System to improve the time-to-first-fix of a GNSS receiver
Assisted GPS
Assisted GNSS (A-GNSS) is a GNSS augmentation system that often significantly improves the startup performance—i.e., time-to-first-fix (TTFF)—of a global navigation satellite system (GNSS). A-GNSS works by providing the necessary data to the device via a radio network instead of the slow satellite link, essentially "warming up" the receiver for a fix. When applied to GPS, it is known as assisted GPS or augmented GPS (abbreviated generally as A-GPS and less commonly as aGPS). Other local names include A-GANSS for Galileo and A-Beidou for BeiDou.
A-GPS is extensively used with GPS-capable cellular phones, as its development was accelerated by the U.S. FCC's 911 requirement to make cell phone location data available to emergency call dispatchers.[1]
^"Assisted GPS: A Low-Infrastructure Approach". GPS World. March 1, 2002. Retrieved 11 June 2008.
AssistedGNSS (A-GNSS) is a GNSS augmentation system that often significantly improves the startup performance—i.e., time-to-first-fix (TTFF)—of a global...
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receiver Assisted GPS (A-GPS) - System used primarily in GPS-equipped cellular devices to improve start-up performance GNSS augmentation GNSS enhancement...
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