Transfer functions, system responses and calibration headers
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Transfer functions, system responses and calibration headers
, IG ASCR Prague
I. Review of fundamentals of system and signal theory for
observatory seismologists.
Laplace transform, z-transform. important theorems/correspondences;
transfer functions, poles/zeros, frequency responses, impulse responses,
minimum phase systems; IIR and FIR filters; causal and acausal filtering,
simulation and restitution.
II. Principles of offered seismic waveform and calibration
data analysis and processing software (introduction to demonstration).
- Automated seismic signal preprocessing (editing, filtering,
simulation, restitution) by PREPROC [1, 2]
- Determinatioon of seismograph system transfer functions by inversion of
transient and steady-state calibration responses
(Programs UNICALT and UNICALF) [3]
- Check of calibration headers and plotting of steady-state and transient
responses in MATLAB 4.2 [4]
References
[1] A. Plesinger, M.Zmeskal, J. Zednik: Automated Preprocessing of
Digital Seismograms - Principles and Software, ed. E. Bergman,
Prague-Golden, 1996, 173 pp.
[2] M. Zmeskal: PREPROC Library - Programmers Guide, Prague
1996, 44 pp.
[3] A. Plesinger: Determination of seismograph system transfer
functions by inversion of transient and steady-state calibration
responses. Studia Geophys. et Geod., 42 (1998), 472-499.
[4] MATLAB scripts unires.m and spec.m
with external programs get_gse, get_resspec.
software and documentation available.
Presently these lecture notes consist of a set of overheads in
complete postscript series (compressed tar format) or
individual postscript files (uncompressed).
The
PREPROC and related software (Automated Preprocessing of
Digital Seismograms) is available for different platforms.
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