平滑时间对北斗系统伪距差分定位精度影响分析  

Influence Analysis of Smoothing Interval on Accuracy of BeiDou Navigation Satellite System Code Differential Positioning

作　　者：徐君毅[1,2] 段利华 李文峰 刘保生 

机构地区：[1]信息工程大学地理空间信息学院 [2]西安测绘信息技术总站 [3]66240部队

出　　处：《导航定位学报》2013年第4期8-10,共3页Journal of Navigation and Positioning

摘　　要：相位平滑伪距常被用来改善伪距差分定位的精度。利用多条基线的实测数据,详细分析了不同的平滑时间下北斗系统伪距差分定位的精度。结果表明,随着滤波器平滑时间变长,北斗系统伪距差分定位的精度会明显改善,在高程方向上的改善幅度更加明显。平滑时间取15-30min时,可以满足Ⅱ类精密进近的精度需求。同时平滑时间也不宜过长,这样可能导致滤波器发散,从而降低定位精度。The carrier phase smoothing is generally used to improve the accuracy of code differential positioning.By using real data of several baselines,the accuracy of BeiDou navigation satellite system(BDS)code differential positioning was analyzed.The results show that the longer the smoothing interval,the better the improvement in positioning accuracy,and the improvement for up direction is more significant.When the smoothing interval is between 15-30min,the precision requirement of approach cat II can be satisfied.However,it should be paid attention that the smoothing interval can not be too long.In that case,the divergence problem may occur,and the positioning precision will degrade.

关 键 词：北斗系统 精密进近 局域差分 相位平滑伪距 平滑时间 

分 类 号：P228.1[天文地球—大地测量学与测量工程]