Precise Point Positioning with Almost Fully Deployed BDS-3, BDS-2, GPS, GLONASS, Galileo and QZSS Using Precise Products from Different Analysis Centers
Precise Point Positioning with Almost Fully Deployed BDS-3, BDS-2, GPS, GLONASS, Galileo and QZSS Using Precise Products from Different Analysis Centers
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使用来自不同分析中心的精密产品，几乎全面部署 BDS-3、BDS-2、GPS、GLONASS、Galileo 和 QZSS 进行精密单点定位
DOI：
10.3390/rs13193905
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发表时间：
2021-09
期刊：
影响因子：
5
通讯作者：
Lin Pan
中科院分区：
文献类型：
--
作者：
Xuanping Li;Lin Pan
目前，北斗导航卫星系统（包括北斗三号和北斗二号）、全球定位系统、全球导航卫星系统、伽利略和准天顶卫星系统这五个能够提供精确定位服务的卫星系统的空间部分已基本部署完毕，可用卫星数量约为136颗。目前，来自欧洲航天局（ESA）、波茨坦（GFZ）和武汉大学（WHU）分析中心的精确卫星轨道和时钟产品可以支持所有五个卫星系统。因此，有必要研究五系统集成精密单点定位（PPP）（即，GRECJ-PPP），在当前星座状态下使用来自不同分析中心的精确产品。值得注意的是，本研究只关注基于日常观察的购买力平价的长期表现。静态GRECJ-PPP在东/北/上三个方向的收敛时间分别为5.9-6.9/2.6-3.1/6.3-7.1 min，定位精度分别为0.2-0.3/0.2-0.3/1.0-1.1 cm，三个方向的运动学统计值分别为6.8-8.6/3.3-4.0/7.8-8.1 min和1.0-1.1/0.8/2.5-2.6 cm。为了完整起见，虽然分析中心国家空间研究中心（法国国家空间研究中心）的实时精确产品没有包括QZSS卫星，但与其他四个卫星系统（即，GREC-PPP）进行了分析。实时GREC-PPP在三个方向上的静态收敛时间分别为8.7/5.2/11.2 min，静态定位精度分别为0.6/0.8/1.3 cm，动态收敛时间分别为11.5/6.9/13.0 min，动态定位精度分别为1.7/1.6/3.6 cm。为了进行比较，还提供了单系统和双系统PPP的结果。此外，还对不同分析中心的精密产品的一致性进行了表征。
The space segment of all the five satellite systems capable of providing precise position services, namely BeiDou Navigation Satellite System (BDS) (including BDS-3 and BDS-2), Global Positioning System (GPS), GLObal NAvigation Satellite System (GLONASS), Galileo and Quasi-Zenith Satellite System (QZSS), has almost been fully deployed at present, and the number of available satellites is approximately 136. Currently, the precise satellite orbit and clock products from the analysis centers European Space Agency (ESA), GeoForschungsZentrum Potsdam (GFZ) and Wuhan University (WHU) can support all five satellite systems. Thus, it is necessary to investigate the positioning performance of a five-system integrated precise point positioning (PPP) (i.e., GRECJ-PPP) using the precise products from different analysis centers under the current constellation status. It should be noted that this study only focuses on the long-term performance of PPP based on daily observations. The static GRECJ-PPP can provide a convergence time of 5.9–6.9/2.6–3.1/6.3–7.1 min and a positioning accuracy of 0.2–0.3/0.2–0.3/1.0–1.1 cm in east/north/up directions, respectively, while the corresponding kinematic statistics are 6.8–8.6/3.3–4.0/7.8–8.1 min and 1.0–1.1/0.8/2.5–2.6 cm in three directions, respectively. For completeness, although the real-time precise products from the analysis center Centre National d’Etudes Spatiales (CNES) do not incorporate QZSS satellites, the performance of real-time PPP with the other four satellite systems (i.e., GREC-PPP) is also analyzed. The real-time GREC-PPP can achieve a static convergence time of 8.7/5.2/11.2 min, a static positioning accuracy of 0.6/0.8/1.3 cm, a kinematic convergence time of 11.5/6.9/13.0 min, and a kinematic positioning accuracy of 1.7/1.6/3.6 cm in the three directions, respectively. For comparison, the results of single-system and dual-system PPP are also provided. In addition, the consistency of the precise products from different analysis centers is characterized.
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发表时间：
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期刊：
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