基于低轨卫星增强的非差高精度导航定位技术与在轨试验验证

随着自动驾驶、精密农业等领域的发展,各领域对高精度导航定位的需求不断增加。在地基增强技术、高轨星基增强技术和传统非差精密单点定位技术的基础上,提出了一种基于低轨卫星增强的非差高精度导航定位技术,研制了基于低轨导航增强技术的低轨导航增强载荷,开发了基于低轨卫星增强的地面自适应卡尔曼滤波非差高精度定位软件,并进行了全球首次基于低轨卫星的信号信息一体化导航增强在轨试验。试验表明:经低轨卫星增强后,地面终端用户定位精度优于30 cm。最后,给出了该技术的后续研究方向,为未来低轨导航增强系统与其他增强系统协同工作,实现广泛应用奠定了基础。

Non-difference High-Precision Navigation and Positioning Technology Based on Low Earth Orbit Satellite Augmentation and Experimental Verification on Orbit

With the development of automatic driving, precision agriculture and other fields, there is a growing demand for high-precision navigation and positioning. Based on ground-based augmentation technology, geostationary earth orbit (GEO) satellite-based augmentation technology and traditional non-difference precision single-point positioning technology, this paper proposes a non-difference high-precision navigation and positioning technology based on low earth orbit (LEO) satellite augmentation, develops LEO navigation augmentation payload, develops ground-based adaptive Kalman filtering non-difference high-precision positioning software based on low-orbit satellite augmentation, and conducts the signal information integration navigation augmentation experiment based on LEO satellites for the first time in the world. It is shown that the ground terminal user positioning accuracy is better than 30 cm through the LEO satellite augmentation. This paper gives the direction of the follow-up research of this technology, which lays the foundation for the future complementation of the LEO navigation augmentation system and other augmentation systems.