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    Suunto 9 Highly inaccurate speed readings

    Scheduled Pinned Locked Moved Suunto 9
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    • Dimitrios KanellopoulosD Offline
      Dimitrios Kanellopoulos Community Manager @freeheeler
      last edited by

      @TELE-HO yes correct

      Community Manager / Admin @Suunto
      Creator of quantified-self.io a portal that allows you to analyze your data from various providers, upload fit activity files to Suunto app, gpx routes and more…

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      • surfboomerangS Offline
        surfboomerang @Dimitrios Kanellopoulos
        last edited by surfboomerang

        @Dimitrios-Kanellopoulos Just a small update/test after the latest firmware update:

        I exported the FIT files of two moves from Runalyze and used GPXSee to analyze the fit files. The tool has 2 ways to calculate the speed: “By distance/time” or “Recorded by device”

        Unfortunately the speed with GPS only didn’t improved very much after the latest firmware update if I calculate the speed by distance/time:
        1.png

        If I calculate the speed by “Recorded by device” it started to look a bit better:
        2.png

        The move with GPS+GLONASS however looks much cleaner if the speed is recorded by distance/time. Especially the second half
        3.png

        Is this because of a better/stronger signal if I combine GPS+GLONASS?

        So it looks like the firmware update solved the speed wobble a little bit, but not quite like the Ambit 3 Peak. The speed spikes are also visible on the watch screen during the move, so it isn’t only the FIT file.

        Suunto Vertical Titanium Solar
        OnePlus Nord 4

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