Positioning a RTK Base station in France and DROM

1. Convert a Log File to a RINEX File

• Go to the LOGS tab of your RTK base and click the pencil (edit) for a complete 24-hour .zip file.

• A window will open offering to convert the log file into a RINEX file.
• If you are in France: choose the IGN preset, which is compatible with the IGN online services for precise positioning calculations. Click Create Rinex File.

• Wait while the RINEX file is created; this may take several minutes.

• Download the generated file. Once the window is closed (close), the RINEX file will also appear in the logs list with a name like YYYY-MM-DD-your_mountpoint_name_ign.25o, with a size of about 4 MB.

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2. Post-Processing

This step corrects the raw data from your RTK base using reference stations from the Permanent Geodetic Network to obtain a precise corrected position.

• Go to the IGN website: Online GNSS Network Calculations
• In the "Observation files in RINEX format" section, upload your file YYYY-MM-DD-MP.20o into Pivot
• In the "Permanent GNSS Stations to integrate" section, set:
  • maximum number: 8
  • maximum distance: 1000 km
• Enter your email address to receive the report
• Refresh the code with the blue arrows and enter the 4 letters
• Click Submit request

The positioning report will be sent to your email after a few minutes.

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3. Interpreting the Report

• The report (xxxxxx.tar.gz) must be extracted. It will also be required when declaring your base on the Centipede-RTK network.
• The report contains 3 documents:
  • a help file (readme.txt) explaining the report structure
  • a PDF map showing the distribution of reference stations and the residuals of the adjustment
  • the calculation report in text format
• The report is composed of several sections; the position of your base is located at the end of the document in the ====== RGF93 ====== section
• It is important to check the ESTIMATED ACCURACY (2*SIGMA) section because it indicates the quality of the calculation.
  Your values must be below 10 mm for E_N and E_E, and below 20 mm for E_H.
• Note the coordinates of your base in this order: Latitude Longitude Hell, so that you can copy them into your RTK base.

• Now proceed to finalize the RTK Base Positioning Configuration