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利用第三阶段科学专家组技术试验(GSETT-3)前两年半的《复查事件公报》(REB)提供的数据库,从发表的由 f-k 和极化分析得到的慢度和方位角的信息中,我们编辑了基本台网中的台阵和从中选出的三分向台站的定位误差矢量。通过使用约束条件,比如最小信噪比(SNR)和定义震相的数目,我们试图减小《复查事件公报》中震源参数的定位偏差。给出了14个孔径从约1千米到20多公里的台阵和18个三分向台站的结果,这些结果表明,在许多情况下,定位误差矢量都能显著地改善定位精度。假如这些定位误差矢量被收集来并在慢度域有足够大的覆盖,那么这些经验校正就能够很容易地在定位处理之前得以应用。在全面禁止核试验条约的范畴里,这些定位误差模式对于提供可疑的低震级事件的准确位置是很重要的,因为这些定位参数将被用来指示需要进行现场调查的地区。
Using the database provided by the Review Events Bulletin (REB) two and a half years before the Phase III Scientific Expert Group Technical Experiment (GSETT-3), from published published information on slowness and azimuth from fk and polarization analysis , We edited the array of positioning errors in the basic station network and the three-point station selected from them. By using constraints such as the minimum signal-to-noise ratio (SNR) and the number of phases defined, we attempted to reduce the positional deviation of the source parameters in the Review Events Bulletin. The results of 14 arrays and 18 trishated stations with apertures of about 1 km to 20 km are shown. These results show that in many cases, the positioning error vector can significantly improve the positioning accuracy. If these positioning error vectors are collected and have sufficiently large coverage in the slowness domain, these empirical corrections can be easily applied before the positioning process. In the context of the Comprehensive Nuclear-Test-Ban Treaty, these patterns of positioning errors are important for providing an accurate location for suspicious low-magnitude events because they will be used to indicate the areas where on-site investigations are required.