Partial loss of GPS data?

Former Member over 6 years ago

I did a triathlon race today with my fenix 5 plus, indoor pool swim, came our into T1 - GPS picked up instantly no problem. Out onto the bike, it picked up the first point at which I started the bike leg but nothing afterwards. Back into T2 and run, fine again. So for some reason it would appear to have lost GPS location just as I started the bike leg, yet still tracked my speed etc fairly accurately but without any GPS waypoints, no map and no Strava segments :( Could the data still be in the FIT file created but perhaps just corrupted? Is it retrievable?

0 Former Member over 6 years ago

Former Member

without the file, no solution

check if you can repair your file with help of FitFileRepairTool

upload the fit file here and check if GPS data is present after T1

with your consent we can have a look at your file with FitFileRepairTool

zip the fit file and upload here in the forum, or provide a link to it on a cloud storage

happy & safe sporting

0 Former Member over 6 years ago in reply to Former Member

I had a look at the file using the FFRT, however the trial version suggests that some of the data is removed. Despite that, the position coordinates for the Cycling section don't appear to be present at all (whereas T1 and run are). Interestingly the coordinates for the run appear to be all identical - unless that is the limitation of the trial version? In which case, I presume that it won't be as simple as inputting identical coordinates for the cycle leg.

2019-07-14-09-15-24.zip

0 Former Member over 6 years ago in reply to Former Member

Former Member

congratulations on the triathlon

as you already noticed...

no gps data logged at all in the fit file during your bike session

T1 and T2 have gps trackings saved in the fit file

starting the bike session GPS reception is recognized and saved in the fit file header

bike session speed and distance data are logged from GPS source

no GPS coordinates are logged during bike session

bike laps are one mile while running laps are one km

GPS logging is setup to be recorded, but it does not record GPS coordinates in the data records

very strange behaviour

Definition,0,record,timestamp,1,,position_lat,1,,position_long,1,,distance,1,,altitude,1,,speed,1,,unknown,1,,heart_rate,1,,temperature,1

Data,0,record,timestamp,"932027199",s,distance,"833.46",m,altitude,"209.62",m,speed,"3.722",m/s,unknown,"300",,heart_rate,"173",bpm,temperature,"24",C,enhanced_altitude,"209.62",m,enhanced_speed,"3.722",m/s

so, nothing there in need for a repair

perhaps time for a reset or a simple long press on the light button until the screen goes dark

but anyway

happy & safe sporting

0 Seren over 6 years ago

I wonder if it has something to do with the recent Galileo outage...the whole constellation was/is offline (suprised if it still is)?

0 Dr Phil over 6 years ago in reply to Seren

It is possible but the additional systems just augment the basic GPS so there should still be something. However, sometimes these things just happen. If it happens again, let us know here and contact Garmin Support.

0 Former Member over 6 years ago in reply to Former Member

"bike laps are one mile while running laps are one km" - by design due to my split personality.

I appreciate you taking the time to look into that. At least it's clear now that if it happens again, it's probably just the Garmin having an off day but hopefully there won't be any more issues. Thanks again.