What's up with OPUS..

Trees CORS are the ones mounted to trees. +/- 1M depending on wind conditions. Sorry I couldn't help myself. 😀

It sounds like you either submitted the data too soon or hit the luck of the draw. Occasionally shorter occupations will hit a window where the data is slow becoming available or never appears. In that case try manually downloading CORS or public data from local subscription service.

We use OPUS regularly. Over time I've developed some pretty good back-up plans. Use it when it works but be ready for plan b...

THE MESSAGE SAYS..

The actual message says, "After the single baseline analyis, fewer than 3 reference stations remain, Aborting.

Is there some settings screwed up.
The file was submitted late Tuesday. Re-submitted yesterday morning, with same result. Went back to point and re-observed yesterday. Re-submitted several times late yesterday and today to no avail. Same message.

Files are about 1 hour each time. Sent as OPUR-RS. Never experienced this before in all trhe years I have been doing OPUS.

Go To NGS CORS And Check On Data Availability

It is very possible that the local CORS switched over to submitting the latest RINEX version with 11 possible observation and they got some setting wrong. A few months ago I specifically checked some CORS that had no data available per OPUS but had the 11 observation RINEX. I contacted NGS and they got some settings changed.
Download RINEX from ufcors or directly from the CORS ftp site.

Paul in PA

> I submitted three times for a point. No solution either time.
I had a situation last year here in Oklahoma where none of the the DOT run CORS had downloaded for over a week. I ran down the man in charge and made him aware. He got right on it and it still took a couple of days to fully resolve.

I had a similar situation several years ago with one particular CORS in Oregon. The guy who did the downloading went on vacation in that case.

Anyway, the point is, check the CORS data log to make sure that data is available for the CORS in your project area for the relevant time frame.