Very high resolution long-baseline water-tube tiltmeter to record small signals from Earth free oscillations up to secular tilts
Very high resolution long-baseline water-tube tiltmeter to record small signals from Earth free oscillations up to secular tilts
复制标题
超高分辨率长基线水管倾斜计，用于记录从地球自由振荡到长期倾斜的小信号
DOI：
10.1063/1.1844451
复制
发表时间：
2005
影响因子：
1.6
通讯作者：
W. Zürn
中科院分区：
文献类型：
--
作者：
N. d'Oreye;W. Zürn
自1997年以来，卢森堡大公国的Walferdange地下地球动力学实验室一直在运行一个43米长的无浮子水管倾斜仪。没有活动部件使得该仪器特别简单，但并不妨碍它测量一些非常小的地球物理信号，例如具有非常有利的信噪比的地球潮汐或大地震后环绕地球仪的Love波的连续通道。它非常低的噪音水平和高分辨率，达到长周期地震带（例如分辨率优于5×10− 12 rad），也允许成功记录罕见的严重的环形和球形自由振荡的地球激发的大地震。在其安装的环境条件下（在100米深的石膏矿中），该仪器显示出高度的可靠性和非常低的漂移率（<0.005微拉德闪烁月）。分析的倾斜和水平位移传递函数计算…
A 43m long floatless water-tube tiltmeter has been in operation since 1997 at the Walferdange Underground Laboratory for Geodynamics in the Grand Duchy of Luxembourg. The absence of moving parts makes this instrument particularly simple but does not prevent it from measuring some very small geophysical signals such as the Earth tides with a very favorable signal-to-noise ratio or the successive passages of Love waves circling the globe after major Earthquakes. Its very low noise level and its high resolution up to the long-period seismic band (where for instance the resolution is better than 5×10−12rad) also allows the successful recording of rarely observed grave toroidal and spheroidal free oscillations of the Earth excited by major earthquakes. In the environmental conditions of its installation (in a gypsum mine at 100m depth), the instrument shows a high degree of reliability and a very low drift rate (<0.005microrad∕month). The analytical tilt and horizontal displacement transfer functions computed ...