摘要
通过分析飞机精密进场的过程与各阶段的性能指标,说明单独的GPS并不能满足飞机精密进场要求,并在此基础上提出了将伪卫星增强GPS系统用于飞机精密进场的思想。给出了垂直保护水平(VPL)的求解公式与参数设置方法,并以此为研究对象深入探讨了伪卫星对GPS的增强在提高系统完善性和可用性的作用。以哈尔滨地区24h接收的GPS信息为实验数据,以飞机第二阶段精密进场的指标为标准,通过Matlab仿真定量分析出伪卫星对GPS系统完善性及其可用性的增强效果。实验结果表明,伪卫星增强后的GPS系统完善性有较大改善,可用性有较大提高。
It＇s brought forward that the idea of applying GPS enhanced by pseudolite to precision approach based on the conclusion that single GPS can not meet the requirement of precision approach by analyzing the performance metrics of process and each phase of precision approach.It is studied how the GPS of pseudolites augmentation improves the availability of systems which have the requirement of integrality based on the VPL＇s solving expressions and parameters＇ setting method.There is also an experiment in the paper with the data of 24 hours GPS information received in Harbin area and the standard of metrics of the second phase of precision approach.The pseudolite＇s effect on improving the integrality and availability of GPS system is analyzed by Matlab emulating.The results indicate that GPS system＇s integrality and availability is much enhanced by pseudolite.
出处
《舰船科学技术》
2010年第6期132-135,共4页
Ship Science and Technology
