A colleague called today to ask if I was aware of anything wrong with the GNSS systems over the last week or so. His firm has a couple of R8 rovers that they run on an RTN operatied by the local Trimble dealer, and he says that in the past week their results -- particularly vertical -- on known points has been off by two or three times the usual amount.
My RTK experience is limited, and I haven't been doing much with it other than getting used to some new equipment in the last week. The space weather looks okay. Any suggestions on how he might go about troubleshooting his problem?
Thanks!
> My RTK experience is limited, and I haven't been doing much with it other than getting used to some new equipment in the last week. The space weather looks okay. Any suggestions on how he might go about troubleshooting his problem?
Correct me if I'm wrong, but isn't Standard Operating Procedure when RTK is involved to just go ahead and publish the results and maybe see what happens? I mean, if some of the positions are about 1m in error, that will come up sooner or later, but in the meantime that's no reason to hold up some real estate closing, right? :>
Has there been lots of rain lately? I have seen rain mess things up in the troposphere, and give some bad verticals. But horizontal usually goes along with that.
Does your Sarcastic Operating Procedure involve redundant occupations at different sidereal time offsets? If not I recommend using a Groma and some Egyptian rope-men because this new-fangled GPS science-y stuff is hard when the earth is flat...
Sarcasm aside, Try contacting the RTN operator. Sometimes private RTN networks will pull the old switcheroo without telling anyone because their dynamic base stations stop fitting the network after some crustal deformation.
You and your colleague are probably already know this, but CRTN is free in California. The caveat being it does not have a multibase/VRS solution like the private operator probably has, but their reference system "updates" are well known and published, and you have a verifiable tie to the CSRS.
the only weirdness that I'm aware of is that the system really does work 🙂
> the only weirdness that I'm aware of is that the system really does work 🙂
I know, weird, right?
