Barry,

If you haven't already, you may want to look at some of my data on 
http://bnordgren.org/seismo/

In particular, the files  'loop3.pdf', 'lpmeas2.pdf', and probably some others.
If you can provide some more details, I'll be happy to try to help.

Regards
Brett



At 07:26 PM 3/2/2006 -0800, you wrote:
>Hi All
>    I have constructed 3 long period seismographs which used info from 
> STM's web site. They work well. What isn't working well is duplicating 
> STM's equation results for the sensors response. I have tried my DOS 
> version of mathcad and have just created the equations in Excel. I get 
> the same results with both. However they differ from that  STM got and 
> also Al Coleman. I have been able to duplicate most of their results 
> except for the response slope at both ends of the velocity graph, 
> especially at the low end. My graphs drop off too dramatically. Has 
> anyone run the equations and duplicated STM's results with his 
> seismograph characteristics? I am an engineer and understand equations. I 
> suppose that I'm not reproducing some subtle portion of the equations, 
> though I have stared at them for days.
>Regards
>Barry
>

                  If my e-mail address above is not working
you can always reach my mail form at: http://bnordgren.org/contactB.html
                            using your Web browser.


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