基于临近空间飞艇定位的伪卫星布局研究

Study on Pseudolite Configuration Scheme Based on Near Space Airships

为满足卫星导航系统由于某种原因暂时不能使用时的导航定位需求,提出了2种基于临近空间飞艇定位的伪卫星方案,重点研究飞艇独立组网定位方案。对飞艇的覆盖区和定位可用区进行了计算,得到在考虑仰角作用下飞艇的实际定位可用区域。通过仿真计算对伪卫星布局与几何精度因子之间的关系进行了分析,得到了伪卫星布局的基本原则,为实际应用提供了定量依据,并给出了伪卫星布局的最佳方案。

To meet the need of navigation when satellite navigation system is out of use temporarily for some reason, two pseudolite schemes based on near space airship are put forward, and the airship configurations is studied with special attention. Then, the coverage and position available area of airship is computed, and the actual position available area of airship under the influence of the elevation is also obtained. Next, the relationship between pseudolite configuration and geometric dilution of precision is analyzed through large amount of simulations, and the basic principles of pseudolite configuration are obtained. Finally, the best pseudolite configuration scheme is put forward.