Global Positioning System (GPS)

Global Positioning System

The Global Positioning System (GPS), also known as Navstar. It is a global navigation satellite system (GNSS) that provides location and time information in all weather conditions, anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites.

The GPS system operates independently of any telephonic or internet reception, though these technologies can enhance the usefulness of the GPS positioning information. The GPS system provides critical positioning capabilities to military, civil, and commercial users around the world. The United States government created the system, maintains it, and makes it freely accessible to anyone with a GPS receiver.

Types of Global navigation satellite systems

Other satellite navigation systems in use or various states of development include:

  • GLONASS – Russia’s global navigation system. Fully operational worldwide.
  • Galileo – a global system being developed by the European Union and other partner countries, planned to be     operational by 2016 (and fully deployed by 2020)
  • Beidou – People’s Republic of China’s regional system, currently limited to Asia and the West Pacific,[149] global coverage planned to be operational by 2020[150][151]
  • IRNSS (NAVIC) – India’s regional navigation system, covering India and Northern Indian Ocean
  • QZSS – Japanese regional system covering Asia and Oceania

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