Date: Tue, 18 Mar 2003 07:27:46
-0700

To: Bobhelenmcclure@.......

From: John or Jan Lahr <johnjan@........>

Subject: Re: Event file conversion


Hi Bob,


Thanks for making your WinDaq to PSN4 conversion program available at
this time, because I think there is

quite a bit of interest.  I put the program here:

http://jjlahr.com/science/psn/mcclure/dataq2psn/


You can always send updated versions if you make changes in the
future.


Cheers,

John




At 09:09 PM 3/17/2003, you wrote:

Hi John,


  The Rat Island M6.8 event file is attached.  Note that the P
wave excites 0.7 Hz vibrations.  I see that frequency all the
time.  I get the idea that the subsurface locally is like a bowl of
Jell-O which has a natural frequency of 0.7 Hz.  The vertical
seismometer shows much less response to this "vibration". 
I live on terminal moraine, between two bays.  Bedrock is about 300
feet down.  The LDEO Palisades site doesn't seem to have this
problem.  They are close to, if not on, bedrock.  You know
better than I do about that.


  As the day has worn on, I have tested all the functions of
HeadpikV2, and everything seems to work, so I am attaching a zip file
containing the exe, the source code, the operating instructions, and
today's event files (both the WDQ and PSN formats).  I am surely
pleased that now I can use all the features and universality of WinQuake,
and still stick to recording and period-extending filtering with my Dataq
devices and software.  I may eventually add an "ini" file
to the program, where the use can enter his coordinates, the input
direction for each channel, channel name, sensor name, and sensor
properties, so that all that doesn't have to be hand-entered everytime
one wants to create a Winquake file.  In fact, it is set up for
velocity data, and the user of this program can't change that without
modifying the source code.  An "ini" file could overcome
that handicap, as well as some others.


Regards,


Bob