PSN-L Email List Message

Subject: Re: Article on gravimeters
From: offutt@............ (Warren Offutt)
Date: Mon, 8 May 2000 06:49:03 -0600 (MDT)

Compliments to John Hernlund for a very nice and well done analysis
of the rotating pair of accelerometers.

I'd like to add that, as far as instrumentation is concerned, it is]
much easier to obtain stable high gain in a passband that is not
centered at baseband ... in other words, a high gain, stable AC amplifier
is easier to achieve than a high gain stable DC amplifier, and the
rotating frame has the benefit of moving at least part of the
spectrum of interest up out of the baseband ...

John, I admire what you have done.

Regards to all

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