NavList:

Red wrote

|
| George-
| It would seem like the answer lies in a few short sentences in this
article:
|
| > Bill mentioned Richard Langley's article, referred to in [894] as-
| >
| > ""Getting Your Bearings: The Magnetic Compass and GPS":
| > <http://gauss.gge.unb.ca/papers.pdf/gpsworld.september03.pdf>
|
| To the effect that the two sensors will each present the same data
stream to the
| computer, but 90d out of phase. Therefore when the computer compares
the two
| data streams it can count phase crossings to "count" a full circle.
And the rest
| apparently has to do with a 4-dimensional equation  in which the
datastreams
| should produce a defined ellipse, with any difference from the
predicted shape
| being mathematically reolvable (to those four varables) to produce
the deviation
| error.
|
| In simple words, the fluxgate compass is reaeding and comparing two
data streams
| and can calculate the deviation from them, with no time base needed,
and in fact
| only a 90d turn needed for a minimal solution. I assume the 720 slow
rate turns
| suggested in the instructions that I have seen are there because
that gives the
| computer better detail to work with, producing a more reliable
correction.

==================

Comment from George-

Well, if that interpretation suffices for Red, good luck to him.

For others, however, I recommend that they read the articles that were
recommended, rather than going from Red's interpretation.

George.
|
|
| |
|


--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to NavList@fer3.com
To , send email to NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---