使用不同分析中心的产品评估静态精确点定位和固定速率,并使用不同分析中心的产品解决相位模糊性
Xingli Sun1,2, Jinjie Yao1, Zhiliang Yang1
1School of Information and Communication Engineering, North University of China, Taiyuan, Shanxi, China.
PloS one
|May 19, 2025
概括
本研究评估了来自多个分析中心的精确点定位与阶段模糊性解决 (PPP-AR) 产品. COD0_OPS_FIN,WUM0_MGX_RAP和WUM0_MGX_FIN产品在GPS和利略定位方面表现出卓越的性能.
科学领域:
- 地测和地质工程的工程.
- 卫星导航系统 卫星导航系统
背景情况:
- 精确点定位与模糊性分辨率 (PPP-AR) 的性能严重依赖于分析中心 (AC) 产品的质量.
- 许多国际GNSS服务 (IGS) 和多GNSS实验 (MGEX) AC现在提供PPP-AR产品,需要全面评估.
研究的目的:
- 综合评估来自不同AC的各种PPP-AR产品的定位性能和模糊性解决 (AR) 确定率.
- 为了比较只有GPS和只有利略的PPP-AR的性能,使用一组完整的产品从选定的AC.
主要方法:
- 来自四个AC (CODE,GFZ,CNES,WHU) 的六个PPP-AR产品 (COD0_MGX_FIN,COD0_OPS_FIN,GBM0_MGX_RAP,GRG0_OPS_FIN,WUM0_MGX_RAP,WUM0_MGX_FIN) 的分析.
- 利用开源的PRIDE PPP-AR软件处理来自42个全球分布的MGEX站的7天GPS和利略数据.
- 评估定位准确性 (东,北,上,3D组件) 和AR固定速率 (宽通道和窄通道).
主要成果:
- 仅用于GPS,GBM0_MGX_RAP显示RMS值约为3mm (东),2mm (北),4mm (上) 和6mm (3D),而其他产品分别达到2mm,2mm,4mm和5mm.
- 与其他产品相比,仅GPS的GBM0_MGX_RAP的窄车道 (NL) 固定率降低了20%左右.
- 只有利略的定位:四个产品 (不包括COD0_MGX_FIN和GBM0_MGX_RAP) 实现了~2mm (东),~1.9mm (北),~5.8mm (上),和~6.4mm (3D). COD0_MGX_FIN: ~2.4mm, ~2.2mm, ~5.9mm, ~6.7mm. 这是一个很大的问题. GBM0_MGX_RAP: ~3.5mm, ~3.0mm, ~8.5mm, ~9.7mm. 这就是为什么.
- 对于五种产品,只有利略的宽线 (WL) 和NL的固定率超过99%,GBM0_MGX_RAP为97.24% (WL) 和92.56% (NL).
结论:
- 对于GPS和利略PPP-AR,COD0_OPS_FIN,WUM0_MGX_RAP和WUM0_MGX_FIN产品在整体性能方面排名最高.
- 在COD0_MGX_FIN和GRG0_OPS_FIN产品中,表现第二好.
- 在定位精度和AR固定速度方面,GBM0_MGX_RAP产品表现相对较差.
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