摘要
当卫星被测站周围的障碍物遮挡,接收机仅接收到该卫星经过衍射或反射信号,而没有接收到直射信号时,GPS测量结果将含有较大的误差,本文称之为单一衍射或反射误差。经分析,这种误差对载波相位测量最大可达1个波长。为了消除这种误差的影响,本文提出了基于测站环境建模的卫星剔除法,通过野外实际测量的结果表明,该方法能有效地消除单一衍射或反射信号误差的影响。
When the direct line of sight between the GPS satellite and the antenna is obstructed, however the receiver can still recive the reflected or diffracted signal, it will produce a serious error in GPS positioning. This error is called as single reflected or diffracted signal error and it is possible to reach 1 wave length of carrier phase. In order to eliminate this error, a deleting satellite method is introduced here. Several experiments show that this method can eliminate this single reflected or difracted signal error effectively.
出处
《工程勘察》
CSCD
北大核心
2006年第5期45-49,共5页
Geotechnical Investigation & Surveying
基金
国家自然科学基金项目资助(40574003)
关键词
GPS
衍射
变形监测
GPS
diffraction
deformation monitoring
