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    Same trail and very different ascent/descent

    Scheduled Pinned Locked Moved Suunto 9
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    • Bogdan1921B Offline
      Bogdan1921 Silver Members Bronze Member
      last edited by Bogdan1921

      Hello,
      In 2020 I was on an hiking trail and this month I’ve repet it.
      In 2020 the data looks good (the peak of the mountain it’s at 2190m) but the data from this year looks not great (big difference on ascent/descent).
      The watch was sync before the start, and calibrated. It’s not the first time when I see that this data are not pretty relevant.
      Also the watch is updated at the latest version.
      What can be the issue?
      Thanks

      2020: https://ibb.co/fkcLGXX
      2023: https://ibb.co/C57yb8P

      Suunto Race
      Polar H10
      Iphone 14 Pro
      Suunto 9 Baro [sold]

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      • zhang965Z Offline
        zhang965
        last edited by

        Hello,

        No man ever steps in the same river twice.

        I’ve just checked my previous runs which are in the same place, I never get similar ascent/descent with S9/s9p/S9PP/SV

        Winners Wear Winners

        Bogdan1921B 1 Reply Last reply Reply Quote 0
        • Bogdan1921B Offline
          Bogdan1921 Silver Members Bronze Member @zhang965
          last edited by

          @zhang965

          Yes but the difference is to much:

          Ascent for example: 1102 vs 2106

          Suunto Race
          Polar H10
          Iphone 14 Pro
          Suunto 9 Baro [sold]

          zhang965Z 1 Reply Last reply Reply Quote 0
          • zhang965Z Offline
            zhang965 @Bogdan1921
            last edited by

            @Bogdan1921

            I got 60m vs 24m same place in 2 weeks

            Winners Wear Winners

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            • E Offline
              el2thek Bronze Member @Bogdan1921
              last edited by

              @Bogdan1921 the 2020 graph is a lot smoother. Did you have something covering the watch (like a sleeve) this time. I have read that something covering the baro sensor can cause changes in pressure and as a result affect the altitude reading.

              Bogdan1921B 1 Reply Last reply Reply Quote 2
              • Bogdan1921B Offline
                Bogdan1921 Silver Members Bronze Member @el2thek
                last edited by

                @el2thek
                Yes, this time I had a long sleeve jacket.

                Suunto Race
                Polar H10
                Iphone 14 Pro
                Suunto 9 Baro [sold]

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                • ? Offline
                  A Former User @Bogdan1921
                  last edited by

                  @Bogdan1921 unless it was an air tight sleeve, it shouldn’t matter that much IMHO.

                  The way altitude gain/loss is calculated might be different between the 2020 and 2023 firmware… wild guess.

                  isaziI 1 Reply Last reply Reply Quote 0
                  • zhang965Z Offline
                    zhang965
                    last edited by zhang965

                    FusedAlti™
                    FusedAlti™ provides an altitude reading that is a combination of GPS and barometric altitude. It minimizes the effect of temporary and offset errors in the final altitude reading.

                    NOTE:
                    By default, altitude is measured with FusedAlti during exercises that use GPS and during navigation. When GPS is switched off, altitude is measured with the barometric sensor.

                    https://www.suunto.com/en-gb/Support/Product-support/suunto_vertical/suunto_vertical/settings/fusedalti/

                    Winners Wear Winners

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                    • isaziI Offline
                      isazi Moderator @Guest
                      last edited by

                      @twekkel how ascent and descent are compute changed in 2021 with the introduction of a new algorithm, although difference should not be this large. It was very windy and/or rainy this year?

                      Watch: Suunto Vertical Ti

                      Blog: isazi's home

                      Bogdan1921B 1 Reply Last reply Reply Quote 0
                      • Bogdan1921B Offline
                        Bogdan1921 Silver Members Bronze Member @isazi
                        last edited by

                        @isazi

                        It was approximaty the same conditions, without rain.

                        Suunto Race
                        Polar H10
                        Iphone 14 Pro
                        Suunto 9 Baro [sold]

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                        • isaziI Offline
                          isazi Moderator @Bogdan1921
                          last edited by

                          @Bogdan1921 strange, the alti profile is definitely more nervous in 2023, something was bothering the baro sensor it seems. I would clean the watch to be sure nothing is clogging the sensor from the inside, but it looks like something was pushing air in and out.

                          Watch: Suunto Vertical Ti

                          Blog: isazi's home

                          Bogdan1921B 1 Reply Last reply Reply Quote 1
                          • Bogdan1921B Offline
                            Bogdan1921 Silver Members Bronze Member @isazi
                            last edited by

                            @isazi

                            Yes that’s the next step, I will clean the watch and see in the feature how it works. Thanks

                            Suunto Race
                            Polar H10
                            Iphone 14 Pro
                            Suunto 9 Baro [sold]

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