Suunto app Forum Suunto Community Forum
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Register
    • Login

    Suunto 9 Highly inaccurate speed readings

    Scheduled Pinned Locked Moved Suunto 9
    42 Posts 6 Posters 2.7k Views 8 Watching
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • 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

      1 Reply Last reply Reply Quote 0
      • 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

        1 Reply Last reply Reply Quote 0
        • 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

          surfboomerangS 1 Reply Last reply Reply Quote 1
          • 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 “Other” there. (or at least I think it is translated to “Other”)

            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 🙂

            Suunto Vertical Titanium Solar
            OnePlus Nord 4

            1 Reply Last reply Reply Quote 1
            • 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.

              1 Reply Last reply Reply Quote 0
              • 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

                  1 Reply Last reply Reply Quote 0
                  • 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

                    surfboomerangS 1 Reply Last reply Reply Quote 0
                    • 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

                      1 Reply Last reply Reply Quote 0
                      • 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

                        1 Reply Last reply Reply Quote 2
                        • 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

                            1 Reply Last reply Reply Quote 0
                            • 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

                                    1 Reply Last reply Reply Quote 0
                                    • 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

                                          1 Reply Last reply Reply Quote 0
                                          • 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
                                            • First post
                                              Last post

                                            Suunto Terms | Privacy Policy