Title:
GPS_Signal.note.20170804
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Description: Global Positioning System (GPS) satellites broadcast microwave
signals to enable GPS receivers on or near the Earth s surface to
determine location and synchronized time. The GPS system itself is
operated by the U.S. Department of Defense (DoD) for use by both the
military and the general public.
GPS signals include ranging signals, used to measure the distance to
the satellite, and navigation messages. The navigation messages
include ephemeris data, used to calculate the position of each satellite
in orbit, and information about the time and status of the entire satellite
constellation, called the almanac
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