The material quoted in "Inverse filter for seismic sensors" dated  04/23/2007 
has been recently updated. Please see the latest version at
 
_http://www.jclahr.com/science/psn/mcclure/filter_examples/index.html_ 
(http://www.jclahr.com/science/psn/mcclure/filter_examples/index.html) 
 
  The period extending filter in Amaseis is now mathematically  correct. If 
you are an Amaseis user, please download the latest version at 
_http://www.geol.binghamton.edu/faculty/jones/_ 
(http://www.geol.binghamton.edu/faculty/jones/) .
 
  "WQFilter.exe" and "Heliplot.exe" are no longer in the same  download. The 
separation was made to segregate programs for WinQuake users from  programs 
for Dataq users. "WQFilter.exe" is now included in  "winquake_utilities.zip" on 
page
 
_http://www.jclahr.com/science/psn/mcclure/sac/index.html_ 
(http://www.jclahr.com/science/psn/mcclure/sac/index.html) 
 
and "Heliplot.exe" (contained in  "seismic_dataq.zip") on  page
 
_http://www.jclahr.com/science/psn/mcclure/wdq_utilities/index.html_ 
(http://www.jclahr.com/science/psn/mcclure/wdq_utilities/index.html) 
 
  "winquake_utilities.zip" also contains "SAC_to_PSN.exe" and  
"PSN-to-WAVE.exe". "SAC_to_PSN.exe" allow you to inspect the header contents of  a SAC 
binary file, optionally convert the file to WinQuake format, listen to an  audio 
rendition of the file, and optionally save the data in audio format.  
"PSN-to-WAVE allows you to listen to an audio rendition of a  WinQuake file, and 
optionally save the data in audio format.
 
  "seismic_dataq.zip", in addition to "Heliplot.exe", contains all the  
programs you need to run a seismic station with up to four sensors using DATAQ  
Instruments data acquisition, and to convert WinDaq format event data to  
WinQuake format. Amaseis allows you to operate only one sensor. If you want to  
record and display filtered heliplots on more than one channel using Dataq  
hardware, you will need my programs.
 
  Again, I urge amateurs to download and try out "WQFilter.exe" on  their 
event files. It has a selection of highpass and lowpass filters that work  better 
than those in WinQuake, and features my period-extending filter. Its use  is 
almost indispensible if your sensor has a natural period of less than 20  
seconds. Carefully read "WQFilterHlp.txt", which is the help file for the  program.
 
Bob



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http://discover.aol.com/memed/aolcom30tour





The material quoted in "Inverse filter for seismic sensors" dated=20
04/23/2007 has been recently updated. Please see the latest version at
 
http://www.jclahr.com/science/psn/mcclure/filter_examples/index.html
 
  The period extending filter in Amaseis is now mathematicall=
y=20
correct. If you are an Amaseis user, please download the latest version at <=
A=20
href=3D"http://www.geol.binghamton.edu/faculty/jones/">http://www.geol.bingh=
amton.edu/faculty/jones/.
 
  "WQFilter.exe" and "Heliplot.exe" are no longer in the same=20
download. The separation was made to segregate programs for WinQuake users f=
rom=20
programs for Dataq users. "WQFilter.exe" is now included in=20
"winquake_utilities.zip" on page
 
http://www=
..jclahr.com/science/psn/mcclure/sac/index.html
 
and "Heliplot.exe" (contained in  "seismic_dataq.zip") on=20
page
 
=
http://www.jclahr.com/science/psn/mcclure/wdq_utilities/index.html
 
  "winquake_utilities.zip" also contains "SAC_to_PSN.exe" and=20
"PSN-to-WAVE.exe". "SAC_to_PSN.exe" allow you to inspect the header contents=
 of=20
a SAC binary file, optionally convert the file to WinQuake format, listen to=
 an=20
audio rendition of the file, and optionally save the data in audio format.=20
"PSN-to-WAVE allows you to listen to an audio rendition of a=20
WinQuake file, and optionally save the data in audio format.
 
  "seismic_dataq.zip", in addition to "Heliplot.exe", contains all=
 the=20
programs you need to run a seismic station with up to four sensors using DAT=
AQ=20
Instruments data acquisition, and to convert WinDaq format event data to=20
WinQuake format. Amaseis allows you to operate only one sensor. If you want=20=
to=20
record and display filtered heliplots on more than one channel using Da=
taq=20
hardware, you will need my programs.
 
  Again, I urge amateurs to download and try out "WQFilter.exe" on=
=20
their event files. It has a selection of highpass and lowpass filters that w=
ork=20
better than those in WinQuake, and features my period-extending filter. Its=20=
use=20
is almost indispensible if your sensor has a natural period of less than 20=20
seconds. Carefully read "WQFilterHlp.txt", which is the help file for the=20
program.
 
Bob


Get a sneak peek of the all-new AOL.com.