I have never been particularly impressed with the GPS tracking of my Edge 520 since purchasing it in December. At best, I would say it is on a par with my sub £100 Android phone, but no better.
I have never seen anything as bad as my ride yesterday though.
Most of my ride tracked OK, but there was a stretch of over 2 kilometres where the tracking was seriously off. (Up to 80m) - See the attached image.
Riding from the south, it started to go off as soon as I went through some woods. What's baffling me, however, is that the second half of that section, (about 1km), is also badly off, even though I was out of the trees with a clear view of the sky.
The image on the right is from my Android phone, which tracked this section perfectly well. (It was in a soft case, wrapped in a plastic bag, in my back pocket).
How come a 4 year old £80 Android phone can track better than a dedicated GPS cycling computer?
(Note, both my firmware and GPS software are the latest versions. I was using GPS only - until recently I had always used GPS + GLONASS, but some people actually seem to get better tracking with GPS only which was why I was trying it).
