Impact of ambiguity resolution with sequential constraints on real-time precise GPS satellite orbit determination | |
Li, Zongnan; Li, Min1; Shi, Chuang1,2; Fan, Lei2; Liu, Yang1,3; Song, Weiwei1; Tang, Weiming1; Zou, Xuan1 | |
刊名 | GPS SOLUTIONS |
2019-07 | |
卷号 | 23期号:3 |
关键词 | Ambiguity resolution Precise orbit determination Real-time SRIF Fixing rate Accuracy evaluation |
ISSN号 | 1080-5370 |
DOI | 10.1007/s10291-019-0878-3 |
英文摘要 | The real-time precise orbit is an essential prerequisite for a real-time precise point positioning service. Focusing on the impact of ambiguity resolution on real-time orbital precision, we propose an efficient approach for real-time ambiguity resolution, which consists of two modules. The first module resolves the double-differenced ambiguities according to their proximity to the nearest integer. The second module sequentially adds the resolved integer ambiguity constraints to the square-root information filter process, after confirming that the same constraints have not been imposed before the current epoch. To validate our method, GPS data collected from 100 globally distributed stations are used to simulate a real-time precise orbit determination. The convergence performance is analyzed, and the accuracy of the orbit is evaluated. The results show that: (1) Almost 90% of the double-differenced ambiguities are fixed correctly in real time for baselines shorter than 1000km. (2) After application of the proposed approach, the root-mean-square errors of all the satellite orbits are reduced from (5.9, 3.4, 2.3)cm to (4.7, 2.6, 2.2)cm for the along-track, cross-track and radial directions, respectively, with improvements of about 22% for the along-track and cross-track directions, and 6% for the radial direction. (3) Simulated real-time orbits determined with this method can obtain almost the same accuracy as some ultra-rapid products and, particularly, better accuracy can be achieved for eclipsing satellites. |
资助项目 | Shanxi Key Laboratory of Integrated and Intelligent Navigation[SKLIIN-20180202] |
WOS关键词 | IGS ; MODEL |
WOS研究方向 | Remote Sensing |
语种 | 英语 |
出版者 | SPRINGER HEIDELBERG |
WOS记录号 | WOS:000472182100002 |
内容类型 | 期刊论文 |
源URL | [http://ir.fio.com.cn:8080/handle/2SI8HI0U/24576] |
专题 | 自然资源部第一海洋研究所 |
通讯作者 | Li, Min; Shi, Chuang |
作者单位 | 1.Wuhan Univ, GNSS Res Ctr, 129 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China 2.Beihang Univ, Sch Elect Engn, 37 Acad Rd, Beijing 100083, Peoples R China 3.Minist Nat Resources, Inst Oceanog 1, 6 Xianxialing Rd, Qingdao 266061, Shandong, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Zongnan,Li, Min,Shi, Chuang,et al. Impact of ambiguity resolution with sequential constraints on real-time precise GPS satellite orbit determination[J]. GPS SOLUTIONS,2019,23(3). |
APA | Li, Zongnan.,Li, Min.,Shi, Chuang.,Fan, Lei.,Liu, Yang.,...&Zou, Xuan.(2019).Impact of ambiguity resolution with sequential constraints on real-time precise GPS satellite orbit determination.GPS SOLUTIONS,23(3). |
MLA | Li, Zongnan,et al."Impact of ambiguity resolution with sequential constraints on real-time precise GPS satellite orbit determination".GPS SOLUTIONS 23.3(2019). |
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