[time-nuts] PPP with RTKLib?

Anders Wallin anders.e.e.wallin at gmail.com
Fri Dec 20 07:04:28 EST 2013


Hi all,

I want to use PPP for post-processing of RINEX 2.10 files from a Dicom
GTR50/51 GPS receiver. The GTR50 references the time-stamps in the RINEX
file to an external PPS input, so this is a way of remotely monitoring a
clock.

Does anyone know how to run PPP-Static calculations with RTKLib?
I have an example RINEX file which I ran through two online web-based PPP
services:
CSRS-PPP over here:
http://webapp.geod.nrcan.gc.ca/geod/tools-outils/ppp.php
and JPL-APPS over here:
http://apps.gdgps.net/apps_file_upload.php

Then I try to do the same calculation with RTKLib with a number of input
files and I get:
http://imagebin.org/283130
The two online services differ by about 3 ns, but the overall shape of the
solutions is very similar.
My RTKLib solution is very noisy and I doubt if the PPP-calculation is
working at all.

Here's what I am feeding into RTKPOST:
my own RINEX 2.10 Observation data file. This 24h of data from 17th of
October.
and then a lot of files fetched from IGS with RTKGET
igsXXX.clk (clock data)
igsXXX.sp3 (orbit data)
brdcYYY.13n (ephemerides or "nav" data?)


thanks for any input,
Anders


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