Performance Evaluation of Integrated GPS/GIOVE Precise Point Positioning
Performance Evaluation of Integrated GPS/GIOVE Precise Point Positioning
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发表时间：
2010-01
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通讯作者：
Wei Cao;A. Hauschild;Peter Steingenberger;R. Langley;L. Urquhart;M. Santos;O. Montenbruck
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作者：
Wei Cao;A. Hauschild;Peter Steingenberger;R. Langley;L. Urquhart;M. Santos;O. Montenbruck
介绍了利用GPS和GIOVE进行双星座单点定位(SPP)和精密单点定位(PPP)的初步结果。GIOVE的实时轨道和时钟产品首次用于定位，这是基于最近建立的刚果网络的观测结果。提出了一种GPS/GIOVE PPP一体化的概念，并给出了SPP和PPP两种模式下GPS/GIOVE定位解的数值结果。运动学数据是在车载天线的现场测试中收集的。此外，还使用屋顶天线收集了静态测量数据。对于SPP来说，纳入一颗GIOVE卫星并不能显著改善静态测量的解决方案。但纳入GIOVE卫星的好处是可以实现更多的定位解决方案，提高动态观测的定位连续性。对于PPP，当使用实时时钟估计(Reticle)系统的实时GIOVE时钟时，GIOVE观测值的加入降低了PPP的性能，而当使用后处理的GIOVE轨道和时钟时，GIOVE观测值的加入确实改善了定位结果。对于运动学观测，当在困难的运动学环境中的两个测试中添加GIOVE观测时，PPP解决方案的可用性有了显著的改善。
This paper presents first results for dual-constellation single point positioning (SPP) and precise point positioning (PPP) with GPS and GIOVE. For the first time, a real-time orbit and clock product for GIOVE has been used for positioning, which is based on observations from the recently established CONGO network. An integrated GPS/GIOVE PPP concept is introduced in this paper and numerical results of GPS/GIOVE positioning solutions in both SPP and PPP modes were obtained. Kinematic data has been collected in a field test with a car-mounted antenna. Additionally, static measurements have been collected with a roof-top antenna. For SPP, the inclusion of a single GIOVE satellite does not yield significant improvements in the solution for the static measurements. But inclusion of a GIOVE satellite has the beneficial effect of enabling more position solutions, improving positioning continuity for the kinematic observations. For PPP, the inclusion of the GIOVE observations degrades the PPP performance when real-time GIOVE clocks from the Real-Time Clock Estimation (RETICLE) system are used, while the addition of GIOVE observations indeed improves the positioning results when post-processed GIOVE orbits and clocks are used. For the kinematic observations, there are significant improvements in the availability of PPP solutions when adding GIOVE observations in both tests in difficult kinematic environments.