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Re: [gpsd-dev] [gpsd-users] ✘ Unchanging lat/lon/alt/time error estimat
From: |
Gary E. Miller |
Subject: |
Re: [gpsd-dev] [gpsd-users] ✘ Unchanging lat/lon/alt/time error estimates |
Date: |
Wed, 11 Jan 2017 13:57:26 -0800 |
Yo Hal!
On Wed, 11 Jan 2017 13:41:55 -0800
Hal Murray <address@hidden> wrote:
> address@hidden said:
> > Also,,, most of the regressions are short snippets and to see this
> > problem you need maybe a few minutes of data with a changing
> > skyview.
>
> Should we collect one sample that is long enough to show things
> changing?
I added a UBX sample that is long enough. All the others I could test
were long enough (NMEA 183, SiRF). That still leaves a lot I can not
test.
> Do we need several minutes, or just a few seconds that straddles a
> change?
You just need two changes of a sentence with SATEELLITE_IS set. That
may take 10 seconds, it may take a lot longer.
I guess I'll dig out an old Garmin to try.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
address@hidden Tel:+1 541 382 8588
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"If you can’t measure it, you can’t improve it." - Lord Kelvin
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