One of the observers in a project I'm managing has an R7 on loan from another branch of his agency. He has no data collector with it, and hasn't used it before. I'm not familiar with the R7 either, so yesterday we tried turning it on and the lights suggested that it was logging data. I got a T02 file out of it, though when I brought it into TBC I didn't get a point from it. I converted the file to RINEX, and it appears to have data.
The guy called today to say that there's a "log data" button on the side that we should have used. Is that the preferred procedure?
Jim,
Could you shoot me the RINEX file?
I'm curious to see what IS and ISN'T in the file.
Loyal
LDOGEO
AOL
I'd be curious to see both the T02 and the RINEX - if you send me the T02 I can make my own RINEX.
With the R7 it would not typically log raw data on startup, you would have to push the Logging button (grey button on the left with the ports facing up - I presume you have an R7GNSS since you said T02 file). When you do turn it on and then push the log button, it should insert the autonomous position into the file. You would of course want to wait until the Satellite light was at a slow blink to press Log, and when you do the (I believe red) logging light should come on.
If it's logging on startup it probably has a Power Up batch file in it, which can be bad news because every aspect of the receiver's behavior can be influenced by this. The way to get rid of that would be a hard reset - hold down on the power button; after the lights go out the Satellite light should come on steady after 15 seconds, after another 15 seconds it should go back off. This is a hard reset; release the power button and the unit will reboot.
Make SURE you download it before performing a hard reset!! It formats the memory card.
I suspect that the unit has a power up file that is forcing it to log on startup and the file header is being written before any satellites are being tracked.
Here's a link to the "user guide" from the NGS
http://www.ngs.noaa.gov/corbin/class_description/TrimbleR7-R8_UserGuide.pdf
By the way, in TBC you should be able to insert a coordinate for the point in question; just grab a lat/long and elevation off of Google Earth.
When you import the file presumably you see a point number in the Raw Data Checkin dialogue; just go to Project Explorer, expand Points, right-click the point name, and select Add Coordinate. Make the coordinate Global and type in the lat/long as well as an approximation of the ellipsoid height based on the geoid heights in your area, make sure it's class is Unknown, and make sure it's Enabled. Now you'll see the point and the associated baselines.
It would be interesting to see if you could process baselines to it without having a starting coordinate; I highly doubt it though. I'd be interested to see if the baseline showed up in a Time Based View without a coordinate.
One last thing - if you have GPS Configurator you should be able to do a hard reset through it:
http://www.trimble.com/support_trl.aspx?Nav=Collection-3615&pt=GPS%20Configurator
I sent the RINEX file to Loyal and both RINEX and T02 files to Lee. Feel free to comment!
Scott M., who arranged for me to borrow one his agency's guys and equipment for this project (it's a multi-agency subsidence monitoring job, all the observers are agency staff), said that he thinks the receiver is probably set up to start logging on power-up. That would seem to explain the file I got.
Jim,
The first epoch had ONE bird, and the second epoch had Three...that is usually a "fatal error" for most processors.
The third epoch had six birds, do I just tidied the file up a bit (and also did a teqc on the tidied version to remove additional observation type that are probably un-necessary).
If neither file processes, let me know and I'll take a deeper look at it..
Loyal
I had to put the project aside for a bit -- my son's high school graduation, with all the attendant relatives, took up most of my Friday -- but when I went back and downloaded some CORS data for the same day of the test file, the T02 file processed normally in spite of the low-data condition of the first couple of epochs. And the fact that I didn't see a point upon import was embarrassingly easy to solve: somehow I had turned off the points layer.
It looks like the R7 is good to go for the project.