摘要
以固体潮汐、地球自由震荡及远震面波信号为输入,通过对比相同台站不同地倾斜仪器的响应记录,用振幅谱密度比方法分析水管仪、垂直摆、水平摆记录数据之间的差异。结果表明,水管仪与摆式仪记录的固体潮汐、地球自由震荡数据基本一致,但对于高频段远震面波的响应记录则存在较大差异。分析认为,水管仪与摆式仪的高频段性能差异以及基线长度不同导致的输入信号差异,是高频数据不一致的原因。
Earth tide, earth＇ s free oscillation and teleseismic surface wave are common signals with different frequency in premonitory data. The perormance in high frequency of DSQ tiltmeter, vs-1 vertical pendulum tiherme- ter and SQ-2I horizontal pendulum tiltermeter at the same-site were compared. The results prove that the perormance in low-frequency of Earth tide, earth＇ s free oscillation are consistent, the perormance of teleseismic surface wave are different from each others. The difference of the three tihermeters＇ response might be caused by the difference of perormance in high frequency of the instruments and different length of the base line.
出处
《大地测量与地球动力学》
CSCD
北大核心
2014年第4期175-178,共4页
Journal of Geodesy and Geodynamics
基金
云南省自然科学基金项目(2008CD220)
云南省地震局短临跟踪专项(2013JC001)
关键词
地倾斜
同台观测
谱比法
高频数据
数据差异
crustal tilt
records at same site
spectra rate
high-frequency data
difference in data
