:[s.n.], 2017. ZHOU Jianhua. BDSSIS performance improvement for legacy PNT and differential service[C]//Proceedings of China Satellite Navigation Conference (CSNC) 2017. Shanghai:[s.n.],2017.
[6] 陈俊平, 杨赛男, 周建华, 等. 综合伪距相位观测的北斗导航系统广域差分模型[J]. 测绘学报, 2017, 46(5):537-546. CHEN Junping, YANG Sainan, ZHOU Jianhua, et al. A pseudo-range and phase combined SBAS differential correction model[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(5):537-546.
[7] WU Xiaoli, HU Xiaogong, WANG Gang, et al. Evaluation of compass ionospheric model in GNSS positioning[J]. Advances in Space Research, 2013, 51(6):959-968.
[8] 陈俊平, 张益泽, 周建华, 等. 分区综合改正:服务于北斗分米级星基增强系统的差分改正模型[J]. 测绘学报, 2018, 47(9):1161-1170. DOI:10.11947/j.AGCS.2018.20170156. CHEN Junping, ZHANG Yize, ZHOU Jianhua, et al. Zone correction:a SBAS differential correction model for BDS decimeter-level positioning[J]. Acta Geodaetica et Cartographica Sinica, 2018, 47(9):1161-1170. DOI:10.11947/j.AGCS.2018.20170156.
[9] CHEN Junping, ZHANG Yize, YANG Sainan, et al. A new approach for satellite based GNSS augmentation system:from sub-meter to better than 0.2 meter era[C]//Proceedings of the ION 2015 Pacific PNT Meeting. Honolulu, Hawaii:[s.n.], 2015.
[10] 张益泽, 陈俊平, 杨赛男, 等. 北斗广域差分分区综合改正数定位性能分析[J]. 武汉大学学报(信息科学版), 2019, 44(2):159-165. ZHANG Yize, CHEN Junping, YANG Sainan, et al. Analysis of PPP performance based on BDS comprehensive zone corrections[J]. Geomatics and Information Science of Wuhan University, 2019, 44(2):159-165.
[11] WU Xiaoli, ZHOU Jianhua, TANG Bo, et al. Evaluation of Compass ionospheric grid[J]. GPS Solutions, 2014, 18(4):639-649.
[12] 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 of Geophysical Research, 1997, 102(B3):5005-5017.
[13] 陈俊平, 胡一帆, 张益泽, 等. 北斗星基增强系统性能提升初步评估[J]. 同济大学学报(自然科学版), 2017, 45(7):1075-1082. CHEN Junping, HU Yifan, ZHANG Yize, et al. Preliminary evaluation of performance of BeiDou satellite-based augmentation system[J]. Journal of Tongji University (Natural Science), 2017, 45(7):1075-1082.
[14] GAO Yang, SHEN Xiaobing. A new method for carrier-phase-based precise point positioning[J]. Journal of Navigation, 2002, 49(2):109-116.
[15] SAASTAMOINEN J. Atmospheric correction for the troposphere and stratosphere in radio ranging Satellites[C]//proceedings of The Use of Artificial Satellites for Geodesy. Washington D C:[s.n.], 1972.
[16] ZHANG Yize, CHEN Junping, YANG Sainan, et al. Initial assessment of BDS zone correction[C]//SUN J, LIU J, YANG Y, et al. China Satellite Navigation Conference (CSNC) 2017 Proceedings:Volume Ⅱ. CSNC 2017. Lecture Notes in Electrical Engineering. Singapore:Springer, 2017.
[17] PETIT G, LUZUM B. IERS Conventions(2010)[M]. Frankfurt am Main:Verlag des Bundesamtsfür Kartographie und Geodäsie, 2010.