You are reading a single comment by @Sparky and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@Sparky
Mine was faster today. I've also found one windowsill where I can get a signal. I then hit start and get ready and head out of the door. It complains that it's lost the signal, but at least it has a start point. Then a little way down the road it finds it again and it looks accurate, leaving from my house. I think there's some truth in the story Hippy pointed to, in that they learn where the satellites should be and do some maths to compensate for their drift over time. Having said that, to compensate for drift it needs to know the time, and the Garmins automatically set their time on GPS signals, so it must have to find one satellite before it can use that trick and lock on to the others faster.