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(Known Issue) GPS accuracy on Jan 01 2021?

Just had a run with my 945. GPS was way off during the run, I mean about 50-100 meters off reality during the whole route.

Has anyone else had this today? Using GPS+Glonass setting.

Janne / Finland

Top Replies

CloggyAbroad over 3 years ago +15

I have done a few more experiments and think I have worked out what is going on.

Before going for a run today I connected to GC on my PC and did a sync. I verified the CPE had downloaded correctly by checking…
seilogramp over 3 years ago +13 verified

Not impacting everyone, but it is a system-wide issue impacting multiple device types, not only Garmin devices.

From Garmin's support site - The Activity GPS Track From My Garmin Watch Is Inaccura…
DavidJJones over 3 years ago in reply to CloggyAbroad +8

I've just done some work today, and you can take the GPX file and make a manual adjustment to the lon / lat and correct it.

It would be too labour intensive, so I made a small python file to make the…

All Replies

0 Gillfee over 3 years ago

hab das gleiche Problem, CPE lässt sich nicht erneuern

0 the5krunner over 3 years ago in reply to CloggyAbroad

i think it takes about 12.5 minutes from memory (seriously)

that same download happens when you are working out as well (with some caveats)

0 JoseR over 3 years ago in reply to the5krunner

Yep, for 10-15 min my watch thought I was in the middle of the Hudson River but after that suddenly it got the right position. It was kind of annoying but at least the workout ended up well.

0 Dr Phil over 3 years ago

The CPE file could well be the difference then. I always give my watch a few minutes before starting any activity - basically I turn it on while I'm getting ready to start. Those few minutes are likely the difference needed to get the satellite data updated.

0 jdt80 over 3 years ago

How do you update the cpe file? I’ve tried syncing my watch on both the app and by connecting to my computer but it’s still showing as expired

0 jmto over 3 years ago in reply to jdt80

There is no known way to update CPE to CURRENT. You can try to get it from the satellite but I tested it and it didn't work either, YMMV.

0 jmto over 3 years ago in reply to jmto

And another update on the Fenix side:
https://forums.garmin.com/outdoor-recreation/outdoor-recreation/f/fenix-6-series/250026/known-issue---gps-accuracy-issues-starting-january-1st-2021/1190010#1190010

https://support.garmin.com/en-US/?faq=tVqfHodoCP4WgTbssnysI7&productID=702902&tab=topics

Long soak before activity...

0 Andras over 3 years ago in reply to CloggyAbroad

This might be true. I had a run on 1st of Jan with the offset in my results. 945, GPS+Glonass, Hungary, Central Europe. I did a soft-reset then. Today I went on hiking and after 25 mins realized the same inaccuracy - I was try to change GPS from GPS+Galileo to GPS+Glonass in-flight but that had no effect. Then I put the activity on pause + "resume later" then resumed - and the position jumped to the correct place. Note, simple pause+resume did not fixed the posiotion, I had to "stop" the activity and restart with "resume later". So indeed after 15+ mins GPS data is fixing itself - even during an activity I assume, however has effect on a newly started/restarted activity only. I haven't tried to change back to GPS+Glonass from GPS+Galileo but I think that shall have no effect - there should be no Galileo coverage in Europe, so GPS+Galileo = GPS only here I assume.

+1 who knows over 3 years ago in reply to Andras

Andras said:
Anyway, shame on Garmin

You're pointing your finger in the wrong direction. Coros, Suunto and Garmin are all having the issue. The common denominator? The watches with the newer Sony chipset. It's like blaming BMW for the faulty Takata Airbag that 17 other automakers used too.

0 Zenginerd over 3 years ago

Just finished 6 mile run, no problems at all.