摘要
采用经典的Hatch滤波方法进行载波相位平滑伪距,单频接收机数据会引入电离层变化率的累计误差。根据电离层变化率和伪距噪声的大小,可使用自适应窗口的最优Hatch滤波平滑。利用相邻测站观测数据求解单频接收机伪距噪声,利用全球电离层模型(global ionosphere maps,GIM)求电离层变化率,实现对低价单频接收机最优窗口载波相位平滑伪距方法的构建。实测数据算例表明,相对于经典平滑方法结果,基于最优窗口的相位平滑伪距单点定位结果在N、E、U方向上定位结果的精度均有所提高,其中N方向上提高了11.0%,E方向上提高了18.3%;U方向上提高了23.8%。
Classic Hatch filter method is used to smooth the carrier phase pseudorange,and the data of single frequency receiver will introduce the cumulative errors of the ionosphere delay variation.The optimal Hatch filter with adaptive windows can be used for smoothing according to the ionosphere delay variation and the pseudorange noise.We use the observation data of adjacent stations to solve the pseudorange noise of single frequency receiver.And the global ionosphere model(GIM)is used to calculate the ionosphere delay variation.So that a carrier phase smoothing pseudorange method with optimal windows is constructed for single frequency receiver.The results of measured data show that,compared with the results of the classical smoothing method,the positioning result accuracy of the phase smoothing pseudorange single point based on optimal window is improved in N,E and U directions.The accuracy is improved11.0%,18.3%and 23.8%in N,E and U directions,respectively.
作者
付建强
李淑慧
周厚香
谢名强
张靖雷
徐泽远
FU Jianqiang;LI Shuhui;ZHOU Houxiang;XIE Mingqiang;ZHANG Jinglei;XU Zeyuan(School of land Science and Technology,China University of Geosciences(Beijing),Beijing 100083,China)
出处
《测绘地理信息》
CSCD
2021年第S01期143-147,共5页
Journal of Geomatics
关键词
单频
载波相位平滑伪距
HATCH滤波
最优窗口
single frequency
carrier phase smoothing pseudorange
Hatch filter
optimal window
