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Re: GPS & Magnetic Bearings
From: Robert Eno
Date: 2003 Feb 9, 20:18 -0500
From: Robert Eno
Date: 2003 Feb 9, 20:18 -0500
So are you saying that you GPS has the capability to acquire updated magnetic deviation data? Is this done using a computer disk? Robert ----- Original Message ----- From: Brooke ClarkeTo: Sent: Sunday, February 09, 2003 6:11 PM Subject: Re: GPS & Magnetic Bearings > Hi Robert: > > You're very close. The World Magnetic Model is based on empirical observation, not a theory. The model uses a 12th order > polynomial based on past observations. My Motorola GPS uses flash memory and can be updated for a fee. The model is much more > complex than just the variation (I misused deviation in the prior post), it has magnitudes for all three vectors North-South, > East-West and the largest one Up-Down. > > Have Fun, > > Brooke