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    Suunto 9 Highly inaccurate speed readings

    Scheduled Pinned Locked Moved Suunto 9
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    • G Offline
      GingerBeardMan Bronze Member
      last edited by

      I find, when running, if I do fartleks, intervals or other workouts that include quick changes of pace my suunto 9 will log me as having achieve super human speeds at the beginning of the interval before settling down to something more realistic.

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      • surfboomerangS Offline
        surfboomerang @Dimitrios Kanellopoulos
        last edited by

        @Dimitrios-Kanellopoulos Because the wind forecast is not very good in the near future, I decided to test the profiles by car to see if the SUP or WIndsurf profile does make a change.

        I started an activity with a SUP profile and drove on the highway with the car on cruise control (about 110 km/h). Below is the resulting graph:

        Capture SUP profile.PNG

        I also did the test with the Windsurfing profile (cruise control at 100 km/h):
        Capture Windsurfing profile.PNG

        The windsurf profile looks pretty clear this time, but I doubt that this is because of the profile I think I was lucky with such a clean graph this time. As you can see on my first graph it can still spike really up and down.

        What really grind my gears is that the spikes are almost always identical in height and in a lot of the cases has the same drop value as the spike a second before.

        An example to clarify:
        If I drive an average of 110km/h and I see a spike of 120km/h, in a lot of cases it follows the next second with a drop to 100km/h. So it averages again to 110km/h, but the recorded max speed is 120km/h

        It is so common that the spikes are almost identical in height and drops that I can’t really imagine that this is a GPS reception issue. More like a GPS recording issue. Like the watch is recording too fast ahead and than slowing down to compensate…

        If you look at the line below, I see that the trackpoints are perfectly in line with the driving direction, but they do not have even distance between them some are closer of further apart, although I was driving at a constant speed.
        Capture points.PNG

        Is there a possibility to see the number of satellites or reception quality from the recordings?

        Suunto Vertical Titanium Solar
        OnePlus Nord 4

        Dimitrios KanellopoulosD 2 Replies Last reply Reply Quote 2
        • Dimitrios KanellopoulosD Offline
          Dimitrios Kanellopoulos Community Manager @surfboomerang
          last edited by

          @surfboomerang keep in mind that the spikes are vise versa. Aka you stopped.

          Community Manager / Admin @Suunto
          Creator of Quantified-Self.io
          youtube.com/c/dimitrioskanellopoulos
          https://instagram.com/dimitrioskanellopoulos
          https://www.strava.com/athletes/7586105

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          • Dimitrios KanellopoulosD Offline
            Dimitrios Kanellopoulos Community Manager @surfboomerang
            last edited by

            @surfboomerang I am working on QS v2 to show those differently and support more data btw

            Community Manager / Admin @Suunto
            Creator of Quantified-Self.io
            youtube.com/c/dimitrioskanellopoulos
            https://instagram.com/dimitrioskanellopoulos
            https://www.strava.com/athletes/7586105

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            • surfboomerangS Offline
              surfboomerang
              last edited by

              Little status update:
              Suunto support requested to return the watch for investigation.

              Lets see if they can find something…

              Suunto Vertical Titanium Solar
              OnePlus Nord 4

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              • surfboomerangS Offline
                surfboomerang
                last edited by surfboomerang

                Watch is replaced by Suunto support. Just got my new one.
                My first run looks promising. No real spikes like I had before. I’ll test high speed sports soon to see if my issue is really resolved.

                Suunto Vertical Titanium Solar
                OnePlus Nord 4

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                • surfboomerangS Offline
                  surfboomerang @Dimitrios Kanellopoulos
                  last edited by

                  @Dimitrios-Kanellopoulos The new version of the app looks great btw!!

                  Is it possible that the suunto 9 doesn’t record all the fields you have in the app? (like battery level, GPS satellite status etc…).
                  Because I selected those settings in my profile settings, but the data was not available in the graph.

                  Suunto Vertical Titanium Solar
                  OnePlus Nord 4

                  Dimitrios KanellopoulosD 1 Reply Last reply Reply Quote 0
                  • Dimitrios KanellopoulosD Offline
                    Dimitrios Kanellopoulos Community Manager @surfboomerang
                    last edited by

                    @surfboomerang those fields are recroding just not exported. You need the SML files and I still dont have support for those. However I will add as it’s at least the last feature I ll push for now.

                    Regarding my data that have those fields that is because we use another tool internal to extract those data

                    Community Manager / Admin @Suunto
                    Creator of Quantified-Self.io
                    youtube.com/c/dimitrioskanellopoulos
                    https://instagram.com/dimitrioskanellopoulos
                    https://www.strava.com/athletes/7586105

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                    • surfboomerangS Offline
                      surfboomerang
                      last edited by

                      Bringing an old topic back to life after firmware update 2.8.28…

                      @Dimitrios-Kanellopoulos and @dirty-hippie
                      Unfortunately the speed spikes are still not correctly filtered for my case. I did two testruns today. One with GPS only and the other one with GPS+GALILEO.

                      I was driving a steady 57km/h during this run

                      Below are the results:

                      GPS Only
                      Capture.PNG

                      GPS+GALILEO
                      Capture2.PNG

                      Suunto Vertical Titanium Solar
                      OnePlus Nord 4

                      Dimitrios KanellopoulosD 1 Reply Last reply Reply Quote 0
                      • Dimitrios KanellopoulosD Offline
                        Dimitrios Kanellopoulos Community Manager @surfboomerang
                        last edited by

                        @surfboomerang Ok. Thanks for this.

