Our construction crews have these, along with a Ranger and Survey Pro. When the opportunity affords itself, we've been using them to log data for OPUS projects- we log to a file in the rx, using the key sequences in the user manual... It works pretty well so far- One glitch that we have encountered is that after you start the session- the display shows "A## R"- We record the time for the start of the session, after 2 hrs - we push the off button until the unit shuts down and record that time. Frequently even though we've gone to the 2hrs + mark - OPUS will give us the file too short message and boot it over to OPUS -RS. example logged time 2hrs 2 minutes OPUS sez file is 1hr48 minutes--- :-/ - our current work around to log at LEAST 2 hrs 20 minutes- which is working- but WITH does it end up with a short file if it's recording when you leave and when you return.... I plan on spending more time reviewing the files and log sheets on Monday, but was just wondering if anyone else out there has been down this road.
We use the same receivers and have not had that problem. We do however stop the recording on the receiver before we power off. Not sure if/how that would make a difference - but it could be a reason you are loosing approximately 15 minutes of observations? :-/
That could very well be our problem- hard to believe it would truncate the file by that much. Anyway- we'll implement the end PP step instead of just shutting it off. Should have had a better grip on that....:-/
Learn To Verify The Number Of Satellites Locked L1/L2
I do that, and once I have 6, I reset to start a new file. That file I make sure is over 2 hours. L1 and L2 when locked indicate the ambiguities are resolved.
If you took a look inside your rejected OPUS RINEX files you will most likely see at the beginning you have L1 but not L2 observations. It is easy to trim out, but easier to make sure I have a good start in the field before walking away to do pother survey work.
Remember that 15 minutes extra in the file can save you a day from no OPUS today to waiting for OPUS-RS tomorrow.
There are no shortcuts to guaranteeing good data. It is always too late after the receiver is turned off.
Paul in PA
Curious if you have had a chance to test our theory?
Not today- Epochs were all out today with the construction folks- may be Friday before I can get my hands on one again. -
Didn't get to look at the files-vs log sheets either. too much other Monday type stuff going on to spend much in-depth time on project stuff like that. maybe tomorrow.... I plan to shut my door 🙂
