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Subject: Re: Fluxgate compass
From: Brian Whatcott (inet@XXX.XXX)
Date: Tue Jan 29 2002 - 19:33:58 EST
At 05:16 PM 1/29/02, you wrote:
>... What exactly
>is a bolt-down sensor? And what errors does it "abolish"?
>
>As I understand it, a fluxgate compass, like any other compass, needs to
>establish the direction of the horizontal component of the Earth's field,
>with respect to the direction of the vessel. For this to happen, somehow
>the fluxgate compass, just like any other compass, has to be aware of the
>direction of the horizontal. ...
>George Huxtable.
George, the comments I posted were on the basis of examining the
constructional details of a fluxgate. In view of your praiseworthy
efforts in describing the Lunar, I'll try to return the favor by taking
a look at what the commercial fluxgate offerings provide.
It may be that for a 2-axis fluxgate, a pendulous mount might be adopted.
This would retain the pendulous errors associated with a compass card
of the conventional kind. I'll get back to the list, if I find useful
engineering input.
A three axis fluxgate can be mounted rigidly. This is sometimes called a
'bolt-down' sensor.
Brian Whatcott
Altus OK Eureka!
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