中文摘要：

利用差分测速和Kalman滤波估计相位变率方法对某次航空重力测量的飞行数据进行了解算,通过与GT-1A自带的GPS高精度定位测速软件和WAY-Point软件比对分析,结果表明：采用Kalman滤波估计相位变率的GPS差分测速,能够适应较复杂的运动模式,定速精度达到mm/s级,高于WAY-Point软件的动态测速精度。

英文摘要：

The accuracy of moving carrier’s velocity,which was determined by GPS,depends on mainly accuracy of carrier phase-rate.It is difficult to guarantee accuracy of velocity with raw Doppler and differential phase.Carrier phase-rate estimated from Kalman filter was adopted to determine the velocity instead of Doppler.The model and theory of differential velocity measurement and carrier phase-rate estimated by Kalman filter were introduced.The flight data of a certain airborne gravimetry were calculated with Kalman filter method,and the results were compared with those from GT-1A and WAY-Point.It is indicated that GPS carrier phase-rate estimated from Kalman filter can be adapted to some high-velocity and more complicated movements,its accuracy of velocity measurement can achieve at mm/s level,the result approaches to that by GT-1A and is higher than that with WAY-Point.