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2. List of GPS satellites - Wikipedia

   en.wikipedia.org/wiki/List_of_GPS_satellites

   Samples of three GPS satellites' orbits over a five-year period (2013 to 2018) USA-242 · USA-239 · USA-151 · Earth As of 15 August 2023, 83 Global Positioning System navigation satellites have been built: 31 are launched and operational, 4 are unhealthy or in reserve, 41 are retired, 2 were lost during launch, and 1 prototype was never launched. 4 Block III satellites have completed ...

3. List of cameras which provide geotagging - Wikipedia

   en.wikipedia.org/wiki/List_of_cameras_which...

   Manufacturer Camera model Camera type Year Method of geotagging Altek Digital Camera Compact 2008: Built-in GPS: Canon EOS-1D X Mark II: DSLR 2016: Built-in GPS: Canon

4. Global Positioning System - Wikipedia

   en.wikipedia.org/wiki/Global_Positioning_System

   The Global Positioning System ( GPS ), originally Navstar GPS, [2] is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. [3] It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near ...

5. Error analysis for the Global Positioning System - Wikipedia

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

   GPS observation processing must also compensate for the Sagnac effect. The GPS time scale is defined in an inertial system but observations are processed in an Earth-centered, Earth-fixed (co-rotating) system. A coordinate transformation is thus applied to convert from the inertial system to the ECEF system.

6. Tractive - Wikipedia

   en.wikipedia.org/wiki/Tractive

   Website. www .tractive .com. Tractive develops and sells GPS & Health trackers for dogs and cats that enable pet owners to view their pet's real-time location, receive Health Alerts, and monitor activity and sleep patterns via a smartphone app. Tractive tracks around 1,000,000 pets in over 175 countries worldwide using GPS and GSM technology.

7. GPS Block III - Wikipedia

   en.wikipedia.org/wiki/GPS_Block_III

   GPS Block III (previously Block IIIA) consists of the first ten GPS III satellites, which will be used to keep the Navstar Global Positioning System operational. Lockheed Martin designed, developed and manufactured the GPS III Non-Flight Satellite Testbed (GNST) and all ten Block III satellites. [7] The first satellite in the series was ...