以丽江地震台为例研究潮汐观测仪器格值变化检测及格值归化方法  

Method of Scale Change Detection and Scale Calibration Illustrated by the Case of Tide Observation Instrument at Lijiang Seismic Station

作　　者：闫伟[1] 陈国琴[1] 杨跃文[2] 王栋梁[1] 

机构地区：[1]中国地震台网中心,北京100045 [2]云南省地震局丽江地震台,云南丽江674100

出　　处：《地震研究》2015年第4期613-616,698,共4页Journal of Seismological Research

基　　金：中国地震局监测预报司2015年度震情跟踪定向工作任务(2015020201)资助

摘　　要：针对形变固体潮汐类观测数据,提出了一种新的检测仪器格值变化的方法,即潮汐因子相除法,并从理论上推导了利用此方法检测由于格值变化引起潮汐因子变化的原理,同时还提出利用格值变化时间前后M2波潮汐因子比值作为系数进行格值归化的方法。最后,结合丽江地震台水平摆实际观测数据,验证了格值变化检测和格值归化方法的可行性,并论述了在分析数据长周期趋势变化前需进行格值检测和归化的重要性。By analyzing the deformation earth tide observation data, we proposed the new method of dividing two tide factors （ calculating the rate of two tide factor） to detect the scale change of instrument. Then we deduced the principle of detecting the tide factor change induced by the scale change by the new method in theory. We also put forward the method of scale calibration, that is the ratio of M2 tide factor before and after scale value change was taken as the coefficient to correct the scale. Finally, combing with the observation data of horizontal pendulum at Lijiang Seismic Station, we verified the feasible of the scale detection method and scale calibration method, and elaborated the importance of the scale detecting and calibration before analyzing the long-period trend changes of the data.

关 键 词：格值变化检测 格值归化 潮汐因子 调和分析 长周期趋势变化 

分 类 号：P315.7[天文地球—地震学]