Precise orbit determination and point positioning using GPS, Glonass, Galileo and BeiDou
Precise orbit determination and point positioning using GPS, Glonass, Galileo and BeiDou
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DOI：
10.2478/jogs-2014-0008
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发表时间：
2014-04
影响因子：
1.3
通讯作者：
J. Tegedor;O. Øvstedal;E. Vigen
中科院分区：
文献类型：
--
作者：
J. Tegedor;O. Øvstedal;E. Vigen
摘要：最先进的精确单点定位（PPP）目前基于 GPS 和 Glonass 导航系统的双频处理。国际 GNSS 服务 (IGS) 通常为这些星座提供最精确的轨道和时钟产品，从而实现厘米级精度的点定位。与此同时，随着伽利略和北斗等新星座的部署，GNSS 格局正在迅速发展。北斗星座目前由14颗运行卫星组成，其中4颗伽利略在轨验证（IOV）卫星正在传输初始伽利略信号。本文重点讨论伽利略和北斗以及 GPS 和格洛纳斯在 PPP 中的集成。所有星座的卫星轨道和时钟都是通过 IGS 多全球导航卫星系统实验 (MGEX) 以及辉固专有参考站网络收集的观测数据进行网络平差生成的。描述了轨道处理策略，并通过不同弧长的轨道重叠来评估伽利略和北斗的轨道精度。给出了运动学后处理的多 GNSS 定位结果。讨论了多星座 PPP 在增强可用性和定位精度方面的优势。
Abstract State of the art Precise Point Positioning (PPP) is currently based on dual-frequency processing of GPS and Glonass navigation systems. The International GNSS Service (IGS) is routinely providing the most accurate orbit and clock products for these constellations, allowing point positioning at centimeter-level accuracy. At the same time, the GNSS landscape is evolving rapidly, with the deployment of new constellations, such as Galileo and BeiDou. The BeiDou constellation currently consists of 14 operational satellites, and the 4 Galileo In-Orbit Validation (IOV) satellites are transmitting initial Galileo signals. This paper focuses on the integration of Galileo and BeiDou in PPP, together with GPS and Glonass. Satellite orbits and clocks for all constellations are generated using a network adjustment with observation data collected by the IGS Multi-GNSS Experiment (MGEX), as well as from Fugro proprietary reference station network. The orbit processing strategy is described, and orbit accuracy for Galileo and BeiDou is assessed via orbit overlaps, for different arc lengths. Kinematic post-processed multi-GNSS positioning results are presented. The benefits of multiconstellation PPP are discussed in terms of enhanced availability and positioning accuracy.