Skall kolla detta men såg denna Iphone video - kanske har hänt något med Iphone 4S
http://www.youtube.com/watch?v=Sf08o_j68XA
Fråga Var ser man i Iphone vilka satelliter den låser på ?!?!?!
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http://thenextweb.com/apple/2011/10/19/apple-sneaks-in-glonass-location-support-on-iphone-4s/
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Intressant artikel som bland annat tar upp Iphones GPS möjligheter
http://www.gpsworld.com/Defense/where-am-i-12499
Consider the following iPhone attributes:
- Receives 30+ GPS satellites.
- Receives 24+ GLONASS satellites.
- Receives WASS and EGNOS GEO satellite transmissions where available. Note that a GEO (geosynchronous Earth orbit) PNT satellite may be the geometric equivalent of more than three MEO (medium Earth orbit) satellites. As I have said many times, where PNT is concerned geometry matters.
- Receives Wi-Fi signals and un-encoded GPS signals processed by Skyhook wireless software, which providing a TTFF (time to first fix) of only four seconds.
- Receives 3G and 4G signals from cellular towers and provides a position when all other signals are obscured or otherwise unavailable. Note: While the Apple iPhone GPS chip is sensitive enough to work indoors, even when that fails due to electrical interference or dense shielding, the Wi-Fi signals and cellular signals usually penetrate. Warfighters tell me even in Afghanistan it is rare not to have an accurate position and time displayed on an Apple iPhone, iTouch or iPad.
- The iPhone user has access to 30+ PNT programs with highly accurate color terrain maps and satellite views that the GFE GPS does not provide.
- The Apple iPhone fully incorporates the multi-sourced PNT derived position with other applications on the iPhone and makes the most of situational awareness, which is critical to a warfighter and first responder.
- The Apple iPhone fully incorporates the PNT position with the communications capabilities of the iPhone to include cellular, Wi-Fi and SMS or texting for the younger generation.
- The iPhone allows users to take photos of their surroundings and encode the photos with PNT information, alerting others to their situation. It provides situational awareness for the users and those communicating with the users.
- The embedded and integrated communication capabilities of the iPhone allow the user to talk with mission planners, taskers and superiors while simultaneously reporting findings or accepting mission changes, all on the same device.
- If the iPhone is lost, its position can be determined with another iPhone or Apple computer. If it has fallen into enemy hands, it can be tracked and found, or if that is not feasible all the information on the Apple device can be deleted and the device rendered inert.
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Annan cool grej är att det nu går att ha GPS navigering inomhus på vissa ställen
http://allthingsd.com/20111129/google-maps-the-indoors-so-navigating-ikea-is-no-longer-a-nightmare/
http://googleblog.blogspot.com/2011/11/new-frontier-for-google-maps-mapping.html
