I depend indirectly on WWVB via an "atomic" wall clock for timing. I use a 
DI-194 Dataq A/D for data recording. This device allows event marks to be 
placed on the recorded data, and I use the clock to pick off minute marks. I am 
very satisfied with my setup, but I do not know if it could be readily adapted 
to WinSDR. Please take a look at:

  http://www.jclahr.com/science/psn/mcclure/timing/index.html

and tell me what you think.

  I avoid the time delay distortion normally encountered with filtering by 
using my application called "WQFilter.exe", which uses low-pass filters of my 
own design. These filters are applied both forward and backward in time. They 
therefore do not work in real time, but are useful in preparing WinQuake event 
files.

  This application can be downloaded from 

  http://www.jclahr.com/science/psn/mcclure/wdq_utilities/index.html

  It is contained in the ZIP file "seismic_dataq.zip". It works with PSN Type 
4 files. It also has a filter which digitally extends the long period 
response of my  sensors, which have natural periods of only 6, 8, and 13 seconds, 
respectively. I use it to prepare all my event files from station REM, Locust 
Valley, NY. My prepared waveforms compare very closely with those from the nearby 
LDEO station PAL. Real-time and archival drum plots from PAL can be seen at:

  http://www.ldeo.columbia.edu/cgi-bin/LCSN/WebSeis/24hr_heli.pl?id=

Regards,

Bob McClure
  I depend indirectly on WWVB=20=
via an "atomic" wall clock for timing. I use a DI-194 Dataq A/D for data rec=
ording. This device allows event marks to be placed on the recorded data, an=
d I use the clock to pick off minute marks. I am very satisfied with my setu=
p, but I do not know if it could be readily adapted to WinSDR. Please take a=
 look at:



  http://www.jclahr.com/science/psn/mcclure/timing/index.html



and tell me what you think.



  I avoid the time delay distortion normally encountered with filtering=
 by using my application called "WQFilter.exe", which uses low-pass filters=20=
of my own design. These filters are applied both forward and backward in tim=
e. They therefore do not work in real time, but are useful in preparing WinQ=
uake event files.



  This application can be downloaded from 



  http://www.jclahr.com/science/psn/mcclure/wdq_utilities/index.html


  It is contained in the ZIP file "seismic_dataq.zip". It works with PS=
N Type 4 files. It also has a filter which digitally extends the long period=
 response of my  sensors, which have natural periods of only 6, 8, and=20=
13 seconds, respectively. I use it to prepare all my event files from statio=
n REM, Locust Valley, NY. My prepared waveforms compare very closely with th=
ose from the nearby LDEO station PAL. Real-time and archival drum plots from=
 PAL can be seen at:



  http://www.ldeo.columbia.edu/cgi-bin/LCSN/WebSeis/24hr_heli.pl?id=3D<=
BR>


Regards,



Bob McClure