Precise navigation for satellites of any kind is the key to future cost-effective Lunar missions. The usability of Global Navigation Satellite Systems (GNSS) for such high-altitude applications is still challenging due to reduced signal power levels, satellites visibility or signal processing complexity with all that resulting in a low position, velocity and time (PVT) accuracy, which is typically expressed by geometric dilution of precision (GDOP) parameters. This paper proposes a navigation method based on re-transmission combined with multi-GNSS concept, specifically signal reception from GPS, Galileo, Glonass, BeiDou and SBAS satellites’ antenna pattern main-lobes and side-lobes. Those signals are re-transmitted from the user satellite at the Lunar distance to the Earth, where all the signal processing is assumed to be performed. Based on the results from the tests of the of modelled scenario, the method presents an improvement of the position dilution of precision (PDOP, a subset of GDOP) parameters for the missions at the Lunar distance.

任何类型卫星的精确导航是未来具有成本效益的月球任务的关键。全球导航卫星系统 (GNSS) 在此类高海拔应用中的可用性仍然具有挑战性，因为信号功率水平、卫星可见性或信号处理复杂性降低，所有这些都会导致位置、速度和时间 (PVT) 精度较低，从而通常由精度的几何稀释 (GDOP) 参数表示。本文提出了一种基于重传结合多GNSS概念的导航方法，特别是从GPS、伽利略、Glonass、北斗和SBAS卫星的天线方向图主瓣和旁瓣接收信号。这些信号从用户卫星在月球距离处重新传输到地球，假设所有信号处理都在地球上进行。