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    Suunto 9 FusedAlti not remembered after activity

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    • sartoricS Offline
      sartoric Moderator
      last edited by sartoric

      @surfboomerang
      Well, altitude in normal mode is based on barometer measurements so it can be affected by weather changes and the altitude value you’ve set on watch.

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      • surfboomerangS Offline
        surfboomerang
        last edited by surfboomerang

        Normally I would agree, but not this time. It changed so rapidly after I ended an activity. And to almost the same value right before the start of the activity.

        The graph shows a time scale of 2 hrs. My activity was 1:40 so it changed within 10 minutes after the activity.

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        • surfboomerangS Offline
          surfboomerang
          last edited by

          I rebooted the watch and did a run today. Before the run the altitude was way too high. After a couple of minutes into the run I noticed that the altitude has been corrected to the right altitude. After I stopped the activity it remained the same altitude this time.

          So it looks like a one time error…

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          • Brad_OlwinB Offline
            Brad_Olwin Moderator
            last edited by

            I think this is normal behavior. It does not happen to me as I live at 1600m or 5200 ft and routinely see changes of 100-200 ft primarily due to changes in air pressure. Most of my exercises involve changes of 1000 ft or 300m in altitude. FusedAlti when working will adjust altitude to the correct by using aided GPS. If the air pressure during your exercise changes, that will be reflected in a change in altitude when you stop the exercise…not surprising. If you alitude changes are small, I expect this is more challenging for the watch.

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            • ? Offline
              A Former User
              last edited by A Former User

              Hopefully this is a better thread (I’ve just posted a comment in another one). Here is good example that demonstrates that FusedAlti adjustment isn’t remembered after ending an activity. The following two activities were recorded about 5 minutes one after another. As you can see FusedAlti kicked in both activities and made nearly the same adjustment:

              Screenshot_20190224-224212.png

              Screenshot_20190224-224257.png

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              • Brad_OlwinB Offline
                Brad_Olwin Moderator @Guest
                last edited by

                @silentvoyager Not clear on your post, what is not remembered? I see two separate graphs. Is there no change in your altitude? What happened to air pressure during this time?

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                • surfboomerangS Offline
                  surfboomerang @Brad_Olwin
                  last edited by

                  @Brad_Olwin what @silentvoyager is saying is that he sees the fused altitude working in the first graph within a few minutes. The first activity ends at an altitude of around 339m.

                  He starts the second activity 5 minutes later with an altitude of 258m. Such a huge difference can’t be from air pressure change in such a short time.

                  After a few minutes he sees the fused altitude working again because the altitude is corrected to 344m (almost identical as the end altitude of the first activity).

                  You would suspect that after the ending the first activity the altitude will stay at around 339m until he starts the second activity. If the second activity starts days after the first I can imagine the altitude has drifted off because of air pressure changes, bit not after 5 minutes.

                  @silentvoyager correct me if I understood your post wrong.

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                  • Brad_OlwinB Offline
                    Brad_Olwin Moderator @surfboomerang
                    last edited by

                    @surfboomerang said in Suunto 9 FusedAlti not remembered after activity:

                    @Brad_Olwin what @silentvoyager is saying is that he sees the fused altitude working in the first graph within a few minutes. The first activity ends at an altitude of around 339m.

                    He starts the second activity 5 minutes later with an altitude of 258m. Such a huge difference can’t be from air pressure change in such a short time.

                    After a few minutes he sees the fused altitude working again because the altitude is corrected to 344m (almost identical as the end altitude of the first activity).

                    You would suspect that after the ending the first activity the altitude will stay at around 339m until he starts the second activity. If the second activity starts days after the first I can imagine the altitude has drifted off because of air pressure changes, bit not after 5 minutes.

                    @silentvoyager correct me if I understood your post wrong.

                    The first activity ends at about ~214 and the second starts very, very close to that once Fused Altitude has initiated…are you saying the second should start at 215? Mine tends to remember as I can check altitude.

                    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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                    • Mff73M Offline
                      Mff73 @Brad_Olwin
                      last edited by

                      @Brad_Olwin
                      I think the first is your second and the second your first.
                      But maybe wrong.

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                      • ? Offline
                        A Former User @Brad_Olwin
                        last edited by

                        @Brad_Olwin The second one started 5 minutes after finishing the first one. The change in altitude between the two runs was insignificant. You can see a significant altitude adjustment at the beginning of the second run, which doesn’t make much sense to me.

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                        • ? Offline
                          A Former User @Brad_Olwin
                          last edited by

                          @Brad_Olwin, No 214 ft is where I started the first activity and where I returned to at the end of the second activity. Basically my run was interrupted because I met someone and stopped the run, but then decided to record the rest of it.

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                          • freeheelerF Offline
                            freeheeler
                            last edited by freeheeler

                            I’d like to roll up this ancient topic if I’m allowed to…
                            but with a somehow different basis of the question to you folks.
                            Did you ever notice that all your start altitudes that you start from a known point differ by several meters? My frequent starting alti is on 424m.
                            My activities sometimes show 404m on the graph up to 449m. But usually around 416m, hence 8m too low.

                            I know that FusedAlti kicks in after something like 15minutes but I remember that it changes the graph backwards in order to not only correct the altitude but also correct a potentially wrong start altitude, am I wrong?

                            What is your experience?

                            living sideways

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

                              …and while I’m already asking…
                              I went for a short ride along the lake (which is supposed to be a flat track) and I went to a shop (5th floor) while I paused my activity and later I found the following on the alti graph recording… I’ve restarted the activity exactly where I’ve stopped it some minutes before.

                              Screenshot_20210105-192111.png

                              living sideways

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

                                @TELE-HO temperature influence. That has not Todo with correction. If you stay inside it will get wrong gps altitude and temperature will be increasing or falling changing the altitude. That is why 20meters chnaged

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

                                  @TELE-HO fused alti does not work only in the first 15 minutes. This is chnages quite some time ago. It will try many times and additionally constantly correcting the altitude

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                                  • surfboomerangS Offline
                                    surfboomerang @freeheeler
                                    last edited by

                                    @TELE-HO I have never seen it correcting it from the start. Sometimes it takes 20-25 minutes to kick in and then I see the altitude gradually being corrected in the next few minutes.But the beginning of the activity still contains the wrong altitude.

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

                                      @surfboomerang you cannot see the correction of the altitude.

                                      There is the initial offset adjustment that you don’t see and after that during ie if the pressure chnages and it does not align with the altitude then it will gradually correct it.

                                      Note: -+10-20meters will be corrected slowly not fast during the activity not on offset.

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

                                        @TELE-HO in your specific example the correction happened when you existed the store most probably. Should not happen so much , and mostly it trusted the temperature.

                                        The fused alti is not designed so well for indoor and floors etc when gps is on (no indoor activity)

                                        Alternatively you could do multisport to indoor move and would help.

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                                        • surfboomerangS Offline
                                          surfboomerang @Dimitrios Kanellopoulos
                                          last edited by

                                          @Dimitrios-Kanellopoulos
                                          you mean this:
                                          2a3914e6-7e0b-44f4-8758-b8753ee37a0b-image.png

                                          The track should be flat, but it is slowly corrected to (almost) the right altitude in the end.

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                                          • freeheelerF Offline
                                            freeheeler @Dimitrios Kanellopoulos
                                            last edited by

                                            @Dimitrios-Kanellopoulos
                                            you mean it still wants to correct, even when paused?

                                            living sideways

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