Add tutorials for seismograph

[core-man]

• Introduction
• Metadata Formats
• Instrument Response

References:

• https://migg-ntu.github.io/SeisTomo_Tutorials/seismology/seismic-station/index.html#seismograph

[wew053]

地震仪的原理？

[core-man]

地震仪的原理？

Do you mean this？

https://migg-ntu.github.io/SeisTomo_Tutorials/seismology/seismic-station/index.html

[wew053]

还不够，我给别人上课讲过怎么样从地震仪，到sac头文件

[core-man]

还不够，我给别人上课讲过怎么样从地震仪，到sac头文件

This tutorial is for new babies in Seismology. I think what you want to write is actually one chapter in the seismology reference (https://github.com/seismo-learn/seismology).

See https://github.com/seismo-learn/maintenance/issues/13