同一测点多套倾斜类仪器观测资料对比分析

Comparative Analysis of Observation Data of Multiple Sets of Tilt Instruments at the Same Measuring Point

选取安装在营口地震台山洞内可视为同一测点的三套地倾斜仪器(SQ-70模拟水平摆倾斜仪、SSQ数字水平摆倾斜仪及DSQ数字水管倾斜仪)2010—2019年的观测数据,从仪器运行、潮汐参数结果及倾斜长趋势等方面进行一致性和差异性分析。结果表明:(1)从数据质量一般评定上看,三套倾斜仪完整率都在99.5%以上;DSQ和SSQ的年变幅和年零漂相对稳定;从潮汐参数分析上看,三套倾斜仪潮汐因子北南分量好于东西分量,并且更接近于理论值,潮汐因子均方差年均值在0.010至0.018之间变化,均方差m_(r)<0.02,相对噪声水平M_(1)<0.02″,符合I类倾斜台标准。总得来说,仪器稳定性和精度方面,DSQ最佳,SSQ次之,SQ-70最低;(2)从长趋势上来看,三套倾斜仪器观测结果基本是一致的,能够较好地反映监测区域大地倾斜的变化特征。

Three sets of ground tilt instruments(SQ-70 analog horizontal pendulum tilt meter,SSQ digital horizontal pendulum tilt meter and DSQ digital water pipe tilt meter)installed in the cave of Yingkou Seismic Station,which can be regarded as the same measuring point,are selected from 2010-2019 observation data,Consistency and difference analysis are carried out from the aspects of instrument operation,tidal parameter results and long-term tilt trend.The results show that:1.From the general evaluation of data quality,the integrity rates of the three sets of inclinometers are all above 99.5%;the annual amplitude and the annual zero drift of DSQ and SSQ are relatively stable;from the analysis of tide parameters,the three sets of inclinometers are tidal The north-south component of the factor is better than the east-west component,and is closer to the theoretical value.The average annual mean square error of the tide factor varies from 0.010 to 0.018,the mean square error is m_(r)<0.02,and the relative noise level M_(1)<0.02",which meets the standard of class I tilting platform In general,in terms of instrument stability and accuracy,DSQ is the best,SSQ is the second,and SQ-70 is the lowest.2.From the long-term trend,the observation results of the three sets of tilt instruments are basically the same,which can better reflect the monitoring area.The changing characteristics of the tilt of the earth.