载波相位平滑伪距及其在差分定位中的应用  

Carrier Phase Smoothed Pseudorange and Its Application in DGPS

作　　者：常志巧[1] 郝金明[1] 李军正[1] 

机构地区：[1]解放军信息工程大学测绘学院,河南郑州450052

出　　处：《海洋测绘》2009年第3期21-23,共3页Hydrographic Surveying and Charting

摘　　要：推导了单频和双频载波相位平滑伪距的Hatch滤波公式,利用两组实测数据进行了载波相位平滑伪距,然后将平滑后的不同观测类型的伪距用于实时差分定位。定位结果表明,C/A码Hatch滤波的差分定位精度高于P码;无电离层组合的Hatch滤波差分定位精度低于C/A码。The formulae of single-frequency and dual-frequency carrier phase smoothed pseudorange Hatch filter are induced firstly. Then two groups real data are processed with the formulae. At last, DGPS is carded through using the different kinds of carder phase smoothed pseudorange. The positioning results show that the positioning precision of smoothed C/A code is higher than smoothed P-code, and the positioning precision of smoothed C/A code is also higher than smoothed free-ionosphere combination.

关 键 词：全球定位系统 相位平滑伪距 HATCH滤波 DGPS P码 C/A码 

分 类 号：P228.1[天文地球—大地测量学与测量工程]