摘要
为研究BDS载波相位多路径效应的特征,在强多路径环境下进行连续多天短基线静态数据采集,并计算双差观测值残差序列,分GEO、IGSO、MEO 3类卫星分析BDS多路径重复性,在此基础上研究多路径效应对BDS静态基线解精度的影响。结果表明,BDS多路径误差具有较强的重复性,其中GEO及IGSO卫星的多路径误差重复周期为1d,MEO卫星的多路径误差重复周期为7d;GEO卫星的多路径误差具有系统性偏移,但不是一个常数,而是随时间发生缓慢变化,因此长时间的静态观测并不能平滑该误差,从而导致在较强多路径环境下,BDS多路径误差对其静态解的影响可达cm级。
In order to study the characteristics of BDS carrier phase multipath, the BDS/GPS observa tion data of a short baseline is collected in a strong multipath environment and the repeatability of GEO, IGSO and MEO satellites are analyzed respectively using the double differenced observation residual series. Furthermore, the effects of BDS multipath on static baseline solutions are studied. The results show that BDS multipath errors have a strong repeatability, but the multipath repeat periods differ for distinctive types of satellite. The multipath repeat periods of GEO and IGSO satellites are approximately a sidereal day, while it is around seven sidereal days for the MEO satellites. The muitipath errors of GEO satellites present a nearly systematic shift; not a constant, but slow, change. They can not be mitigated by smoothing using long observation time, because the effects of BDS multipath errors on static baseline solutions could reach the centimeter level in a strong multipath environment.
出处
《大地测量与地球动力学》
CSCD
北大核心
2016年第10期874-878,共5页
Journal of Geodesy and Geodynamics
基金
中南大学研究生自主探索创新基金(2016zzts431)~~
关键词
BDS
载波相位
多路径
静态基线解
BDS
carrier phase
multipath
static baseline solution
