GPS高精度重复测量中的天线相位中心偏差检测及改正  

GPS ANTENNA PHASE CENTER CHECKING AND ADJUSTING IN THE REPEATED OBSERVATIONS

作　　者：王雄[1] 王建华[1] 胡亚轩[1] 赵永年[1] 

机构地区：[1]中国地震局第二监测中心,陕西西安710054

出　　处：《内陆地震》2010年第1期31-36,共6页Inland Earthquake

基　　金：地震科学基金(A07132)资助

摘　　要：首先通过GPS接收机在超短基线上检测数据计算天线相位中心偏差，然后对民乐跨断层综合观测场地2007—2008年的GPS点位速率进行校正。从计算结果可知，所用GPS天线相位中心偏差多在亚毫米级。对于距离在几千米的点位，由于各期观测所用天线的不同，使得相位中心的偏差对水平运动速率的影响多在亚毫米级；若各期观测所用天线相同，则影响多在10^-2毫米量级。对高精度GPS观测来说，多期观测尽可能采用同一天线。In this paper, the antenna phase center deviation is calculated firstly through the ultra- short baseline surveying by the GPS receiver; Then the rates of GPS sites during 2007 -2008 is adjusted in Minle cross-fault profile. The results show the value of the GPS antenna phase center devi- ation is sub-millimeter. For the sites between several kilometers in the distance, if they are observed with different antenna in several periods, the deviation of the horizontal rates will be in sub-millimeter for the antenna phase center deviation; or, the deviation will only be 10-2 millimeter. For precision GPS observation, the same antenna is used as many as possible in the repeated observations.

关 键 词：GPS测量 天线相位中心偏差 地壳形变 水平运动速率 多期观测 

分 类 号：P315.72[天文地球—地震学]