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2. Satellite navigation device - Wikipedia

   en.wikipedia.org/wiki/Satellite_navigation_device

   Vehicle navigation on a personal navigation assistant Garmin eTrex10 edition handheld. A satellite navigation device or satnav device, also known as a satellite navigation receiver or satnav receiver or simply a GPS device, is a user equipment that uses satellites of the Global Positioning System (GPS) or similar global navigation satellite systems (GNSS).

3. GPS tracking unit - Wikipedia

   en.wikipedia.org/wiki/GPS_tracking_unit

   A GPS tracking unit, geotracking unit, satellite tracking unit, or simply tracker is a navigation device normally on a vehicle, asset, person or animal that uses satellite navigation to determine its movement and determine its WGS84 UTM geographic position (geotracking) to determine its location. [1]

4. Error analysis for the Global Positioning System - Wikipedia

   en.wikipedia.org/wiki/Error_analysis_for_the...

   These effects are added together to give (rounded to 10 ns): 45850 – 7210 = 38640 ns. Hence the satellites' clocks gain approximately 38,640 nanoseconds a day or 38.6 μs per day due to relativistic effects in total. In order to compensate for this gain, a GPS clock's frequency needs to be slowed by the fraction:

5. Garmin - Wikipedia

   en.wikipedia.org/wiki/Garmin

   Garmin entered this market in 1991 with the GPS-100AVD panel-mounted receiver. Its first portable unit, the GPS-95, was introduced in 1993. In 1994, the GPS-155 panel-mounted unit was the first GPS receiver on the market to receive full FAA certification for instrument approaches.

6. Satellite navigation - Wikipedia

   en.wikipedia.org/wiki/Satellite_navigation

   The United States' Global Positioning System (GPS) consists of up to 32 medium Earth orbit satellites in six different orbital planes. The exact number of satellites varies as older satellites are retired and replaced. Operational since 1978 and globally available since 1994, GPS is the world's most utilized satellite navigation system.

7. Automotive navigation system - Wikipedia

   en.wikipedia.org/wiki/Automotive_navigation_system

   Originally developed to locate hydrants for fire departments, this system utilized both satellite signals & dead reckoning improving overall system accuracy due to civilian GPS limitations. This system also boast a color raster scan monitor, rather than the monochromatic vector mapping displays used by predecessors.