GNSS终端软件算法的改进

针对飞行试验中测控站全球导航卫星系统(GNSS)终端出现卫星定位突然失锁无法恢复问题展开了研究。分析了GNSS终端软件对目标GPS接收机的处理流程和确定参与定位卫星流程,从改进定位结果有效性判断算法、增加对定位结果的有效性判断、改进确定参与定位卫星流程3个方面提出了解决措施。测试结果表明,采用的方法能够解决试验中遇到的难题。

An Improved Algorithm for GNSS Terminal Software

In a flight test,the GNSS terminal of a monitoring and control station lost its satellite positioning suddenly and the problem could not be recovered.To solve this problem,the paper analyzes the procedures used by the GNSS terminal software to process the rocket-borne GPS receiver and determine the satellite involved in positioning,then presents the solutions from the aspects of improving the positioning result validity judgment algorithm,increasing the positioning result validity judgment and improving the procedure of determining the satellite involved in positioning.Test shows that the methods can solve the problem encountered during the test.