Determination of Mislocation Vectors to Evaluate bias at GSETT-3 primary stations
Determination of Mislocation Vectors to Evaluate bias at GSETT-3 primary stations
复制标题
确定错位向量以评估 GSETT-3 主站的偏差
DOI：
10.1023/a:1009823825899
复制
发表时间：
1999
影响因子：
1.6
通讯作者：
Urs Kradolfer
中科院分区：
文献类型：
--
作者：
K. Koch;Urs Kradolfer
使用的数据库提供的审查事件公告（REBs）的科学专家组技术测试-3（GSETT-3）的实验的前2.5年，我们编制了两个阵列的错位矢量和选择的三个组成部分站的主要网络从公布的慢度和方位角信息，通过f-k和极化分析。施加限制，如最小信噪比（SNR）和数量的定义阶段，我们的目标是消除位置偏差的震源参数从REBs。从14个阵列的孔径从约1公里到超过20公里的结果，以及从18个三分量站，这表明在许多情况下，错位矢量可以大大提高定位精度。如果这些错位矢量被编译以提供慢度域的足够部分的覆盖，则这些经验校正可以在定位处理之前容易地应用。在《全面禁止核试验条约》（《全面禁试条约》）的背景下，这些定位错误模式对于提供可疑低级别事件的准确事件定位可能至关重要，因为这些定位参数将用于确定进行现场视察的区域。
Using the database provided by the Reviewed Event Bulletins (REBs) for the first 2.5 years of the Group of Scientific Experts Technical Test-3 (GSETT-3) experiment, we compiled mislocation vectors for both arrays and selected three-component stations of the primary network from the published slowness and azimuth information gained through f-k- and polarization analysis. Imposing constraints such as a minimum signal-to-noise ratio (SNR) and number of defining phases, we aim at eliminating location bias as the hypocentral parameters are taken from the REBs. Results from 14 arrays with apertures from about 1 km to more than 20 km are presented as well as from 18 three-component stations, which indicate that the mislocation vectors in many cases can improve location accuracy considerably. If these mislocation vectors are compiled to provide coverage of a sufficient portion of the slowness domain these empirical corrections can easily be applied prior to location processing. In the context of the Comprehensive Nuclear Test-Ban Treaty (CTBT), these mislocation patterns could be essential for providing accurate event location of suspicious low-magnitude events, as these location parameters will be used to pinpoint the area where to conduct an on-site inspection.