A question to those more experienced in the world of post processing GNSS data. I am a studying surveyor undertaking my final year of study and doing a thesis comparing GNSS post processing services. I am proposing to process data through Centerpoint RTX (among others) but it does not appear that the Leica GNSS GS 14 that i have to work with, is supported. I have read that it is possible to spoof the system by choosing a supported receiver comparable with GS 14 and editing the RINEX file accordingly (see the link to an article by Mark Silver on GPS World web site http://gpsworld.com/7-free-alternatives-opus-post-processing-in-government-shutdown/ ). Question is how would i determine which receivers are comparable to a GS 14 AND given the GS 14 receiver also incorporates the antenna how will this affect processing when antenna type is requested?
We don't do static obs and processing very much at all in my firm so this is a first for me and i am very much a beginner. Can anyone shed some light on how this might be undertaken and anything i need to look out for.
Thanks in advance
Dan
I suppose you might be able to read through the NGS antenna calibration file and find an antenna that this Trimble service supports which is also characteristically indistinguishable from your actual NGS calibrated antenna.
Or use OPUS (or one of the other online processing sites) instead?
It looks like the only all-in-one Leica they support is the GS10. My suggestion would be to change GS14 to GS10 in the RINEX file, then go to the NGS web site and see what the actual phase center differences are - they may be inconsequential, or else you could apply a height correction. Bear in mind that the noise level of the solution is on the order of a centimeter or so.
You could also submit the data to OPUS calling it a GS10 and a GS14, then apply the differences for that session to the Centerpoint solution.