[WEBINAR] The New Normal: Dealing with the Reality of an Unsecure World

Global Navigation Satellite System (GNSS)

Definition - What does Global Navigation Satellite System (GNSS) mean?

A global navigation satellite system (GNSS) is a type of satellite navigation that provides global coverage. A GNSS is defined by a constellation of orbiting satellites working together with a network of ground control stations and receivers that calculate ground positions through an adapted version of trilateration.

To date, there are only two operational GNSSs, the United States’ NAVSTAR Global Positioning System (GPS) and the Russian Federation’s Global Navigation Satellite System (GLONASS). However there are two other satellites undergoing development, the European Union’s Galileo and China’s Compass or BeiDou-2.

Techopedia explains Global Navigation Satellite System (GNSS)

A global navigation satellite system is a constellation of satellites that provide geo-spatial positioning to many devices autonomously, allowing electronic devices with the appropriate receivers to determine their precise location on the surface of the Earth.

The initial motivation for a satellite system was for military applications, but it has now progressed to more extensive civil applications, including the following:

  • Aviation
  • Disaster warning and emergency response
  • Land transportation
  • Maritime
  • Mapping and surveying
  • Monitoring of the environment
  • Precision agriculture
  • Natural resources management
  • Research, such as climate change and ionospheric studies
  • Wireless networking
  • Photographic geocoding
  • Mobile satellite communications
  • Precise time reference
  • Military precision-guided munitions

Generally the global coverage can be achieved through a satellite constellation of 20 to 30 medium Earth orbit (MEO) satellites. Each satellite would be placed between several orbital planes. Current systems vary, but altogether set the orbital inclinations to > 50° and their orbital periods to roughly 12 hours at an altitude of almost 12,000 miles (20,000 km).

Techopedia Deals

Connect with us

Techopedia on Linkedin
Techopedia on Linkedin
"Techopedia" on Twitter

Sign up for Techopedia's Free Newsletter!

Email Newsletter

Join thousands of others with our weekly newsletter

Free Whitepaper: The Path to Hybrid Cloud
Free Whitepaper: The Path to Hybrid Cloud:
The Path to Hybrid Cloud: Intelligent Bursting To Amazon Web Services & Microsoft Azure
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.