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Re: [gpsd-users] STATUS_DGPS_FIX mystery

From: Gary E. Miller
Subject: Re: [gpsd-users] STATUS_DGPS_FIX mystery
Date: Thu, 21 Jan 2016 14:43:02 -0800

Yo Eric!

On Thu, 21 Jan 2016 17:36:02 -0500
"Eric S. Raymond" <address@hidden> wrote:

> > Eric, any reason for this commit?  Looks like a step backwards.  I
> > would like STATUS_DGPS_FIX restored.  
> Why? What you really want to know in practuce is the XYZ %95 error ,
> no?

As a matter of principal, I just hate to throw away any data.

> I took this out because some devices don't report that status.

Rush to the least common denominator?  I hope not.

>  But we
> can get 95% error ranges ever time from a comptation on the skyview.

But the CEP(95) will differ with the same skyview depending on whether
you have DGPS data ni use or not.  Improvement by somewhat more than a
factor of 2.  Does the current computation allow for that?  And just
because the GPS a WAAS bird in the skyview does not mean it has the
correction data downloaded and in use yet.

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1 541 382 8588

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