麻城台应变潮汐观测资料质量评定与稳定性分析

QUALITY EVALUATION AND STABILITY ANALYSIS OF STRAIN TIDAL OBSERVATION AT MACHENG STATION

对麻城台2001—2010年的应变潮汐观测资料质量进行全面评定,结果表明:10年来麻城台应变潮汐观测资料的连续率、年零漂、年变幅、M2波潮汐因子及相对中误差、相对噪声水平五项评定指标均达到了国内优秀水平,且仪器运行正常稳定。麻城台应变潮汐长系列调和分析结果为地球动力学研究提供了真实可靠的长周期观测数据,为本区域固体潮正常背景变化及前兆异常信息识别提供了参考实例。

Strain tidal observation data at Macheng station from 2001 to 2010 were applied to conduct a corn- prehensive quality assessment and long-term stability. Results showed that strain tide observation data of Macheng station during 10 years were continuous, complete, reliable and equipments kept stable. Data integrity rate was high, zero drift of years and annual variation were small, precision of strain tide observation was high and the rela- tively noise level was low. Five evaluation indicators had reached the domestic leading level that were data continu- ous rate, zero drift of years, annual variation, tide factor of M2 wave, and relative error and noise level. The re- sults could provide long-term and reliable data for geodynamics, and also provide a reference instance for the varia- tion information of solid tidal background and identification on precursory anomalies.