On 2/14/2012 11:06 AM, Marchal van Lare wrote:
> WinSdr does not muddy up the data, you can still save the raw data in
> Winquake and filter it with WQ.
>
> Marchal
>

I think Marchal meant raw data in WinSDR and filter it with WQ.

Tom Dick wrote:
> Using this new filtering ..... am I right... if you filter within WinSDR
> then you really don't need to filter within WinQuake...it muddies up the
> data....right???

If you mean the period extending filter you should only do this once, either in 
WinSDR in real-time or after the fact in WinQuake using the raw data channel from the 
sensor.

 >I had been working with this program about 4 weeks now. I am not satisfied with the 
 >results. Bob's self-standing program seems better. What participated my comments
 >was I know there was a "standard" we had with the old WinQuake filtering and what 
 >we everybody settle on.

Tom, WinSDR and WinQuake use the same code as Bob's program. The only thing I did was 
convert his Visual Basic code to C++ so I could include the filter into the programs. 
After adding the code to WQ I compared the output, sample per sample, between the two 
programs and they were identical.

 >What is this one decade? Does this mean if the pendulum frequency is .04 that I can 
 >go as low as .008?

Decade = 10 so a pendulum frequency of .04 (25 sec) could be extended to .004 (250 sec).

Regards,
Larry Cochrane
Redwood City, PSN

__________________________________________________________

Public Seismic Network Mailing List (PSNLIST)

To leave this list email PSNLIST-REQUEST@.............. with 
the body of the message (first line only): unsubscribe
See http://www.seismicnet.com/maillist.html for more information.