多星座定位技术已成为卫星导航领域的研究热点和发展趋势。以3组不同长度实测静态基线数据为例,对BDS-3、GPS、Galileo和GLONASS系统10种组合模式下单频和双频RTK的定位性能进行评估。结果表明,当基线不超过5 km时,多系统组合单频RTK可使模糊度固定率达到99%以上,定位精度E、N方向优于5 mm
U方向优于1.1 cm;在双频RTK解算模式下,多系统组合的定位精度优于单系统1~2 mm。当基线约为10 km且GLONASS系统不参与解算时,多系统组合解算模糊度可在30 s内固定,定位精度E、N方向优于5 mm
U方向优于3.1 cm。因此,多星座定位技术对提高卫星导航定位的精度和可靠性具有重要意义。
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