[time-nuts] Averaging Location for Position Hold
mail at miguelgoncalves.com
Tue Sep 13 21:49:12 UTC 2011
I believe then that is best to rely on SynTac position averaging or the
On 13 September 2011 20:24, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> In message <CAEdntmtEcC=_N1uwvNb2GZqVX8r-AXO81hw+SXF6=
> p+kEGbNVw at mail.gmail.com>
> , =?ISO-8859-1?Q?Miguel_Gon=E7alves?= writes:
> >I have a log with around 213400 samples. Each line is similar to this one
> >I averaged the minutes of latitude and longitude, the MSL (278.9) and the
> >Geoid Separation (51.2) and got the following
> That doesn't work very well, because the variation in your samples is
> not a random distribution: Echos and other multipath is the same every
> day, the buildings that cause it do not move.
> A much better strategy is to weigh the filtering by DOP quality or
> even better, if you have the actual residuals from each of the
> satelites used.
> You may find some inspiration here:
> Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG | TCP/IP since RFC 956
> FreeBSD committer | BSD since 4.3-tahoe
> Never attribute to malice what can adequately be explained by incompetence.
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