Hi Joe:
I think it's the L1C signal, see:
http://www.prc68.com/I/DAGR.shtml#GPSs
I remember reading that they want your cell phone to guide you to a
shop's front door in a multistory building. There will be ceiling
mounted pseudo satellites using the same L1C signal to make that work.
Have Fun,
Brooke Clarke
http://www.PRC68.com
Joseph Gray wrote:
No details on how the extra Japanese satellite is making it possible
to get this accuracy.
http://www.crunchgear.com/2011/01/04/new-gps-system-boosts-accuracy-to-3cm/
Joe Gray
W5JG
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