基于敏感因子的GPS速度测量误差补偿算法

The Compensation Algorithm of GPS Velocity Measurement Error Based on Sense Factors

针对高动态卫星定位弹道测量中速度测量误差较大的问题,提出了基于敏感因子的GPS速度测量误差补偿算法。该算法采用GPS接收机模拟器的测试结果,利用GPS速度测量误差与加速度成正比与高度的平方和速度之积成正比的关系,通过对GPS速度测量误差进行多项式拟合,计算得到加速度、速度和高度对速度测量误差的敏感因子,从而对GPS速度测量误差进行了算法补偿。测试结果表明,该算法大幅度地减小了GPS速度测量误差,有效地提高了卫星定位弹道测量的速度测量精度。

In view of the problem of velocity measurement error of GPS ballistic missile, the GPS velocity masurement er- ror compensation algorithm based on sense factors was put forward. The algorithm was based on the results from the GPS receivers and simulators, taking use of the direct proportion of GPS velocity measurement error and acceleration, the direct proportion of the square of height and the product of its speed. And the sense factors included the measurerr^t error of acceleration, velocity and height after polynomial fitting of the GPS velocity measurement error. And by using of the sense factors, the ~tion algorithm could be realized The results showed that the algorithm decreased the GPS velocity measurement error significantly, and it improved the precision of velocity measurement effectively.