Can anyone direct me to articles or directions on revising RINEX files?
Either our GPS is glitching, or user error is a factor, but from the rinex files, it appears that we are collecting a few seconds of data before the file is physically started.
OPUS/CORS is returning a multiple location error.
When I try to match up our base station RINEX (which passed), and revise the file so they look similar, OPUS returns "failed to pass an initial test.....
IS there perhaps a line counter or some formatting issues I am missing?
Any direction would be great.
The best 2 choices are TEQC at https://www.unavco.org/software/data-processing/teqc/teqc.html or WinTEQC at http://teqc.silkwerks.com/
Use eather of these products to trim off the first few minutes of your RINEX file. WinTEQC is just a GUI for TEQC. Just make sure that you have 20+ minutes for OPUS RS or 2+ Hours for OPUS.
With my OLD Ashtech Z12 Receivers sometimes if you don't enter the site name fast enough they will add a marker to the RINEX file indicating that your observations are in 2 locations. In that case you can just delete the marker.
Best Way To Get A Good GPS File
is to start a new file after at least 6 satellites have been acquired and ambiguities resolved. That initial file can then be deleted. Most manufacturers post processing software will ignore crappy initial data, but OPUS and especially OPUS-RS want good clean data from the get go. If the first few epochs of data observations are not up to par OPUS-RS wastes no time in looking deeper into the file.
RINEX files are acii/txt files and can be edited with a simple text editor, I use WordPad. For more complicated editing, data parsing etc. use the online teqc.
I suggest you use WordPad and get accustomed to seeing what a good RINEX file looks like, with all the data and no or very, very few cycle slips.
Paul in PA
