Re: [Paddlewise] GPS Errors Summary

From: Michael Daly <mikedaly_at_magma.ca>
Date: Thu, 02 Sep 2004 11:58:53 -0400
On 2 Sep 2004 at 19:12, PeterO wrote:

> 2. Mike Daly reported that his GPS frequently shows an EPE of less
> that 15m and he would ignore errors at that low level though larger
> errors he would take notice of.

Just to clarify.  A low EPE means that the GPS thinks everything is 
fine even though those estimates are less than what is possible with 
the technology.  It isn't the errors that I ignore, it's the EPE.
Higher EPE means that there are real errors creeping into the 
position readings and I make sure that I consider that when looking 
at the reported position.

Even at SA levels of error (<100m, 95% of the time), that's still a 
lot better than what you can do with a sextant, so error 
interpretation is relative.

Mike
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Received on Thu Sep 02 2004 - 08:56:41 PDT

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