Out of curiosity, have you been able to log data from a Trimble 4000SSi directly to a PC? I have been trying to use the rutils, rstream and rcapture with the RT Survey Data, Cycle Printouts, but the rutils don't seem to like the receiver. If I run a terminal emulator on the PC, I can see the RT Survey Data coming from the 4000, but rstream won't capture anything. There seem to have been a number of Trimble applications for capturing data from the reciver, but I'm having difficulties actually getting hold of anything. (One might think that something like the "LOGST" DOS application would be on the Trimble FTP site, but no.)
I've been happily using TEQC to create RINEX files from data logged internally on the receiver, but I'm trying to overcome the internal memory limitation.
Thanks in advance for any suggestions.
Jason
i have steamed data from a 4000 to a pc but as I remember we where just using the nmea llh out. For awhile I had a 4000 set up at my office as a base and it was connected to a pc and would send a 24 hour data file to the pc everyday. I'm certain I had to buy a software package from trimble and i think itvwas called Trimbe Base or somrthing simple like that. When I get to the office tomorrow I wiil see if I can find it.
Don't know if this will help but it's how I got static data to the pc.
http://trl.trimble.com/docushare/dsweb/Get/Document-1167/TRS.pdf
Back in the 4000 days (mid to late 90's) I wrote a windows program to read the RT17 stream coming out of the receiver and convert it to .dat file format and also to RINEX directly. The early PA CORS sites all used my program, but then Trimble improved their data logging software. They had originally used LOGST, but it had problems, one of which was that the the file times would slowly drift.
I also used to use it to log data for ABGPS sessions, where you needed to collect a lot of 1s data, back when receivers had 1 or 4 MB of on board memory.
That was all back in the windows 95 days. Once windows XP came along, the program wouldn't work right (it would collect for a while then stop), but since it wasn't really needed anymore I didn't try to fix the problem.
So, it can be done, but it is not trivial. It took me quite a lot of time to design and code the program. But, I learned a LOT about dat files and the rinex format!
Thanks for the response John.
Any idea where I can find documentation on the R17 data format coming out of the receiver, that you use to creat a .dat file? I'm just looking for something straight forward to log output from the receiver in a format that can be fed to TEQC.
I gather that the Trimble GPSBase software would probably do everything, however I have a non-commercial application, so a $3,500 software investment isn't in the cards.
Thanks again.
According to the R-Utilities User Guide (January 2004) -
The RT17 data format is documented in the 4000SE/SSE RS-232 Interface Specification Manual (P/N 22794-00).
I can provide a PDF of the May 1995 version of that document. Send me an e-mail via the link to the right of my name above.
GB
Maybe this misses the point, but can you use TEQC to read the data directly, rather than creating a DAT file as an intermediate step?
From the TEQC tutorial:
Trimble RT17 Stream:
The Trimble RT17 format from Trimble 4000 SE/SSE/SSi and later receivers is readable with teqc. Currently, only the record 55h with ephemeris information and record 57h (GPS or MET observables) have been coded, though, again, teqc will report and skip other records.
On a Windows box, I don't know that one can easily receive data directly from the receiver. Perhaps piping a serial device to the TEQC might work? My issue has been that the Trimble 4000 tools do not work at all with my 4000SSi. I do not beleive TEQC can download a file directly from a Trimble 4000 receiver.
What do you mean by
Trimble Tools? What tools are you talking about?
Trimble Tools
The Trimble R-Utilities:
http://facility.unavco.org/kb/questions/362/Trimble+R-Utilities
and even more Trimble software:
http://facility.unavco.org/kb/categories/GNSS+and+Related+Equipment/GNSS+Receivers/Trimble/Trimble+Utilities/
