Brett,

Thanks so much for the reference to this 206 page "book"!  It does indeed
"stretch" the vertical
problems and ~ complicated resolutions.

In short; do you have more (~ reserved) web references to other instruments
in your possession,
you may wish to feed our knowledge base or imagination?

Meredith

On Sun, Feb 13, 2011 at 6:25 PM, Brett Nordgren wro=
te:

> Randall and Meredith,
>
> Here's a link to Jos=E9 Otero's dissertation which describes in great det=
ail
> the feedback-less optical design, the 'iSTS-1'.
>
> "Development and Characterization of an Observatory-class, Broadband,
> Non-Fedback, Leaf-Spring Interferometric Seismometer"
> http://proquest.umi.com/pqdlink?did=3D1855874141&Fmt=3D6&VType=3DPQD&VIns=
t=3DPROD&RQT=3D309&VName=3DPQD&TS=3D1297644594&clientId=3D79356(23MB)
>
> Incidentally, in there is the experiment you (Randall) were wanting someo=
ne
> to perform to characterize anelastic effects in a seismometer spring.
>
> Interesting design, which to some degree confirms my contention that maki=
ng
> a feedback design perform well is way easier.
>
> A less-detailed paper on the instrument is in the BSSA  v100, n2, p598.
> In speaking with one of the authors it was clear to me that its temperatu=
re
> sensitivity is such that it would need to go into a deep, temperature
> stable, borehole.  However, that is facilitated by the fact that it has n=
o
> electronics at the sensor, with the displacement signal able to be record=
ed
> at the surface via optical fibers.
>
> Regards,
> Brett
>
>
> At 11:19 PM 2/12/2011, you wrote:
>
>> Meredith,
>>   The instrument at the URL you indicate looks like a vertical
>> seismometer.  In Jon's email
>> to me I understood him to be talking about a horizontal one, since it wa=
s
>> in the context
>> of the tutorial I had written.  Incidently, I know his name doesn't have
>> an h in it, and
>> I mistyped Brent for Brett.  Am having trouble with 'fat fingers' on the
>> little virtual
>> keyboard of this
>> Droid-x.__________________________________________________________
>>
>> 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.
>>
>
>
> __________________________________________________________
>
> 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.
>
Brett,=A0

Thanks so much for the reference to this 206 p=
age "book"! =A0It does indeed "stretch" the verticalproblems and ~ complicated resolutions.

In short=
; do you have more (~ reserved) web references to other=A0instruments in yo=
ur=A0possession,
you may=A0wish to feed our knowledge base or imagination?
Meredith

On Sun, Feb 13, 201=
1 at 6:25 PM, Brett Nordgren <brett3nt@.............> wrote:

Randall and Meredith,



Here's a link to Jos=E9 Otero's dissertation which describes in gre=
at detail the feedback-less optical design, the 'iSTS-1'.



"Development and Characterization of an Observatory-class, Broadband, =
Non-Fedback, Leaf-Spring Interferometric Seismometer" http://proquest.umi.com/pqdlink?did=3D18558741=
41&Fmt=3D6&VType=3DPQD&VInst=3DPROD&RQT=3D309&VName=3DP=
QD&TS=3D1297644594&clientId=3D79356 (23MB)




Incidentally, in there is the experiment you (Randall) were wanting someone=
 to perform to characterize anelastic effects in a seismometer spring.



Interesting design, which to some degree confirms my contention that making=
 a feedback design perform well is way easier.



A less-detailed paper on the instrument is in the BSSA =A0v100, n2, p598. =
=A0 In speaking with one of the authors it was clear to me that its tempera=
ture sensitivity is such that it would need to go into a deep, temperature =
stable, borehole. =A0However, that is facilitated by the fact that it has n=
o electronics at the sensor, with the displacement signal able to be record=
ed at the surface via optical fibers.




Regards,

Brett




At 11:19 PM 2/12/2011, you wrote:


Meredith,

 =A0 The instrument at the URL you indicate looks like a vertical seismomet=
er. =A0In Jon's email

to me I understood him to be talking about a horizontal one, since it was i=
n the context

of the tutorial I had written. =A0Incidently, I know his name doesn't h=
ave an h in it, and

I mistyped Brent for Brett. =A0Am having trouble with 'fat fingers'=
 on the little virtual

keyboard of this Droid-x.__________________________________________________=
________



Public Seismic Network Mailing List (PSNLIST)



To leave this list email PSNLIST-REQUEST@.............. with

the body of the message (first line only): unsubscribe

See h=
ttp://www.seismicnet.com/maillist.html for more information.






__________________________________________________________



Public Seismic Network Mailing List (PSNLIST)



To leave this list email PSNLIST-REQUEST@.............. with the body of the m=
essage (first line only): unsubscribe

See h=
ttp://www.seismicnet.com/maillist.html for more information.