Example Analysis of Station Waveform Data Packet of National Seismic Intensity Rapid Reporting and Early Warning Project
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摘要: 国家地震烈度速报与预警工程项目对台站数据包格式采用了新的定义，原有地震波形分析计算软件无法直接处理预警项目产出的数据包，为解决这个问题，本文通过一组实际采集的十六进制数据，对该数据包新变化及定义，以图表形式详细解析了“wc”连续波形数据包中固定头段区、可变头段区和数据区等组成部分的关键字节内容及其逻辑关系，指出数据区Steim2的解压算法本质是将32 bit数据有效拆分为差值时间序列后重新还原数据的过程，并利用C语言给出解析“wc”连续波形数据包的可操作方案。Abstract: The National Seismic Intensity Rapid Reporting and Early Warning Project adopted a new definition of station data packet format, the original seismic waveform analysis and calculation software cannot directly process the data packet produced by the early warning project, in order to solve this problem, through a group of hexadecimal data in the form of charts, this paper analyzed the new changes and definitions of the data packet, the key byte contents of each part and their logical relations in the fixed header area, variable header area and data area. In particular, it points out that the decompression algorithm of the data section Steim2 is actually the process of effectively splitting the 32 bit data into the difference time series and restoring the data. Finally, using C language to give the actual operable scheme of parsing "wc" continuous waveform packet.
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Key words:
- Early warning project /
- miniSEED /
- Steim2 /
- Data splitting
1) 2北京港震机电有限责任公司，童汪练，2017. 数字地震仪参数测定软件使用手册，北京港震机电有限责任公司资料. -
图 4 W0和W6数据解析及新合成的W6数据表
Figure 4. W0 and W6 data analysis and newly synthesized W6 data
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