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2. Comparison of free off-line satellite navigation software

   en.wikipedia.org/wiki/Comparison_of_free_off...

   Comparison of free off-line satellite navigation software. This article contains a list with gratis (but not necessarily open source) satellite navigation (or "GPS") software for a range of devices (PC, laptop, tablet PC, mobile phone, handheld PC (Pocket PC, Palm)). Some of the free software mentioned here does not have detailed maps (or maps ...

3. 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 ...

4. Defense Advanced GPS Receiver - Wikipedia

   en.wikipedia.org/wiki/Defense_Advanced_GPS_Receiver

   Coordinates are for Rockwell Collins headquarters in . The AN/PSN-13 Defense Advanced GPS Receiver ( DAGR; colloquially, " dagger ") is a handheld GPS receiver used by the United States Department of Defense and select foreign military services. It is a military-grade, dual-frequency receiver, and has the security hardware necessary to decode ...

5. The 9 Best Hiking GPS Devices - AOL

   www.aol.com/lifestyle/9-best-hiking-gps-devices...

   See where you are and where you want to go with these expert-approved handheld GPS devices, GPS watches, and apps, from Garmin, Suunto, Gaia, and Caltopo. The 9 Best Hiking GPS Devices Skip to ...

6. GNSS applications - Wikipedia

   en.wikipedia.org/wiki/GNSS_applications

   GNSS applications. Global Navigation Satellite System (GNSS) receivers, using the GPS, GLONASS, Galileo or BeiDou system, are used in many applications. The first systems were developed in the 20th century, mainly to help military personnel find their way, but location awareness soon found many civilian applications.

7. Geodetic datum - Wikipedia

   en.wikipedia.org/wiki/Geodetic_datum

   A geodetic datum or geodetic system (also: geodetic reference datum, geodetic reference system, or geodetic reference frame) is a global datum reference or reference frame for precisely representing the position of locations on Earth or other planetary bodies by means of geodetic coordinates. [1] Datums [note 1] are crucial to any technology or ...