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首页> 外文期刊>Seismological research letters >Connecting a Quanterra Data Logger Q330 on the GWR C021 Superconducting Gravimeter
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Connecting a Quanterra Data Logger Q330 on the GWR C021 Superconducting Gravimeter

机译:在GWR C021超导重力仪上连接Quanterra Data Logger Q330

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Below 1.5 mHz the superconducting gravimeters (SGs; Figure 1) are competitive with the best spring gravimeters and seismometers and can achieve the lowest noise level at frequencies lower than ~1.0 mHz (Van Camp 1999; Rosat et al. 2003; Widmer- Schnidrig 2003; Park et al. 2005). SGs can therefore make a significant contribution to the illumination of long-wavelength density heterogeneities in the Earth’s mantle (Widmer- Schnidrig 2003). For reasons of price and complexity, the number of SGs is small compared to the number of sensors deployed in the Global Seismic Network (GSN). However, the potential of a sparse network of gravimeters for normal-mode research has been demonstrated by the International Deployment of Accelerometers (IDA) network (Agnew et al. 1986). Another point worth noting is the stability and accuracy (~0.1% level) of the calibration factor of SGs (Francis et al. 1998) requested to validate Earth and ocean tide models using tidal gravity measurements (Baker and Bos 2003). This compares well with seismic networks, where results are barely better than 1% (http:// ida.ucsd.edu/pdf/DMSSC_2005_10.pdf ; Park et al. 2005; Davis et al. 2005). Such accuracy is quite unacceptable for geodesy.
机译:低于1.5 mHz的超导重力仪(SGs;图1)与最佳的弹簧重力仪和地震仪具有竞争性,并且在低于〜1.0 mHz的频率下可以达到最低的噪声水平(Van Camp 1999; Rosat等人2003; Widmer-Schnidrig 2003 ; Park等人,2005)。因此,SG可以为地幔中长波长密度异质性的照明做出重要贡献(Widmer-Schnidrig 2003)。出于价格和复杂性的原因,与部署在全球地震网络(GSN)中的传感器数量相比,SG的数量很少。但是,重力加速度计的稀疏网络在正常模式下的研究潜力已通过国际加速度计(IDA)网络的部署得到了证实(Agnew等,1986)。另一点值得注意的是,要求使用潮汐重力测量来验证地球和海洋潮汐模型的SGs校准因子的稳定性和准确性(〜0.1%水平)(Baker和Bos 2003)。这与地震网络相比较,后者的结果仅略高于1%(http://ida.ucsd.edu/pdf/DMSSC_2005_10.pdf;Park等人2005; Davis等人2005)。对于大地测量学来说,这样的精度是完全不能接受的。

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