Forerunner 955 GPS Problem

Awesome!!!

Have had similar problem. I you on FW 15.XX so try to use GPS - Auto select / Data Recording - Smart. It solved problems with gps on my fr955s. Hope it will be like this further... Also please see following topics:

1) https://forums.garmin.com/sports-fitness/running-multisport/f/forerunner-955-series/326433/gps-problem-in-first-4-6-minutes

2) forums.garmin.com/.../inaccurate-gps-tracking-after-update-12-23-on-fr-955

Thank you for the information. I currently have version 15.12 installed and it seems to be consistent. I will run a half marathon on Sunday and we will see the result together. I will be adding the result here. 

You are referring to some quite old links so they are of no real usage here.

And I would say that you should probably NOT  use Smart recording but one second recording. Garmin states this themselves too:

If you need a longer battery life or need to make sure you have more space for a longer activity, you will want to choose Smart Recording. If you want more accuracy and a track that follows your movement based on points that are recorded more often, you will want to choose Every Second Recording.

Tell me please. Have you ever had this GPS problem? I have been researching this problem for almost a year. The links to the topics may be old, but are still relevant to many people.

What makes you think that every second recording mode is better than intelligent mode? Just because of Garmin said that? I'll tell you a secret - they can be wrong. sometimes they just don't know what to do. I have a clear example of how a track is recorded after an update. In various options. What do you have to offer?

I can prove by experience that smart recording mode + gps all system gives better results on the current firmware 15.11 than in others.

https://connect.garmin.com/modern/activity/9775012298 - every second + multi-band

https://connect.garmin.com/modern/activity/10976772689 - smart mode + all system

You will probably have a warm-up workout. try the suggested options beforehand on Saturday. And good luck at the marathon!))

Yes I had GPS issues on FW 12.23 just like you and everyone else at it was NOT related to the every second setting. You cannot compare a these to recordings - they are not the same FW! 

And Garmin is NOT wrong on this one. This is how it has been working for years... even decades. 

Anyone running on a GPS version 2.37 are fine. Only problem is if they as stated earlier that they have moved many miles from last activity OR CPE/EOP files/data has expired. Beta FW 15.09 and above are also fine especially because the GPS Version is not 2.42 wich was the buggy one.

Catch one more example with the same fw

https://connect.garmin.com/modern/activity/10960802021?share_unique_id=201

I have done some experimenting with Smart vs Every Second data recording. From what I can tell, it has very little affect on the actual GPS track. I believe Smart Recording simply attempts to get rid of duplicate data points that appear in succession, like a heart rate that stays the same for 10 seconds will be reduced to one data point rather than 10.

It should be noted that when viewing GPS tracks on Garmin Connect, you are not seeing all of the recorded points, even if you are using Every Second recording. It looks like it only shows only every 3rd or 4th point from what I can tell. If you upload your trace to a separate viewer (I like https://quantified-self.io myself), you'll see a lot more points show up. I think Garmin does this to ease the rendering processing.

If I look at a trace created using Smart Recording on a site like above, it still appears to show points being created every second. I typically run on forested trails, so I rarely hit a straightaway, so that may have something to do with it. But I don't really see any smoothing or dropped points as a result of using Smart Recording.

That being said, I agree with you and use Every Second anyways, because, why not?