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Using R8 as a base station for post-processing R2 data in Positions

  • 1.  Using R8 as a base station for post-processing R2 data in Positions

    Posted 03-19-2021 05:33
    It has been suggested that an R8 can be used as a local base station for post-processing R2 data in the Positions extension in ArcMAP where the existing base stations are too distant. We haven't been able to identify the workflow to make this happen. Probably overlooking something obvious. Can someone point us to the proper documentation.

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    William Limp
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  • 2.  RE: Using R8 as a base station for post-processing R2 data in Positions

    Posted 03-22-2021 10:32
    i havent set this up in positions before, but the steps below will get you on the right track.  

    Open Esri ArcMap
    Go into Trimble Positions Desktop Admin tool
    Choose processing profiles
    click on create
    under search for a base station, check box next to "using a single base station" and choose select
    click on NEw (you may have to select a base station to activate the "new" button
    Go through the tabs and fill out the necessary information
    - reference position (this can be from a known control point that you set the base on or by logging a static session and sending that file off to OPUS or Trimble Centerpoint)
    - make sure that you enter/pick the correct datum
    Internet server tab, nav file format
    - THis is where you will setup the base file information.  Since this is a local base, you will choose "base data is found in local or network drives" and browse to the files.

    I currently dont have any data to test, so this is where i will have to leave off and hopefully someone else can chime in.


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    eric bock
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    Original Message


  • 3.  RE: Using R8 as a base station for post-processing R2 data in Positions

    Posted 03-22-2021 10:46
    Yep...Eric's got it right. You'll just need to specify the reference frame as well - use NAD 1983 (2011) as that's what you'll get from either NGS OPUS or Trimble RTX Post-Processing.

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    Matt Morris
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    Original Message


  • 4.  RE: Using R8 as a base station for post-processing R2 data in Positions

    Posted 03-23-2021 07:46
    Great info. Thanks to Eric and Matt. We are hoping to get a loaner R8 to test with our current centimeter R2 and test the process. If that works then we have a faculty who works in remote areas globally.. doing gravity research.. and he will likely purchase.

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    William Limp
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    Original Message


  • 5.  RE: Using R8 as a base station for post-processing R2 data in Positions

    Posted 04-24-2021 11:58
    Interesting workflow - points to the importance of keeping Positions and the Post Processing a key element in the Trimble toolset.  Not everyone has realtime access.

    On the R8, ensure your set to +logging (which provides the file for OPUS submission - to generate the base provider Lat/Long to "hold", while you need the *.T0x file to process against.  Ensure you overlap in time the base start / base end time with your R2 rover time collection.

    The Differential Correction utility still supports .??o RINEX which you'll get from the R8 which will be your base file you point the local instance of differential correction will point to for base files.  Keep us in the loop how it pans out.   

    In remote regions, your guy won't likely have anything to survey check against, so I would suggest setting a control point anywhere (drop a nail).  Hit that nail with your R2 during the field collection.  Call it "check shot".  Then close out your R8 on the base location, move your R8/Tripod and setup on that nail you shot in with the R2.   Run another 2 hour session on that nail. Submit that to OPUS.  You'll have that coordinate to compare your R2 shot against.  Your looking for hitting that "bullseye" within a few centimeters.  If you get a error of meter, meter +, you'll need to re-assess your processing until you do hit it. Assuming your using ESRI collector or TerraFlex software on your rover there are a few datum gates you will need to pass thru to hit the mark.  Without a checkshot, you'll get precision, but the data might not be "in the right place".

    Joel Cusick



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    Joel Cusick
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    Original Message