http://www.gissky.net- GIS空间站

接收机与卫星之间的相对运动,使得多径效应存在动态特性。针对卫星轨道的不同,分析多径效应对测距误差的影响,着重讨论静止接收机接收GEO卫星信号时出现的固有多径现象,仿真分析多径信号的衰落频率对码跟踪环路的影响。仿真结果表明,当衰落频率接近或大于码环路带宽时,多径对码跟踪精度的影响会在一定程度上被滤除;不同的卫星轨道导致多径效应的动态特性存在差异,会使测距误差在时域上表现出短时快变和长时缓变两种特征。为研究多径效应产生机理与卫星轨道因素的相关性提供了验证途径。 更多还原

【Abstract】 The relative movement between the receiver and the satellite causes the dynamic effect on multipath.As to different orbits of satellites,this paper firstly analyzes the different effects of multipath to the error of pseudorange measurement.The standing multipath of static receiver is discussed especially when receiving the signals from the GEO satellites.Then influence to the code tracking loop,which is caused by fading-frequency in multipath,is simulated and analyzed in the paper.Further result... 更多还原