基于S变换的高频全球导航卫星系统同震数据的震相识别研究 |
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引用本文: | 王杰民,殷海涛.基于S变换的高频全球导航卫星系统同震数据的震相识别研究[J].地震学报,2018,40(6):753-759. |
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作者姓名: | 王杰民 殷海涛 |
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作者单位: | 中国济南 250014 山东省地震局 |
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基金项目: | 山东省自然科学基金(ZR2017LD009)和地震科技星火计划(XH17019)联合资助 |
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摘 要: | 为研究高频全球导航卫星系统(GNSS)信号的P波和S波到时,本文利用2008年汶川MS8.0地震震时部分站点记录到的1 Hz高频GNSS数据,采用广义S变换将同震信号进行二维时频域平面分解,以此对P波和S波到时进行识别。本文通过调整广义S变换中的调节因子λa和p得出,当λa=1.05,p=1.05时,变换所得图像中的P波和S波到时均较为明显。结果表明,S变换在高频GNSS震相识别中效果明显,可作为GNSS地震学应用中一项有效的技术手段。
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关 键 词: | 高频GNSS S变换 到时 震相识别 |
收稿时间: | 2018-03-04 |
Seismic phase recognition of coseismic data from high-rate GNSS based on S transform |
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Institution: | Shandong Earthquake Agency,Jinan 250014,China |
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Abstract: | The high-rate GNSS data recorded by some stations during the 2008 Wenchuan MS8.0 earthquake was used in this paper to identify the arrive time of P-wave and S-wave in 1 Hzhigh-rate GNSS. Coseismic signals are decomposed in two-dimensional time-frequency domain using generalized S transform. The adjustment factors λa=1.05, p=1.05 is used to identify the arrival times of P-wave and S-wave, which could get a better result. The S transform is effec-tive and feasible in the high-rate GNSS seismic phase recognition. |
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