[Xastir] Question on site survey

[Brian D Heaton]

Jack,

	Do you have access to a 3rd GPS from a 3rd vendor (or even a few
more)?  I think it would be interesting to see if two agree and only one
disagrees.  That might give you a few more datapoints.  

			THX/BDH



On Mon, 2003-12-08 at 04:43, Jack Twilley wrote:
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> I've mentioned on xastir-dev that I'm running a site survey with my
> M12 Oncore GPS in an attempt to identify precisely where my station is
> located.
> 
> I've noticed something disturbing about the survey -- I've been
> collecting data for roughly five days and my original estimate
> (gathered from my Garmin GPS III+ in my car, and from Mapquest, etc.,
> with my address) is reasonably accurate in latitude and altitude but
> not longitude.
> 
> The amount of error in longitude is within 0.2% of 100 meters, with
> the Oncore thinking it's 100 meters west of the Garmin's location.
> 
> That nice round number looked suspiciously like a datum problem, but I
> checked with the @@Ao FF command, and I received "ID 49", which
> corresponds with WGS-84 according to the Oncore documentation.
> 
> Suggestions?
> 
> Jack.
> - -- 
> Jack Twilley
> jmt at twilley dot org
> http colon slash slash www dot twilley dot org slash tilde jmt slash
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Brian D Heaton
Senior Network Engineer
Janus Research Group
(706) 364-9100
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