BDS/GP S/GLONASS组合单历元姿态测量性能对比分析

摘要

Compared with a single satellite navigation system, the combination of multi-GNSS can significantly in-creases the number of available satellites, and improves the satellite geometry, so the application of combination of multi-GNSS becomes the focus of attention in recent years. The carrier attitude determination with combined BDS/GPS/GLONASS has the unmatchable advantage over a single system in complex observing conditions. This paper describes the double difference model used by ultra-short baseline solution with combined BDS/GPS/GLONASS and the basic principles of attitude determination, then the single-epoch attitude determination performance of multi-frequency combined BDS/GPS/GLONASS is analyzed. By setting different satellite elevation mask angle in static data analysis, it shows that: Compared with a single system or a combination of the two systems, the attitude determination with combined BDS/GPS/GLONASS can effectively improves the accuracy, stability, and availabili-ty. The attitude determination with combined BDS/GPS/GLONASS shows more value when carriers are moving in tall buildings, canyons and other shadowed serious complex environments.%相比于单一卫星导航系统,多卫星导航系统组合具有显著增加可用卫星数目、改善卫星空间几何结构等优点,因而多卫星导航系统组合应用成为近年来关注的热点。在复杂观测条件下,利用BDS/GPS/GLONASS组合进行载体姿态测量具有单系统无法比拟的优势。首先阐述了BDS/GPS/GLONASS组合超短基线解算的双差模型以及姿态测量基本原理；然后分析了BDS/GPS/GLONASS组合多频单历元姿态测量性能。通过实测静态数据设置不同高度截止角进行分析表明：相比于单系统及双系统组合的姿态测量, BDS/GPS/GLONASS组合能够有效地提高姿态测量的精度、稳定性和可用性。当运动载体处于高楼、峡谷等受遮挡严重的复杂环境时,BDS/GPS/GLONASS组合单历元姿态测量更具有应用价值。