基于SINS辅助的GPS完善性监测方法

摘要

A new approach of GPS integrity based on SINS is studied by means of the Chebyshevs law of great numbers. The magnitude of pseudoranges can be estimated and that which satellite is in trouble can be determined by using only a Kalman filter. A example is given in the case of step-type pseudorange error. The simulation result proves that the new approach is very practical and efficient and the computation load is lower.%以车比雪夫大数定律为基础，研究基于捷联惯导系统（SINS）的全球卫星定位系统（GPS）完善性监测方法.采用一个卡尔曼滤波器滤波，对卫星伪距故障幅值进行估计并判断哪颗卫星出现故障.最后给出了卫星出现阶跃故障的仿真实例.仿真结果表明,该方法能够及时准确地检测出GPS信号故障，计算量较低，适合于工程上应用.