I'm having some problems with GPS accuracy. I come from a m400, cheaper, also I had incorrect measurements,but It always convinced more or less . Yesterday my session with the 935, gps + glonaglass activated, I knew that I was not giving the right rhythm, and when I saw the position, in an open circuit, I was always out of the way, cutting the distance considerably. What do you activate GPS only, GPS + Glonaglass or GPS + Galileo. GPS + Galileo , seems to be slower to display current speed... or is something in the older version of the firmware???
robertinmc can you post link to activity. I generally found my 935 to be accurate GPS wise. Whether you have Glonass or GPS on is very much down to how it performs in your area - so try it and see. Have you made sure you have a good GPS fix before you start the activity as that can have a big impact?
The problems are in the area where I take several laps. I in the sidewalk, not up the buildings. It is an area that I frequent a lot, and I assume normal deviations, not that systematically in each. Is open area. GPS signal , always is Ok when I starts, and frist steps is ok. Mybe , I go under a road, but , It's not closed, and later, It must recoverd the position or stalites.
I know, but it's hard to believe that including gonaglass or galileo can do that works worst. It should be the opposite. Current speed/actual, I even think that this is more accurate than my previous device, as long as it does not make me strange things like yesterday.