Performance comparison of multi-GNSS and dual-frequency PPP under different models
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摘要: 通过2018年1月多全球卫星导航系统(GNSS)实验(MGEX)的十个测站数据,采用无电离层模型和非差非组合模型,对单系统、双系统和四系统精密单点定位(PPP)进行定位性能分析,定位性能包括收敛时间和定位精度. 实验结果表明,两种PPP模型定位性能相当,但优于单频PPP,在E、N和U方向收敛时间缩短20 min左右,定位精度提高1.6 cm左右;联合多系统能够增加卫星数,改善卫星间几何构型,提升PPP的定位性能. 对GLONASS伪距频间偏差(IFB)采用估计每颗GLONASS卫星的伪距IFB模型和伪距IFB为频率二次多项式模型提升PPP的定位性能,结果表明估计每颗GLONASS卫星的伪距IFB模型要优于伪距IFB为频率二次多项式模型,估计伪距IFB相比忽略伪距IFB在PPP定位性能上有不同程度的提升.
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关键词:
- PPP模型 /
- 多系统组合 /
- 定位精度 /
- 收敛时间 /
- GLONASS伪距频间偏差
Abstract: With the data of BDS, GPS, Galileo and GLONASS of ten stations in MGEX in January 2018, the ionosphere-free model and the un-differenced and uncombined model are used to analyze the positioning performance of PPP in single-system, dual-system and four-system. The positioning performance analyzed in this paper includes convergence time and positioning accuracy. The experimental results show that the positioning performance of the two PPP models is equivalent, and they are better than the single-frequency PPP. The convergence time in the E, N, and U directions is shortened at about 20 minutes, and the positioning accuracy is improved at about 1.6 cm. Multi-GNSS can increase number of satellites, and improve inter-satellite geometry and positioning performance of PPP. The GLONASS pseudorange IFB is estimated to use the pseudorange IFB model and the pseudorange IFB of each GLONASS satellite as the frequency quadratic polynomial model. The results show that the pseudorange IFB model of each GLONASS satellite is better than the pseudorange IFB for the frequency quadratic polynomial model. The two model of pseudorange IFB estimation have certain degree of improvement in PPP positioning performance compared to that ignoring the pseudorange IFB.-
Key words:
- PPP model /
- Multi-GNSS /
- positioning accuracy /
- convergence time /
- GLONASS inter-frequency-bias
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[1] BISNATH S, GAO Y. Current state of Precise Point Positioning and future prospects and limitations[J]. Observing Our Changing Earth, 2009(133):615-643. [2] LI XX, ZHANG X H, REN X, et al, Precise positioning with current multiconstellation Global Navigation Satellite Systems: GPS, GLONASS, Galileo and BeiDou[J]. Scientific Reports. 2015(5):8328.DOI: 10.1038/srepo08328. [3] ZHANG B C, OU J K, YUAN Y B, et al. Extraction of line-of-sight ionospheric observables from GPS data using Precise Point Positioning[J]. Science China Earth Science, 2012, 55(11):1919-1928. DOI: 10.1007/S11430-012-4454-8. [4] CAI CS, GAO Y. Precise Point Positioning using combined GPS and GLONASS observations[J].Journal of Global Positioning Systems, 2007,6(1):13-22.DOI: 10.5081/jgps.6.1.13. [5] DEFRAIGNE P, BAIRE Q. Combining GPS and GLONASS for time and frequency transfer[J]. Adv Space Research, 2011, 47(2):265-275.DOI: 10.1016/j.asr.2010.07.003. [6] AGGREY J, BISNATH S. Dependence of GLONASS pseudorange interfrequency bias on receiverantenna combination and impact on Precise Point Positioning[J]. Navigation: Journal of The Institute of Navigation, 2016, 63(4): 379-391.DOI: 10.1002/navi-168. [7] SHI C, YI W T, SONG W W, et al. GLONASS pseudorange interchannel biases and their effects on combined GPS/GLONASS Precise Point Positioning[J]. GPS Solutions, 2013, 17(4):439-451.DOI: 10.1007/s10291-013-0332-X. [8] GE M R, ZHANG H P, JIA X L, What is achievable with Current COMPASS constellations? [R] Proceedings of the 25 th International Technical Meeting of the Satellite Division of Institute of Navigation(ION GNSS), 2012,23(11): 331-339. [9] LI M, QU L, ZHAO Q, et al. Precise Point Positioning with the BeiDou navigation satellite system[J]. Sensors,2014, 14(1):927-943. DOI: 10.3390/s140100927. [10] KOUBA J, HEROUS P. Precise Point Positioning using IGS orbit and clock products[J]. GPS solutions, 2001, 5(2): 12-28. DOI: 10.1007/PL00012883. [11] DEO M, ElMOWAFY A. Triple-frequency GNSS models for PPP with float ambiguity estimation: performance comparison using GPS[J]. Survey review, 2016,50(360): 249-261.DOI: 10.1080/00396265.2016.1263179. [12] GUO F, ZHANG X, WANG J, et al. Modeling and assessment of triple-frequency BDS Precise Point Positioning[J]. Journal of geodesy, 2016, 90[JP3](11): 1223-1235. DOI: 10.1007/S00190-016-0920-Y. [13] ZHOU F, DONG D N, GE M R, et al. Simultaneous estimation of GLONASS pseudorange inter-frequency biases in Precise Point Positioning using undifferenced and uncombined observations[J]. GPS Solutions, 2018, 22(1): 19. DOI: 10.1007/21s10291-017-0685-7. [14] 周锋. 多系统GNSS非差非组合精密单点定位相关理论和方法研究[D].上海:华东师范大学,2018.
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