Re: [Fed-Talk] IPAD
Re: [Fed-Talk] IPAD
- Subject: Re: [Fed-Talk] IPAD
- From: Joel Esler <email@hidden>
- Date: Sat, 30 Jan 2010 13:51:19 -0500
Okay. Then I stand corrected.
--
Joel Esler
On Jan 30, 2010, at 1:46 PM, Dave Schroeder <email@hidden> wrote:
No, Assisted GPS (A-GPS) *is* satellite GPS. It just also uses
triangulation with cell towers and wireless access points in
addition. It can acquire a GPS fix without any cellular network or
Wi-Fi connectivity, but because it is not optimized for that in the
same way that a dedicated handheld GPS receiver (and its antenna)
is, it could take several minutes (instead of seconds) to acquire an
accurate fix.
Once it acquires and maintains a fix -- in either assisted or
standalone mode -- it's just as accurate as any dedicated consumer
GPS receiver. This is the same case for the iPhone 3G/3GS. The
iPhone "2G" does have location services, but only via cell network
and Wi-Fi triangulation, and the iPod touch only via Wi-Fi. (Wi-Fi
triangulation services are provided by Skyhook Wireless.)
- Dave
On Jan 30, 2010, at 11:16 AM, Joel Esler wrote:
Okay, so it doesn't have "satellite" gps. It has agps, which is
triangulation using cell towers, and triangulation using wireless
access points.
--
Joel Esler
On Jan 30, 2010, at 10:00 AM, "C. A. Norton" <email@hidden>
wrote:
Location
• Wi-Fi
• Digital compass
• Assisted GPS (Wi-Fi + 3G model)
• Cellular (Wi-Fi + 3G model)
On Jan 28, 2010, at 11:15 AM, Todd Heberlein wrote:
On Jan 28, 2010, at 8:07 AM, Joel Esler wrote:
I don't know if the ipad has gps. Is it on the specs website?
http://www.apple.com/ipad/specs/
It looks like it has 4 location best technologies, but two of
them are only in the 3G models
Wi-Fi
Digital compass
Assisted GPS (Wi-Fi + 3G model)
Cellular (Wi-Fi + 3G model)
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