> I have not been able to get a copy of the nrcan-ppp softwarepackage, so I > am looking elsewhere. ESA gLAB looks like it might fit the bill. The > problem, in short, is that the data I get from postprocessing with gLAB is > much, _much_ noisier than the results I get from submitting the RINEX files > to NrCAN-PPP online service. >
Hi Ole! I did a comparison of a few PPP results some years ago, maybe you saw it already http://www.anderswallin.net/2013/12/comparing-gps-ppp-solutions/ For the web-service running NrCAN, there was an URL API that allows running the filter/algorithm forward and backward ("filtfilt" in matlab or numpy), to get rid of the initial transient in only the forward solution. You could ask the maintainers, or I can try to dig in my archives (I should have python code that submits RINEX to the service and retrieves the results). >From my link above it looks like the troposphere-models are quite different. Here is a recent ".sum" summary file from a NrCAN run: https://pastebin.ca/3816315 in section 2.7 it has the troposhpere model type, and in section 3.1 a parameter "TZD random walk (mm/hr): 5.000" if you dig in the ESA gLAB settings, can you set the ZTD-model identically and see what happens? If you post your RINEX:es and other relevant data I can try processing also and see what I get. cheers, Anders _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
