Assisted GPS (A-GPS
) is a system that often significantly improves startup performance—i.e., time-to-first-fix (TTFF), of a GPS
satellite-based positioning system. A-GPS
is extensively used with GPS-capable Mobile Devices
, as its development was accelerated by the U.S. FCC's 911 requirement to make cell phone location data available to emergency call dispatchers.
There might be more information for this subject on one of the following: