首页|BDS-3/BDS-2与BDS-3数据无电离组合PPP定位性能比较分析

BDS-3/BDS-2与BDS-3数据无电离组合PPP定位性能比较分析

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针对北斗系统当前BDS-3/BDS-2与BDS-3数据的PPP定位性能比较分析比较少,在建立北斗无电离层组合PPP定位模型基础上,详细推导了北斗PPP星间单差无电离层组合模糊度固定算法实现流程.基于Visual Studio 2022开发平台,利用C/C++编程语言,设计和开发了一种北斗PPP定位分析软件(BDS_PPP),用于比较分析BDS-3/BDS-2与BDS-3数据无电离层组合PPP定位性能.实验选取北京某CORS网中3个站(TST、DSK、LFZ)2023年155 d UTC8:00-12:00连续4h的B1I/B3I数据进行PPP定位性能比较分析.结果表明:BDS-3/BDS-2和BDS-3数据,无电离层组合PPP的固定解收敛时间和定位精度均优于浮点解定位,其中BDS-3/BDS-2与BDS-3数据的无电离层组合PPP定位收敛后模糊度固定成功率均在95％以上,且获得了平面RMS优于2cm、点位RMS优于5 cm的PPP固定解定位精度;浮点解和固定解,BDS-3/BDS-2数据无电离层组合PPP定位的收敛时间均优于BDS-3数据,在定位精度上基本相当.
Comparative analysis of ionosphere-free combination precise point positioning performance for BDS-3/BDS-2 and BDS-3 data
In view of the fact that BDS system currently providing BDS-3/BDS-2 combined service,the comparative analysis of PPP positioning performance for BDS-3/BDS-2 and BDS-3 data is still relatively scarce.In this paper,based on the establishment of the BDS ionosphere-free combination PPP positioning model,an implementation flowchart of integer ambiguity resolution algorithm for BDS PPP single-difference between-satellites ionosphere-free combination is deduced in detail.The BDS PPP positioning analysis software(short as BDS_PPP)using C/C++programming language based on Visual Studio 2022 development platform is designed and developed applied to compare and analyze the positioning performance of ionosphere-free combination PPP for BDS-3/BDS-2 and BDS-3 data.The B1I/B3I data from three stations(TST,DSK,and LFZ)in a CORS network in Beijing for 155 d UTC 8:00-12:00 for 4 consecutive hours in 2023 are selected for the positioning performance analysis,the results show that the convergence time and the positioning accuracy of ionosphere-free combination PPP fixed resolution are better than the float resolution positioning for not only BDS-3/BDS-2 data but also BDS-3 data,in which the integer ambiguity resolution success rate is 95％above after the positioning convergence of ionosphere-free combination PPP for both of BDS-3/BDS-2 and BDS-3 data,meanwhile the positioning accuracy of BDS PPP fixed resolution is better than 2 cm in the horizontal-RMS and 5 cm in the point-RMS respectively.For both float resolution and fixed resolution,the ionosphere-free combination PPP positioning in terms of convergence time for BDS-3/BDS-2 data is better than for BDS-3 data,while the positioning accuracy is basically comparable.

Beidou navigation satellite systemprecise point positioningionosphere-free combinationinteger ambiguity resolutionBDS dual-frequency data

周命端、崔立锟、白岩松、徐翔、解乾龙、覃钰涵

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北京建筑大学测绘与城市空间信息学院,北京 102616

北斗卫星导航系统 精密单点定位 无电离层组合 模糊度固定 北斗双频数据

中国建设教育协会教育教学科研立项重点课题项目北京建筑大学研究生教育教学质量提升项目

2023011J2023003

2024

10.16251/j.cnki.1009-2307.2024.05.002

测绘科学
中国测绘科学研究院

测绘科学

CSTPCD北大核心
影响因子：0.774
ISSN：1009-2307
年,卷(期)：2024.49(5)
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