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2. Precision Lightweight GPS Receiver - Wikipedia

   en.wikipedia.org/wiki/Precision_Lightweight_GPS...

   The AN/PSN-11 Precision Lightweight GPS Receiver (PLGR, colloquially "plugger") is a ruggedized, hand-held, single-frequency GPS receiver fielded by the United States Armed Forces. It incorporates the Precise Positioning Service — Security Module (PPS-SM) to access the encrypted P(Y)-code GPS signal .

3. Selective availability anti-spoofing module - Wikipedia

   en.wikipedia.org/wiki/Selective_availability...

   A Selective Availability Anti-spoofing Module (SAASM) is used by military Global Positioning System receivers to allow decryption of precision GPS observations, while the accuracy of civilian GPS receivers may be reduced by the United States military through Selective Availability (SA) and anti-spoofing (AS). [1]

4. StarFire (navigation system) - Wikipedia

   en.wikipedia.org/wiki/StarFire_(navigation_system)

   StarFire is a wide-area differential GPS developed by John Deere's NavCom and precision farming groups. StarFire broadcasts additional "correction information" over satellite L-band frequencies around the world, allowing a StarFire-equipped receiver to produce position measurements accurate to well under one meter, with typical accuracy over a 24-hour period being under 4.5 cm. StarFire is ...

5. 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 22 January 2025, 83 Global Positioning System navigation satellites have been built: 31 are launched and operational, 3 are in reserve or testing, 43 are retired, 2 were lost during launch, and 1 prototype was never launched. 3 Block III satellites have completed ...

6. Global Positioning System - Wikipedia

   en.wikipedia.org/wiki/Global_Positioning_System

   As of early 2015, high-quality Standard Positioning Service (SPS) GPS receivers provided horizontal accuracy of better than 3.5 meters (11 ft), [10] although many factors such as receiver and antenna quality and atmospheric issues can affect this accuracy. GPS is owned and operated by the United States government as a national resource.

7. Strava is an accurate GPS tracking app with plenty of social ...

   www.aol.com/strava-accurate-gps-tracking-app...

   I’ve always enjoyed exploring new ways to track my activity. There’s nothing like strapping on a new wearable or loading up a new app before hitting the road. I’m all for this relatively new ...