Re: Magellan eXplorist 500/600 Review



C.P Kurz wrote: 
Keith schrieb:

Really I could have sworn Garmin did that too.


Some Garmins allow averaging to be applied when creating a waypoint. It can't be used like Magellans averaging.

Excellent, do you think you could log for several hours to see what
happens, the 30 minute numbers are certainly pretty impressive. I
don't think you can turn off SBAS to see what would happen without
it..


The averaging is more effective than SBAS usually, so disabling SBAS doesn't change much.

The results of the eXplorist is not that much different from those of the previous Meridian or Sportrac models. The averaging creates impressive plots, but the recent Garmins basically perform the same.

You will see larger deviations occurring for short times if you log for a longer time. These are usually caused by constellation changes or receiver reconfiguration (if not multipath under worse conditions). Some of these can not even be averaged out by the Magellan. The longer you log, the 'closer' you get to the 'official' 15m accuracy spec.


the 15 meter accuracy spec should be without averaging. You should hit that spec most of the time with an instantaneous number. I know Magellan finds it difficult to produce an instantaneous number since the reading tends to lag what is really happening.

Dale



- Carsten 

--
    _      _     Dale DePriest
   /`) _  //     http://users.cwnet.com/dalede
 o/_/ (_(_X_(`   For GPS and GPS/PDAs
.

Relevant Pages

  • Re: Magellan eXplorist 500/600 Review
    ... Actually it's Magellan that has position averaging -if that's what ... set it to the NMEA mode, and made sure it was sending NMEA to a MapSend ... Then I configured a HyperTerninal file to connect to the soft COM ...
    (sci.geo.satellite-nav)
  • Magellan Sportrak Map "Setting Speed Average"?
    ... Is there any way to change the "Speed Averaging Time" on the Magellan ... Sportrak Map? ...
    (sci.geo.satellite-nav)
  • Re: Which GPS for field data collection?
    ... > Some Garmins offer averaging when creating a waypoint on the spot. ... its web site that the GPSmap 76 can do position averaging. ...
    (sci.geo.satellite-nav)