[Qgis-user] Trimble GeoXT 2005 Accuracy

[Garth Fletcher]

Nicolas Cadieux wrote:
> Kirk could be on the right track.  You could try PPP using this site.  You will need to create a user name and password.  Then, you upload the Rinex file.   I am 99% sure you can process point from outside of Canada.  

I routinely use CSRS PPP to post process RINEX files from Southern New
Hampshire (43°N, 72°W).

Using an iGage iG3s (L1/L2 dual frequency, GPS + GLONASS) recording at
5 second epochs in forested areas, from post processing I get
  30 minute recordings, 95% error ellipses < 1 meter
  10 hour recordings,   95% error ellipses < 2 cm

CSRS-PPP site is
<https://webapp.geod.nrcan.gc.ca/geod/tools-outils/ppp.php?locale=en>
enter your email address
select Static and which NAD 83 epoch you want, or ITRF
Submit a RINEX file (.zip compressing the file is encouraged)
they will email back a detailed report

You can submit for 1 of 3 levels of post processing
  ultra-rapid : submit > 90 minutes after end of recording
  rapid: submit > 24 hours after end of recording
  final:  submit ~ 3 weeks after end of recording

Major part of corrections are in ultra-rapid, the higher levels provide
further refinements.


FYI: Trimble provides occupation planning aids at
<https://www.gnssplanning.com/#/charts>
just enter your location and date and it shows you the DOP as
a function of the hour of day.

Cordially,
-- 
Garth Fletcher