Running in a tunnel caused issues in the total distance computation

[sky-runner]

@tuxella I suspect the watch may be double counting the tunnel distance in this case - the first time from accelerometer and the second time from GPS when it reacquures the GPS signal. The easiest way is to download the FIT file and inspect the distance over time in it, and see if there are any sharp jumps in the distance. In my experience Ambit3 had exactly the same issue, which I observed several times.

[Dimitrios Kanellopoulos]

@sky-runner we have fixed this issue quite some fw before.

[tuxella]

This “double counting” theory could explain the results I get.

I analysed the data in the Suunto fit file from the 30/03/2021 :

The first time in the tunnel (difference between the first and the last point without coordinates):

• Distance: 0.87 km
• Time: 4:15
• Speed: 12.28 km/h

On the way back (in the same tunnel):

• Distance: 0.88 km
• Time: 4:19
• Speed 12.23 km/h

If I add these distances to the distance calculated from GPS coordinates of each point:

7.74 + 0.87 + 0.88 = 9.49km

Where the total distance in the fit file (and reported in Suunto App, QS, Runalyze, Strava…) is 9.58 km

[Dimitrios Kanellopoulos]

@tuxella can you make the links of qs public ? You can easily see if it’s that bug which was fixed

Currently I cannot open those links

[tuxella]

@dimitrios-kanellopoulos They should be public now

[Dimitrios Kanellopoulos]

@tuxella are you using a pod ?

[tuxella]

@dimitrios-kanellopoulos No, this activity was done with just a Suunto S9 and the HR belt

[Dimitrios Kanellopoulos]

@tuxella I’ll take a better look when I am on my pc.

I do see the issue.

[tuxella]

@dimitrios-kanellopoulos Cool

Have a nice week-end

[ddausw]

@tuxella
I have the same problem with the s9b after the last FW update. The tunnel length is counted twice. I tested with Glonass as well as Galileo.

Dieter

[MiniForklift]

Nice pace! Just gave you kudos

[tuxella]

@miniforklift Thanks

[tuxella]

@dimitrios-kanellopoulos Hello

did you have the opportunity to check on this?

[Dimitrios Kanellopoulos]

@tuxella I reported a bug or the watch guys.I think this new FW re introduced the issue

[Dimitrios Kanellopoulos]

@tuxella I would like some suunto app links

[tuxella]

@dimitrios-kanellopoulos

For the 30/03/2021: https://www.suunto.com/fr-fr/move/thomas430851/606310cf949ba71fa290dc8a

For the 09/03/2021: https://www.suunto.com/fr-fr/move/thomas430851/60476ac697a7b66e0c4c5d8a

[tuxella]

@dimitrios-kanellopoulos I had this issue twice: on the 30/03 and on the 09/03.

On the 09/03 I wasn’t using the “new firmware” (which was released on the 30/03 AFAIK)

[Dimitrios Kanellopoulos]

@tuxella I did open a bug report in any case… Something is wrong here.

Strangely while I tested this I didn’t get this issue. so lets let the watch guys figure this out.

[tuxella]

@dimitrios-kanellopoulos Thank you

[Likarnik]

@Dimitrios-Kanellopoulos I had same issue two days ago, but I think never before (I ran quite a lot under that tunnel). I thought it was just a glitch before I saw this topic Will it help with my link too?