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    Suunto 9 Highly inaccurate speed readings

    Scheduled Pinned Locked Moved Suunto 9
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    • surfboomerangS Offline
      surfboomerang
      last edited by

      Thanks, I will try that this evening.

      Suunto Vertical Titanium Solar
      OnePlus Nord 4

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      • surfboomerangS Offline
        surfboomerang
        last edited by

        @Dimitrios-Kanellopoulos I exported the same activities as before, but this time from Strava with the method you mentioned. Worked like a charm!
        After that I analyzed it in the Quantified Self site, but unfortunately the graphs for windsurfing are identical to the one I exported from Sports-tracker. So the spikes and drops are still there.

        I also did a new run today with the heart rate belt and some contact gel, but I still see the spikes in the heart rate graph. The Suunto App shows the HR graph ok (so it filters out the spikes)

        Suunto Vertical Titanium Solar
        OnePlus Nord 4

        Brad_OlwinB Dimitrios KanellopoulosD 3 Replies Last reply Reply Quote 1
        • Brad_OlwinB Offline
          Brad_Olwin Moderator @surfboomerang
          last edited by

          @surfboomerang said in Suunto 9 Highly inaccurate speed readings:

          @Dimitrios-Kanellopoulos I exported the same activities as before, but this time from Strava with the method you mentioned. Worked like a charm!
          After that I analyzed it in the Quantified Self site, but unfortunately the graphs for windsurfing are identical to the one I exported from Sports-tracker. So the spikes and drops are still there.

          I also did a new run today with the heart rate belt and some contact gel, but I still see the spikes in the heart rate graph. The Suunto App shows the HR graph ok (so it filters out the spikes)

          For HR, it is likely your belt is bad, not the sensor. When I routinely see HR spikes and I have cleaned the belt, it is time for a new one. Also, spikes can be worse in the winter if you wear fabrics that transmit a lot of static electricity.

          Vector/T6c/Ambit 3 Peak/S5 Copper/S3/S7 Ti/S9 baro Ti/S9P Ti/S9PP Ti/Vertical Ti/Race Ti/RaceS/Ocean/Wing

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

            @surfboomerang I need to add filtering at that tool then 😮

            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 btw joke as these spikes are natural to happen with others as well.

              Now back to the windsurf issue. Could you for just my sake use a swim profile or standuppaddling? Some water profile that is designed for on water GPS. I suspect that is the issue. SUP will do I think to make the gps more relaxed on reflections.

              S9 uses different GPS profiles for each type of movement. FYI

              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

                Always worth a try.

                Although I doubt that it will work because I’ve seen this same behaviour in a car on cruise control. See https://forum.suunto.com/post/16076. I used sports profile ā€œOtherā€ there. (or at least I think it is translated to ā€œOtherā€)

                I will try with the SUP profile for windsurfing next time. Hoping for some good wind in the near future. And of course some free time šŸ™‚

                Suunto Vertical Titanium Solar
                OnePlus Nord 4

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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

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                                  • 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

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                                    • surfboomerangS Offline
                                      surfboomerang @Dimitrios Kanellopoulos
                                      last edited by surfboomerang

                                      @Dimitrios-Kanellopoulos This time I used the sports mode ā€œOtherā€, but I have seen this behaviour also with ā€œWindsurfingā€.

                                      I checked a move that I did yesterday. I selected the profile ā€œRunningā€ 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

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                                      • 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

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                                          • 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

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