March 5, 2010 07:48
March 5, 2010 09:09
Only iPhone 3G, iPhone 3GS and iPad 3G have an [assisted] GPS receiver. In addition iPhone 3GS and iPad 3G have a compass.
Yes the [assisted] GPS can acquire an accurate position without needing a cell or WiFi connection. The acquisition can take longer without assistance.
http://arstechnica.com/apple/news/2008/1...ection.ars
Yes the [assisted] GPS can acquire an accurate position without needing a cell or WiFi connection. The acquisition can take longer without assistance.
http://arstechnica.com/apple/news/2008/1...ection.ars
March 10, 2010 18:41
I've just heard from a friend who is 5 days into a passage in the Caribbean. His iPhone can no longer acquire a GPS signal. Maybe the almanac data gets too old after several days, and the GPS cannot do a cold-start.