Often in the past discussed, now a historic problem since the old
Summit, still with it, is no longer being upgraded, and there is a new
upgraded Summit with a 10,000 point tracklog. I've sometimes suspected
this might be a generic problem with Garmin's sensor models, since
something like it is sometimes reported with other sensor models,
although if they have enough tracklog it isn't a serious problem.
Well, the barometric pressure has been pretty stable lately, most
unusually so. And in doing some comparative tests I left my Summit
switched on in a good sat view position for hours, a few times. I was
astonished to find it was only producing a few trackpoints an
hour. Sometimes it produced as many as ten in an hour, sometimes only
three. In previous tests like this it has produced at least many
dozens of trackpoints while stationary, often more than one a minute.
So it looks as though at least part of the bug is simply
oversensitivity to changes in barometric pressure. I wonder if Garmin
due their testing somewhere with a more stable barometric pressure than
Britain usually is?
--
Chris Malcolm [email hidden] +44 (0)131 651 3445 DoD #205
IPAB, Informatics, JCMB, King's Buildings, Edinburgh, EH9 3JZ, UK
[http://www.dai.ed.ac.uk/homes/cam/]