用JOPENS-MSDP地震分析软件提供的Hyposat、Hyp2000、Locsat和单纯型定位算法，分析一次网内和一次网缘爆破试验事件，将测定结果与GPS实测爆破位置进行对比。结果表明：4种方法的测定结果，水平方向误差均达到1类要求，垂直方向误差较大；使用区域走时模型时，Hyposat定位方法测定的网内和网缘事件的水平误差均小于1 km，爆破时间存在0.5 s左右的误差。155万多组随机台站组合的定位结果，进一步证实：①Hyposat最稳定，具体表现为相同台站布局下，Hyposat定位结果水平向置信度最高；在同一置信区间内，相同精度要求下，Hyposat容许的最大空隙角上限最大；②Hyp2000最不稳定，在台站布局好时可信度较高，但随着台站布局变差其结果快速变得最不可靠；③Locsat和单纯型水平向介于二者之间，垂直向明显较差；④在90%的置信区间下，4种方法的定位结果达到1类、2类和3类精度要求的最大空隙角上限不相同。
Based on the Hyposat, Hyp2000, Locsat and simple location algorithm provided by the seismic analysis software——JOPENS-MSDP, an intra seismic network explosion event and an explosion event near the boundary of seismic network are analyzed, and the results are compared with the positions measured by GPS. The test results show that the horizontal errors for the location results of the four methods can reached class 1 accuracy, but the vertical errors are much bigger. Using the regional travel time model, the horizontal errors of the internal and marginal network events located by the Hyposat are less than 1 km, and the original time errors of explosions are about 0.5 s. Through the analysis on location results of more than 155 million random station distribution, it can conclude that Hyposat is the most stable. The horizontal results of Hyposat with the same station distribution have the highest level of confidence. With the same confidence interval and precision requirement, Hyposat allows the maximum station gap, and the results of Hyp2000 are the most unstable. When the station distribution is good, the reliability of the Hyp2000 results is relatively high. However, when the station distribution becomes bad, the Hyp2000 results become unreliable. The horizontal errors of Locsat and simple are in middle, and the vertical errors are obviously worse. The tests also reveal that, under the confidence interval of 90%, if the results of the four methods can reach 1, 2, and 3 class of location accuracy, the maximum station gap for location is different.
2018,39(4): 78-87 收稿日期：2018-01-22
DOI：10.3969/j.issn.1003-3246.2018.04.010
基金项目：地震行业科研专项"全国统一编目系统及其相关体系研制"（项目编号：201308008）
作者简介：杨选(1978-),男,工程师,主要从事地震观测研究工作。E-mail:27960687@qq.com
参考文献：
陈贵美,杨选,刘锦.广东数字地震台网"十五"系统的几种地震定位方法的定位效果分析[J].华南地震,2009,29(1):69-78.
管勇,吴朋,马付红.地震台站空隙角对地震定位精度的影响[J].地震地磁观测与研究,2017,38(3):53-59.
黄文辉,吕作勇,康英,等.人工爆破检验区域地震台网地震定位精度[J].地震地磁观测与研究,2017,38(2):77-80.
李桂华,刘国华,王力平,等.应用爆破检验KM-n程序定位精度的研究[J].地震研究,2006,29(4):355-359.
吕作勇,杨传成,房立华.广东地震台网近震定位精度的经验性 GT 准则[J].震灾防御技术,2014,9(Z1):657-664.
王平,狄秀玲,李少睿,等.用爆破事件检验区域数字地震台网常规地震定位方法的定位精度[J].地震地磁观测与研究,2006,27(3):25-28.
张炳,汪贵章,戚浩,等. Hyp2000与单纯形定位方法对比及作为速报算法的可行性分析[J].地震地磁观测与研究,2012,33(5/6):13-17.
中国地震局. DB/T 66-2016地震编目规范[S].北京:中国地震局,2017.
中国地震局监测预报司.数字地震观测技术[M].北京:地震出版社,2003:494.
