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6 1 7 8 2003 9 6 : 23 ;=<6 2 7 8 2004 9 6 : 28 ;=<1. Seismic Analysis CodeSAC (Seismic Analysis Code) is a general purpose interactive program designed for the study ofsequential signals, especially timeseries data. Emphasis has been placed on analysis tools used byresearch seismologists in the detailed study of seismic events. Analysis capabilities include generalarithmetic operations, Fourier transforms, three spectral estimation techniques, IIR and FIR filtering,
signal stacking, decimation, interpolation, correlation, and seismic phase picking. SAC also contains an
extensive graphics capability.
SAC
Lawrence Livermore National Laboratory (LLNL)
SAC>@?

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sRtluwv]L_C f^gdiE
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_Ð^{_] q5oÑA¼ÒhÓCÔ5xEÕRÖ
F×HAbÙCÚ-]oÛ xÜF=HÝfEáÃË hâL k ]Yã Þ ]EßRUAàähåÊæEç è æ È ªWéhêPf_g^ibëÊìk_í xhyNîðï ç ª ÇUñóòwà[x ÞEô ] æbJ ç o æ j B5 ] Ýí C_õRJ Þ ]bßlCöJ pP÷ òYS-x-F¼âE k¼ø â¨î Þ A pP÷ òYSùCF{_úûC ik ]ã bpC÷» ù×Ü ý_þd]
plr VRèü «ÿòCËlSNÏRk] pWr Vwp[è÷ ü « J ¡]òPSN]bÎ NJ]NyU¼x  ´F  ¯ ù¼G Î x Ë[iYÝ   J j x Ë zC{C i ] fwk5í ÃA xÊFJÏ^ëhËW]ã{où  Ë  ]wÇ dü «2j    ~¼dH 5A [^H L]^x ËiE
SAC

()

SAC

A

bd x (begindevices xwindows)

X Window System

X Window System

UNIX, Linuxbd sgf (begindevices sgf)

SGF

SGF SAC Graphic Filef001.sgf

SACf+

binary+ .sgfqdp off
qdp

Quick and Dirty Plotqdp

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7ij7kl» A-mGîon ]
]RH5h #4$ x%&5(*)[© 8lï_V!
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n# $ 'x & ()d*© 8PïRV !_HA pr (read)SAC

r example ew.sacr example ew.sac example ns.sac example ud.sacw (write)w output.sacalphaw alpha output.alphap (plot)

plot
single-trace, single-window

11p1 (plot1)

plot
multi-trace, multi-window

p2 (plot2)

1

plot
multi-trace, single-window

xlimx

fft

xlim 0 10

fft

FFT

psp am (plotsp am)

am

psp

loglin, linlog, linlin

rmeanrtrend

int

dif

2

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c 1.5ÝË ù9_-À ì dH5qV=_V\ 2 xy5î k #4$ n x & (*)d©8lï^V/!wx%r^ò*q ªp çS!RA ë ;hiEhighpass c (highpass corner)c 1.5

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û_R .dyb
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Ë ù
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c 1.5 7sc (systemcommand)
SAC

UNIX

sc lsSAC

scSAC

UNIXSACscsgftops

SAC
SGF
SAC

SAC
sgftops f001.sgf f001.ps
sc sgftops f001.sgf f001.ps

PostScript

X Window System
sac SACSAC

SACAUX/usr/local/sac/aux

SAC

onaga% setenv SACAUX /usr/local/sac/aux
onaga% sac
SEISMIC ANALYSIS CODE [August 11, 1992 (Version 10.6f)]
Copyright 1992 Regents of the University of California
SAC>

xyz.sacù¼Gµï^V!C] p[÷ òCS j[g zCH ìkUí UA& ()5(ÃAßCGF×{ i xwJù½w".dyI SAC> bd x
SAC> qdp off
SAC> r xyz.sac
SAC> p
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1

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SAC> pùj Ñ iRì í ù  iRí Ãj5Cë- f iEd5zlí H_© p^÷ A-"Ã~o k Ë=f P.
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A=UzP{
ùoa*bR^. kÇ n ! f*4 lÓ Ëhph÷ òPSÊA i_í ù jRfhiLquit

SAClsf001.sgf

sgftopsonaga% sgftops f001.sgf f001.ps

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]4*ÃxùEAH GF={i_í ù  âwH dk  a 2A-| á FI{ ëèì xA
onaga

login

X Window System

mycomp% xhost onaga.eri.u-tokyo.ac.jp

onaga

login

login

DISPLAYùo"C i_í ù  « H58F ;-k²µs® ;PwË  °±  V/!P] k gdi #LòÊ f jdph÷ òt æ r VPSÊi^xdí yÃî fwË ] q³¨ü A-´èù xwJ Þ à7¶-]Bph·_÷  PUiRAí ß_~?f  [iE ùJ* j ßR f"PË B  f  kxdy5î S[] òPSÊA ùJonaga% setenv DISPLAY mycomp.mydomain.ac.jp:0

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ApPr V_ü « ] p^÷ òlSÊAR ¿ V ê4A V >@? ]lïRV ! plr VRèü « x ² iHA Vk à¶ p_÷ òWSÃA&5(HAÀNÁ5x=F{)d© f%A | á i Ç DF ê A l y à ¶dÇ 7D5F ê -A | á F={ Â%] ÃÄ Bª A:C « SUA%Åhy 

1. onaga/usr/local/sac/data

SACkob.an

2. SAC
http://www.llnl.gov/sac/SAC Manuals/FileFormatPt1.html
FFTC
3.

0 10 Hz

4SAC

ALPHA

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S ù¼à7¶N]4Æ*ÇùoÈ Éoy
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4. SACfft, plotsp am linlin

PostScript

PDF

SAC

é âHú û ü ý:þÿç Ö

731FFTâ5ãÝPäWord, LaTeX
koketsu@eri.u-tokyo.ac.jp

CLawrence Livermore National Laboratory, http://www.llnl.gov/sac/SAC Home Main.html (2000).

 , http://www-seis.planet.sci.kobe-u.ac.jp/ kakehi/sac/command list (1999).

5ASAC  !

6

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