数字化形变台站观测资料质量跟踪分析

QUALITY TRACE AND ANALYSIS OF OBSERVATIONAL DATA OF DIGITAL DEFORMATION STATIONS

厦门地震台在“九·五”期间安装了 4套数字化形变观测仪器。应用全国形变资料评比计算方法 ,结合EIS2 0 0 0与DEFORMATION计算软件 ,对新安装的 4套仪器 2 0 0 1～ 2 0 0 2年观测资料的质量进行了跟踪分析并给出了计算结果。结果表明 :(1) 4套仪器从安装以来 ,随着观测环境与仪器的逐渐稳定以及观测人员技术熟练程度的提高 ,资料内在精度都有提高 ;(2 )海潮干扰是影响厦门台形变资料内在精度的主要因素之一。

In the ‘Ninth Five-Year Plan’period four digital deformation meters were installed at Xiamen seismic station.Adopting judge criterion and computing method for the national digital deformation data and combining with softwares EIS2000 and DEFORMATION,we have traced and analyzed inner quality of observational data recorded by these four lately installed instruments from 2001 to 2002.The results show following understandings: (1) With stability increasing of observational environment and instruments and with the inprovement of observer's skill , the inner quality precision has inproved. (2) The tide interference is one of the main causes which affects the inner precision of deformation data at Xiamen seismic station.