I submitted a file yesterday that appeared to upload fine, but I never got a response.?ÿ I tried the same file again today and got a "server timeout" error.?ÿ Have any of you successfully gotten an OPUS result in the last 24 hours?
I just uploaded a file, and got a solution back in less than 5 minutes.
HOWEVER...check out the solution v. failure graphic on the OPUS site:
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It seems they fool with the program, screw it up, it's Friday 5:00PM, time to go home. Come Monday it miraculously works again.
Why can't they fool with a program offline debug it themselves and then put it online.
It gets me pretty frustrated dealing with these people.
"Polite version of what I really feel!"
The problem persists using Firefox (which normally works fine), but when I tried Chrome the file uploaded and processed quickly.
It gets me pretty frustrated dealing with these people.
NGS provides these services using a very small staff.?ÿ The value they provide is tremendous, and the price can't be beat.?ÿ Some occasional frustration is annoying, but I can't find any reason to complain.
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It's working with Firefox now.?ÿ I guess it was a server problem rather than anything on my end.
I guess I'm still pissed that everything worked the weekend of the shutdown and when the Essentials came to work on Monday and everyone got paid by the way, they shut down the servers. I didn't make any money that day by the way.
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I guess I'm still pissed that everything worked the weekend of the shutdown and when the Essentials came to work on Monday and everyone got paid by the way, they shut down the servers. I didn't make any money that day by the way.
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Just curious but why depend solely on OPUS? While I haven??t kept up with the other tools since I did a comparison years ago ( http://geodesyattamucc.pbworks.com/w/file/64369423/GPSsolutionsCompared_2013.pdf ), other free processing tools exist. While a basic understanding of datum transformations is required, the tools needed for the manipulations are available on the NGS web page.
If my business depended on free services, I would certainly inform myself about alternatives.
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They aren't really free. We Taxpayers pay for these services and they should be competently managed and maintained. I'm constantly having to find work around because of unreliability. That's gets pretty frustrating after awhile.
Where do you go when the NGS website is down?
Javad has a free online service called DPOS ( https://app.javad.com/jca/#/dpos/upload ).?ÿ It gives me much better results than OPUS, especially for shorter occupations. You have to create an account, but it is free.
http://geodesyattamucc.pbworks.com/w/file/fetch/53012749/lab9_2012_summarySolutions.pdf
The PDF linked above includes some academic and government sites providing (or provided at the time) GPS processing services. Unlike OPUS the alternatives are not developed to support users of SPCs and require attention to issues like reference frame and epoch dates. Most require data be provided in RINEX.
HTH,
DMM
It's actually pretty amazing how many things have to go right in how many different places all across the country for OPUS to work, and how one little thing in some obscure out of the way place can throw the whole thing off kilter.
When I was in?ÿ Oklahoma?ÿ the work flow required that we send in several OPUS sessions each day. One day I noticed that none of the in-state CORS were included in the solutions. They all reached out to neighboring states. Next day, same thing. After a week I made calls. Long story short - some IT person at the state of Oklahoma's headquarters had made a change to their network which caused ODOT's automatic downloading of the CORS to stop functioning.?ÿ Nobody even realized it until I called. I don't know what the fix was, but it was done in an hour (as I recall it took a day or so for all the backlogged data to catch up). So, yes. Some IT geek made a change and it screwed something up.?ÿ ?ÿI'm sure that the change was needed to keep the network functioning well.
My point is - it took a week or more for someone to make the call.?ÿ
Javad has a free online service called DPOS (> https://app.javad.com/jca/#/dpos/upload <).?ÿ It gives me much better results than OPUS, especially for shorter occupations. You have to create an account, but it is free.
One small problem for non-Javad users:?ÿ the submitted files must be in JPS format.?ÿ And I kind of doubt that there's a RINEX-to-JPS converter out there anywhere.
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Since?ÿTopconGPS started as Javad, then a tps just maybe the same as a jps format. I know I can import a jps in Topcon/Magnet Tools. I will test if I can export a jps.
One nice thing about Javad's DPOS service is that it uses HTDP, so coordinate transformations from ITRF to NAD83 should precisely match what OPUS would output. The processors are different so there would be some difference in the vectors, but the coordinate transformation would be identical.
You know for the money you lost you could BUY software.?ÿ
Imagine that.?ÿ
Does it have downtime... yes...?ÿ but what service in the cloud does not??ÿ
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Hence the reason I refuse to go to cloud software for anything productive.?ÿ Sure you can use word and other subscription software, but you can't control when it goes down, can't fix it when it does, and do nothing but loose productivity.
Shawn, does DPOS model solid and coastal tidal loading too??ÿDoes the dynamic CORS coordinate computation match OPUS well?
Knowing Javad and the Geodesists that he employs, I suspect that all the T's are crossed and I's dotted.
I typically run into elevation differences when I hand process because (I suspect) that I am not modeling loading correctly. It is especially troublesome around Cape Cod and Florida for example. I can match the horizontal coordinates to a couple of mm, but elevations are elusive.?ÿ
If you have shareable DPOS report, could you post an example with extended output (if available) for us to checkout? I am always amazed at how nice some of the other reports (like AusPOS) are. Lots of stuff to look at.
Actually, it might be fun to start a new thread here and take a good 8-hour file from a couple of months ago, submit to a bunch of services and post comparative results.
Shawn, does DPOS model solid and coastal tidal loading too??ÿDoes the dynamic CORS coordinate computation match OPUS well?
Knowing Javad and the Geodesists that he employs, I suspect that all the T's are crossed and I's dotted.
I typically run into elevation differences when I hand process because (I suspect) that I am not modeling loading correctly. It is especially troublesome around Cape Cod and Florida for example. I can match the horizontal coordinates to a couple of mm, but elevations are elusive.?ÿ
If you have shareable DPOS report, could you post an example with extended output (if available) for us to checkout? I am always amazed at how nice some of the other reports (like AusPOS) are. Lots of stuff to look at.
Actually, it might be fun to start a new thread here and take a good 8-hour file from a couple of months ago, submit to a bunch of services and post comparative results.
Marko,
I was thinking the same thing just now (about selecting a RINEX file and sending it to the various "online" programs).
I have a 24ish hour i80 file that we could play with (unlike my?ÿ"super tip top secret stuff ??ÿ" Projects). It has both GPS & GLONASS data.
Loyal
Great questions, Mark. I know we've discussed dynamic CORS coordinates, but presently I believe we're using the published positions of the CORS and we do not model for tidal loading. I'm sure it does make a difference in some areas. One thing I do like is that we have access to some of the individual CORS networks, so we can operate exclusive to the NGS entirely. I use the TxDOT CORS network most of the time because there are more stations in that network that NGS has excluded from the US CORS network.
I've attached a report from a short (2.5 hour) session I ran for a job on Saturday, May 19, 2018. I've also attached the raw data file (zipped) if you'd like to submit it to OPUS. The vertical HI is 1.5248m. For elevations, I'd typically prefer more than 8 hours, but for the purpose of this project, the 2.5 hour occupation was good enough. In this example, you'll see in the report that the DPOS solution used TxDOT CORS stations that were much closer than the CORS that OPUS would select for the same solution.
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