摘要
采用接收机原始多普勒、相位历元间差分获得的导出多普勒、基于相位的Kalm an滤波方法获得的导出多普勒3种方法测速,利用Ashtech GPS双频接收机观测的动静态试验数据进行解算,试验结果表明:基于相位的Kalm an滤波方法结果最优,动静态测速精度均可达mm/s量级。在基于相位的Kalm an滤波方法的速度结果的基础上,利用非均匀B样条最小二乘拟合方法计算出载体的加速度,试验结果表明:采用合适的滤波方法和区间静态情况下载体加速度精度可达2×10-8m s-2。
Three methods for GPS differential velocity determination：the first one is the velocity determination of receiver original Doppler, the second is the velocity determination of Doppler derived from the carrier phase and the third derives from Kalman filter based on carrier phase are discussed. A comparison among those approaches is made on the static and dynamic data from Ashtech GPS dual -frequency receivers. The data processing results show that the accuracy of the last one is the best, which can reach the level of ＂mm/s＂. Then, the smoothed acceleration is calculated by B-spline least squares fitting. The results indicate that the accuracy of the vertical acceleration of the carrier in static situation can reach 2 × 10 ^-8ms^-2 by using proper filter method and interval.
出处
《大地测量与地球动力学》
CSCD
北大核心
2009年第5期68-71,75,共5页
Journal of Geodesy and Geodynamics
基金
国家863计划(2006AA06A202)
关键词
航空重力测量
GPS差分测速
多普勒
B样条最小二乘拟合
垂直加速度
airborne gravimetry
GPS differential velocity determination
Doppler
B-spline least squares fitting
vertical acceleration
