General minor problems.

[AndyP]

GPS speed glitches
GPS speed in-accurate
GPS loss of lock, and fails to recover.


1) It can glitch high by up to 8km/h, just briefly then snap back down to the correct value.

Phone
http://www.strava.com/activities/157621543/analysis
Leikr
http://www.strava.com/activities/157622280/analysis

Notice peaks ~20.5km and 22km on the Leikr log not on the phone (Nexus 5) log.
(I'll try and generate truncated logs to make it more obvious.)


2) I finally decide the Leikr was reliable enough to use as my primary GPS tracking device, only got get caught out. No phone log for reference unfortunately.
In this case I was travelling at about 30km/h for the first few km, not 43+ as shown.
I assume the heart rate is just the strap HRM, and not a Leikr problem.
http://www.strava.com/activities/157871858/analysis

In addition, the Leikr lost lock and failed to recover. It should have had good almanac and ephemeris data since since it had a good satellite lock. Also since it had a good GPS lock, then time was well defined, it should have had everything needed for a quick re-lock.
Since the Leikr was then spending a long time scanning for satellites the battery run flat quickly and was almost flat by the end of my commute, and didn't have enough charge for the commute home.

LKR1 - ser no. 00000368

[hdoehler]

I had same experience with LEIKR also under free sky view conditions , while Sony xperia ray have better GPS data and no missed lock.
Speed glitches typicaly happens near Stop/Start mode with low #satelite.
The inaccurate speed values follow the fast jumping position track around the real position.
If anybody ist interest in tracking data i try to reproduce it in town with 3-4 satelite.