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2. Web mapping - Wikipedia

   en.wikipedia.org/wiki/Web_mapping

   A web map app in a smart phone. Web mapping or an online mapping is the process of using, creating, and distributing maps on the World Wide Web (the Web), usually through the use of Web geographic information systems (Web GIS).

3. Submarine navigation - Wikipedia

   en.wikipedia.org/wiki/Submarine_navigation

   Satellite navigation: Global positioning system (GPS)—by entering waypoints internally, able to navigate at a more precise level. NAVSAT; Terrestrial radio-based navigation systems; largely superseded by satellite systems LORAN—Low frequency radio hyperbolic navigation system, no longer in use; CHAYKA, the Russian counterpart of LORAN

4. Google Earth - Wikipedia

   en.wikipedia.org/wiki/Google_Earth

   Google Earth is a web and computer program that renders a 3D representation of Earth based primarily on satellite imagery.The program maps the Earth by superimposing satellite images, aerial photography, and GIS data onto a 3D globe, allowing users to see cities and landscapes from various angles.

5. Satellite navigation - Wikipedia

   en.wikipedia.org/wiki/Satellite_navigation

   The formerly Soviet, and now Russian, Global'naya Navigatsionnaya Sputnikovaya Sistema, (GLObal NAvigation Satellite System or GLONASS), is a space-based satellite navigation system that provides a civilian radionavigation-satellite service and is also used by the Russian Aerospace Defence Forces. GLONASS has full global coverage since 1995 and ...

6. Global Positioning System - Wikipedia

   en.wikipedia.org/wiki/Global_Positioning_System

   In some cases, GPS receivers are designed to use up to 400 MHz of spectrum in either direction of the L1 frequency of 1575.42 MHz, because mobile satellite services in those regions are broadcasting from space to ground, and at power levels commensurate with mobile satellite services. [198]

7. Terra (satellite) - Wikipedia

   en.wikipedia.org/wiki/Terra_(satellite)

   Terra (EOS AM-1) is a multi-national scientific research satellite operated by NASA in a Sun-synchronous orbit around the Earth.It takes simultaneous measurements of Earth's atmosphere, land, and water to understand how Earth is changing and to identify the consequences for life on Earth. [1]