                        I will have to escalate this. I would like to know how much this can happen in other modes.

                        Btw what sport mode do you use? PErhaps there is different bahaviour per sport mode?

                        Community Manager / Admin @Suunto
                        Creator of Quantified-Self.io
                        youtube.com/c/dimitrioskanellopoulos
                        https://instagram.com/dimitrioskanellopoulos
                        https://www.strava.com/athletes/7586105

                        surfboomerangS 1 Reply Last reply Reply Quote 0
                        • surfboomerangS Offline
                          surfboomerang @Dimitrios Kanellopoulos
                          last edited by surfboomerang

                          @Dimitrios-Kanellopoulos This time I used the sports mode “Other”, but I have seen this behaviour also with “Windsurfing”.

                          I checked a move that I did yesterday. I selected the profile “Running” and had GALILEO on.
                          Capture3.PNG

                          So it looks like it happens on all sport modes, but the spikes (and dips) are greater for sports with higher speeds

                          Suunto Vertical Titanium Solar
                          OnePlus Nord 4

                          Dimitrios KanellopoulosD 1 Reply Last reply Reply Quote 0
                          • Dimitrios KanellopoulosD Offline
                            Dimitrios Kanellopoulos Community Manager @surfboomerang
                            last edited by

                            @surfboomerang what files are you reading ?

                            Community Manager / Admin @Suunto
                            Creator of Quantified-Self.io
                            youtube.com/c/dimitrioskanellopoulos
                            https://instagram.com/dimitrioskanellopoulos
                            https://www.strava.com/athletes/7586105

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                            • surfboomerangS Offline
                              surfboomerang
                              last edited by surfboomerang

                              @Dimitrios-Kanellopoulos The files above are GPX exports from Runalyze.

                              Suunto Vertical Titanium Solar
                              OnePlus Nord 4

                              Dimitrios KanellopoulosD 1 Reply Last reply Reply Quote 0
                              • Dimitrios KanellopoulosD Offline
                                Dimitrios Kanellopoulos Community Manager @surfboomerang
                                last edited by

                                @surfboomerang I would prefer to look at the fit file.

                                Do you have some SA link for me of the files with these issues ?

                                Community Manager / Admin @Suunto
                                Creator of Quantified-Self.io
                                youtube.com/c/dimitrioskanellopoulos
                                https://instagram.com/dimitrioskanellopoulos
                                https://www.strava.com/athletes/7586105

                                surfboomerangS 1 Reply Last reply Reply Quote 0
                                • surfboomerangS Offline
                                  surfboomerang @Dimitrios Kanellopoulos
                                  last edited by surfboomerang

                                  @Dimitrios-Kanellopoulos I sent you the links in a pm

                                  Suunto Vertical Titanium Solar
                                  OnePlus Nord 4

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                                  • surfboomerangS Offline
                                    surfboomerang
                                    last edited by

                                    <Frustration mode>

                                    Can someone tell me if this issue is resolved in the upcoming firmware update?
                                    I did a windsurf session today on a rainy day and I had GPS+Galileo on. The picture below shows a segment of a track that is almost 100 km like this.
                                    As you can see it is a horrible recording of speed!!! 😫 😫

                                    Annotation 2019-10-06 165047.png
                                    </Frustration mode>

                                    Suunto Vertical Titanium Solar
                                    OnePlus Nord 4

                                    freeheelerF Dimitrios KanellopoulosD 2 Replies Last reply Reply Quote 1
                                    • freeheelerF Offline
                                      freeheeler @surfboomerang
                                      last edited by freeheeler

                                      @surfboomerang
                                      I just compared my recordings from a3p to s9b within SA… s9b indeed gives a spikier graph… strange!

                                      a3p: https://app.suunto.com/move/skiingone/5d836edd58e211b5ae86859e

                                      s9b:
                                      https://app.suunto.com/move/skiingone/5d921b3c58e2111193c1ec1c

                                      living sideways

                                      surfboomerangS 1 Reply Last reply Reply Quote 0
                                      • freeheelerF Offline
                                        freeheeler
                                        last edited by

                                        and just noticed that the exported link displays my highest point of 948m as ascent… 👎

                                        living sideways

                                        fejkerF 1 Reply Last reply Reply Quote 0
                                        • surfboomerangS Offline
                                          surfboomerang @freeheeler
                                          last edited by

                                          @TELE-HO I haven’t seen those spikes with my old a3p either. Only with my s9 baro.

                                          Suunto Vertical Titanium Solar
                                          OnePlus Nord 4

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                                          • Dimitrios KanellopoulosD Offline
                                            Dimitrios Kanellopoulos Community Manager @surfboomerang
                                            last edited by

                                            @surfboomerang should be. Wait for end Oct

                                            Community Manager / Admin @Suunto
                                            Creator of Quantified-Self.io
                                            youtube.com/c/dimitrioskanellopoulos
                                            https://instagram.com/dimitrioskanellopoulos
                                            https://www.strava.com/athletes/7586105

                                            surfboomerangS 2 Replies Last reply Reply Quote 1
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