[PAR] [TLE] Global Positioning System [SEP] The Global Positioning System (GPS), originally Navstar GPS, is a space-based radionavigation system owned by the United States government and operated by the United States Air Force.  It is a global navigation satellite system that provides geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. [PAR] [TLE] Quasi-Zenith Satellite System [SEP] The Quasi-Zenith Satellite System (QZSS) is a three-satellite regional time transfer system in development and the satellite-based augmentation system for the Global Positioning System that would be receivable within Japan.  The first satellite "Michibiki" was launched on 11 September 2010.  Full operational status was expected by 2013.  In March 2013, Japan's Cabinet Office announced the expansion of the Quasi-Zenith Satellite System from three satellites to four.  The $526 million contract with Mitsubishi Electric for the construction of three satellites is slated for launch before the end of 2017.  The basic four-satellite system is planned to be operational in 2018.
[PAR] [TLE] Global Positioning System [ SEP ] The Global Positioning System ( GPS ) , originally Navstar GPS , is a space - based radionavigation system owned by the United States government and operated by the United States Air Force . It is a global navigation satellite system that provides geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites . [PAR] [TLE] Quasi - Zenith Satellite System [ SEP ] The Quasi - Zenith Satellite System ( QZSS ) is a three - satellite regional time transfer system in development and the satellite - based augmentation system for the Global Positioning System that would be receivable within Japan . The first satellite " Michibiki " was launched on 11 September 2010 . Full operational status was expected by 2013 . In March 2013 , Japan 's Cabinet Office announced the expansion of the Quasi - Zenith Satellite System from three satellites to four . The $ 526 million contract with Mitsubishi Electric for the construction of three satellites is slated for launch before the end of 2017 . The basic four - satellite system is planned to be operational in 2018 .
Who is the operator of a space-based radionavigation system which is the base of the QZSS?
Who is the operator of a space - based radionavigation system which is the base of the QZSS ?
United States Air Force
United States Air Force