Contents

• Contents
• Overview
• Basic Theory
  • The complex notation
  • The Laplace transformation
  • The Fourier transformation
  • The impulse response
  • The convolution theorem
  • Specifying a system
  • The transfer function of a WWSSN-LP seismograph
  • The mechanical pendulum
  • Transfer functions of mechanical and electromagnetic seismometers
• Design of seismic sensors
  • Pendulum-type seismometers
  • Decreasing the restoring force
  • Sensitivity of horizontal seismometers to tilt
  • Direct effects of barometric pressure
  • Effects of temperature
  • The homogeneous triaxial arrangement
  • Electromagnetic velocity sensing and damping
  • Electronic displacement sensing
• Force-balance accelerometers and seismometers
  • The force-balance principle
  • Force-balance accelerometers
  • Velocity broadband seismometers
  • Other methods of bandwidth extension
• Seismic noise. Site selection. Installation.
  • The USGS Low-Noise Model
  • Site selection
  • Seismometer installation
  • Magnetic shielding
• Instrumental self-noise
  • Electromagnetic short-period seismographs
  • Force-balance seismometers
  • Transient disturbances
• Calibration
  • Electrical and mechanical calibration
  • General conditions
  • Calibration of geophones
  • Calibration with sinewaves
  • Step response and weight-lift test
  • Calibration with arbitrary signals
  • Calibration against a reference sensor
  • Calibration of triaxial seismometers
• Procedures for the mechanical calibration
  • Calibration on a shake table
  • Calibration by stepwise motion
  • Calibration with tilt
• Free Software
• Acknowledgments
• Bibliography

A postscript version of this manuscript can be downloaded from ftp.geophys.uni-stuttgart.de (141.58.73.149), name: ftp, password: your e-mail address, file: pub/ew/postscripts/manual.ps

A MS-Word version is available as pub/ew/Man2001/MSOPch5.doc

There is a later version posted here:  NMSOP_06.doc

ftp ftp.geophys.uni-stuttgart.de
user ftp
password: your e-mail address
cd pub/ew/Man2001/
binary
get MSOPch5.doc
exit

Original figures in various formats are found in /pub/ew/Man2001/Fig2

Citations in the text may contain grammatically redundant parentheses. Their purpose is to have citations decently treated by text format converters.

This LaTeX version differs slightly from the MS-Word version submitted as Chapter 5 of the new MSOP.