Anybody notice a recent decline in the number of available CORS stations? I don't know if this is related to the DOGE activities over the course of the last several months. I'm trying to post processing some base data myself using nearest CORS and finding many that I've relied on in the past are now non operational for one cause or another. One AC53 is suspended and TSEA listed as non operational. Just curious if anybody is running into similar issues.
I sort of have to laugh because I've been asked to bring control into a project that was designed completely off Lidar data without the benefit of a survey and told Monday I need to set control and have it for them by today so they could bid the work out. I was very tempted to tell them their lack of planning doesn't really constitute an emergency on my part, but I'll see if I can't pull a rabbit out of my nether regions for them, but I can't promise anything. Must say my idea of fun has evolved with the times.
Just because I'm paranoid, doesn't mean they aren't out to get me.
I haven't seen less of them recently, although, there are no remaining CORS left that I would use when I started doing static. It may be different in other locations, but it's not unusual to see them vanish.
@mightymoe I guess I've been out of the loop and it's been a while since I tried processing myself in lieu of using OPUS. I know these stations are always sort of in a state of flux but I guess I was more curious as to if there was a trend towards fewer being available. I know a few years ago I had real issues with getting Rapid solutions from OPUS and it wasn't until I started checking on the health of the various CORS and manually selecting them that I was able to get any reliable results.
Just because I'm paranoid, doesn't mean they aren't out to get me.
In a recent project submitted to OPUS I am only able to get a solution using GPS only. Adding other constellations (GNSS) gets a message the OPUS is aborting. I have no idea why. It could be the CORS stations are not available, do not provide GNSS data or have been DOGEd.
Historic boundaries and conservation efforts.
@not-my-real-name That’s the problem I’m having. I’m going to trying stripping out all the other constellations when I get the chance. Didn’t use to be an issue.
Just because I'm paranoid, doesn't mean they aren't out to get me.
I chatted with Mark Silver (I bought my equipment from him and his company, iGage) and he tried to help, but was having the same problem.
He suggested excluding CORS stations that may be offline or bad. I tried that, but it was not possible to get a short term plot.
I also tried trimming the file. Nothing helped. If you find out what is happening, let me know.
Historic boundaries and conservation efforts.
@not-my-real-name I'll give it a day or two and try again but everything I've tried so far hasn't worked. I decimated the file to remove everything but the GPS SVs and stripped out any noisy streams and still aborts. No idea what the problem is. I even manually selected only healthy CORS to be used, same result.
Just because I'm paranoid, doesn't mean they aren't out to get me.
@not-my-real-name Got a solution this morning. Took a few days so maybe try it again now? Used 9 CORS which is pretty decent.
OPUS has spoiled me.
Just because I'm paranoid, doesn't mean they aren't out to get me.
I'm still getting the message that OPUS is aborting. I'll try collecting data on another project tomorrow to see what happens there.
Historic boundaries and conservation efforts.
@not-my-real-name I've come to expect that I need to wait a couple of days, but I've had some significant problems with the OPUS-RS in the past and with everything going on right now, wouldn't be too surprised if issues become exasperated. One thing I've observed is if the data starts out noisy, OPUS quickly aborts and sometimes by trimming the Rinex file to eliminate the problem data, it will then work.
Just because I'm paranoid, doesn't mean they aren't out to get me.
I have no problem here in the last two weeks and two today one yesterday so far. Some CORS in my area have been decommissioned. Although none that were NGS owned only ones from others that submitted the data to NGS. I assume either they have replaced them with others in close proximity or are under upgrades. Most of those I see are part of NRTK hosts and are no longer in that either but have new ones in other locations. So as an old NRTK provider myself we would sometimes see data that we would determine that particular site moved to much or had to much multi path or we would just loose the lease on the real estate from some owner selling or not wanting us on the building anymore. If you subscribe to a NRTK provider sometimes using CORS data from NGS sites along with the NRTK providers sites that are not in NGS you can process your own solutions very quickly and over time you can see it can be just as productive and accurate as an OPUS and it saves. You in a situation where NGS opus is down etc.
Finally got an error message that kind of explains my error. The message is that IGS (International GNSS Service) was not available on the day I collected the data. At least that is better than a message that the data was "noisy". Sometimes computer programs just spit out random messages when they fail.
Historic boundaries and conservation efforts.