PSN-L Email List Message

Subject: Re: strain and tilt units
From: ChrisAtUpw@.......
Date: Sat, 28 Oct 2000 06:40:05 EDT

In a message dated 18/09/00, sean@........... writes:

> I have submitted an abstract to the AGU meeting regarding the new dynamic 
>  broadband tiltmeter that senses pure tilt but is not sensitive to 
>  acceleration as a seismometer is, so it can be used to record and
>  remove tilt noise from broadband horizontal seismic data. The current
>  resolution is 8.3 picoradians (10^-12). It readily records such earth tilt
>  noises as acoustic gravity waves (from storms) at 50 nanoradians (10^-9)
>  amplitude. (I will post the abstract on my web site later in the week.)

Dear Sean-Thomas,

    Have you managed to finalise the tiltmeter details / disclosures yet 
please? I have visited your Website several times to try to get information 
on your exciting developments, but the tiltmeter section is still labelled 

    Chris Chapman   

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Larry Cochrane <cochrane@..............>