Known issue: SBF file analyzing

This article explains how to check the quality of your SBF file(s) using the SBF Analyzer tool.

There are a couple of reasons why PPK fix can be low: 1, bad base station RINEX files, or, 2, a bad SBF file. The steps below will help you to verifying or exclude the latter case.

1. Get the WingtraOne SBF file from the customer and put it onto a computer with the SBF Analyzer tool installed.
2. Right click on the SBF file and select "Analyze SBF file."
3. A new SBF Analyzer window will pop up. Select only the following plots to be shown: carrier to noise, number of satellites, and general information. Click onto carrier to noise, then plot options and select L1 or L2 for GPS and GLONASS.
4. Click "Analyze" to start the analysis.
5. In the general information window, you can check "Message Statistics" --> "ExtEvent1" for the number of triggers. Check if it matches number of images.
6. In the number of satellites window, check if the average number of satellites is sufficient. In normal cases, there should be at least 20 satellites in total.
7. In the carrier to noise window, check if the carrier to noise fulfills our requirements:
   1. L1-C/A, L1-C/A: best satellite over 45 dB, 7 satellites over 40 dB
   2. L2C, L2-C/A: best Satellite over 36 dB, 7 Satellites over 30 dB