Over de GPS,
ik heb op internet gevonden wat de opties in mobile uncle betekenen:
A few years back, I was involved in some development work that involved some GPS work. My memory is a bit fuzzy, but here are the basic principles.
Hot Start - The GPS receiver remembers its last calculated position and which satellites were in view, the almanac used, and the UTC Time. It then performs a reset and attempts to acquire satellites and calculate a new position based upon the previous information. This is the quickest re-acquisition of a GPS lock.
Warm Start - The GPS receiver remembers its last calculated position, almanac used, and knows the UTC Time, but not which satellites were in view. It then performs a reset and attempts to obtain the satellite signals and calculate a new position. The receiver has a general idea of which satellites to look for because it knows its last position and the almanac helps identify which satellites are visible in the sky. This takes longer than a Hot Start but not as long as a Cold Start.
Cold Start - The GPS receiver dumps all information and resets. It then attempts to locate satellites and then calculate a GPS lock. This takes the longest because there is no known information. The GPS receiver has to attempt to lock a satellite signal from all of the satellites, basically like polling, which takes a lot longer than knowing which satellites to look for. This re-acquisition of a GPS lock takes the longest.
Bron:
http://forum.ppcgeeks.com...-hot-cold-warm-start.html
Volgensmij heeft mobileuncle dus helemaal geen nut
edit:
ik had eerst cold geselecteerd, tot hij een fix had. Toen warm aangevinkt en nu krijg ik gewoon een fix.
dat deed ik onder location engineer mode en dan gps.
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Voor 7% gewijzigd door
pimNH op 09-02-2013 21:46
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