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2. Real-time kinematic positioning - Wikipedia

   en.wikipedia.org/wiki/Real-time_kinematic...

   A surveyor uses a GNSS receiver with an RTK solution to accurately locate a parking stripe for a topographic survey. Real-time kinematic positioning (RTK) is the application of surveying to correct for common errors in current satellite navigation (GNSS) systems. [1]

3. RTCM SC-104 - Wikipedia

   en.wikipedia.org/wiki/RTCM_SC-104

   In 1992 the group met to consider input from users working with phase-comparison GPS (RTK) that produces accuracy on the order of 1 centimetre (0.39 in). New message types were suggested and standardized as version 2.1 in 1994, including types 18 and 19 for raw pseudo-range measurements, or 20 and 21 as corrections.

4. Trimble Inc. - Wikipedia

   en.wikipedia.org/wiki/Trimble_Inc.

   Trimble Inc. is an American software, hardware, and services technology company. Trimble also does hardware development of global navigation satellite system (GNSS) receivers, scanners, total stations, laser rangefinders, unmanned aerial vehicles (UAVs), inertial navigation systems and software processing tools.

5. Differential GPS - Wikipedia

   en.wikipedia.org/wiki/Differential_GPS

   When GPS was first being put into service, the US military was concerned about the possibility of enemy forces using the globally available GPS signals to guide their own weapon systems. Originally, the government thought the "coarse acquisition" (C/A) signal would give only about 100- metre (330 ft ) accuracy, but with improved receiver ...

6. GPS navigation maker Trimble posts results beat, raises ... - AOL

   www.aol.com/news/gps-navigation-maker-trimble...

   -Trimble on Tuesday beat second-quarter results estimates and raised its annual forecast, on strong demand for its subscription plans and software solutions, sending its shares up 2.5%.

7. 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 19 December 2024, 83 Global Positioning System navigation satellites have been built: 30 are launched and operational, 1 is launched and undergoing the commissioning process, 3 are in reserve or testing, 43 are retired, 2 were lost during launch, and 1 prototype was never ...