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Posts Tagged "GPS augmentation"

The GPS Aided Geo Augmented Navigation or GPS and Geo Augmented Navigation system (GAGAN) is a space-based augmentation system (SBAS) funded by the Indian government. Interestingly, Gagan is not just an acronym: it is also a Sanskrit word for the sky. The GAGAN space transponder is due to be launched on 19th May 2011 on an Ariane-5 launcher from the European Space Agency (ESA) spaceport in Kourou, French Guiana. This will be the second attempt to get GAGAN into orbit. The first satelli...

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The recent certification of the European Geostationary Navigation Overlay Service (EGNOS) for safety of life applications now means that its performance is of a high enough standard that it can be used for aviation. Pilots can reliably use it as a navigation tool, enhancing the performance of stand-alone GPS. This means navigations systems for aircraft can now be produced knowing that the systems they will use are certified, robust and reliable. Designers and manufacturers of these systems will...

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In a recent post I explained the concept behind QZSS (What is QZSS) – Since the publication of that post and to further help in the development of the Quazi-Zenith Satellite System (QZSS) programme, the Japanese Aerospace Exploration Agency (JAXA) has selected Spirent’s GSS8000 Multi-GNSS Constellation Simulator to verify QZSS receivers. The highly elliptical orbits of QZSS allow satellites to dwell at high elevations, improving coverage in urban canyons and providing additional...

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The Quasi-Zenith Satellite System (QZSS) is a GPS augmentation system that aims to greatly improve GNSS accuracy over Japan and the rest of East Asia. The first satellite in the system, dubbed Michibiki, was successfully launched from the Tanegashima space centre on 11th September and reached its quasi-zenith orbit on 27th September 2010. QZSS aims to enhance GPS services both by improving the availability of GPS signals and by performance enhancement to increase the accuracy and relia...

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The Local Area Augmentation System (LAAS) is a ground-based augmentation system (GBAS) specified by the US Federal Aviation Authority for use at airports to augment the accuracy of GNSS-based navigation. The LAAS focuses its service on the airport area (around 30-50km radius) for precision approach, departure procedures and terminal area operations. It broadcasts its correction message over a VHF radio datalink from a ground-based transmitter. The FAA plans to replace legacy navi...

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We are generally being encouraged through government sponsored advertising to spend less time in our cars or not to rev our car engines too much. By doing so we can help to save fuel, the world’s resources and, by implication, do our bit towards reducing climate change. The European Union has a long-standing target for car manufacturers to reduce average CO2 emissions for their vehicles to 120g/km by 2012. A longer term target is 80g/km by 2020. The view of the industry has been that this ...

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By Spirent On August 19, 2010
Positioning
EGNOS, WAAS, MSAS, GPS augmentation

Hosted by the European Space Agency, the European Commission and Eurocontrol, EGNOS is the European Geostationary Navigation Overlay Service, and is the first pan-European satellite navigation system. EGNOS comprises just three satellites, and acts as an enhancement to the US-based GPS system for safety critical applications in aviation and marine environments. The EGNOS Open Service has been up and running since 1st October 2009. This provides freely available positioning data through...

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Many world governments have a long-standing target for car manufacturers to reduce average CO2 emissions for their vehicles. The European Union target is 120g/km by 2012 and longer term to 80g/km by 2020. The view of the industry has been that this is very challenging and unlikely to be met via conventional approaches alone. Indeed, the 2012 target already represents a slip from an original 2005 target date. As most manufacturers will not be able to meet the 2012 target, further slippages (possi...

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