Error analysis for the Global Positioning System: Difference between revisions

Revision as of 03:16, 6 June 2010

Revision as of 18:03, 6 June 2010

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Due to the potential for both natural and man-made noise, numerous techniques continue to be developed to deal with the interference. The first is to not rely on GPS as a sole source. According to John Ruley, "[[Instrument flight rules|IFR]] pilots should have a fallback plan in case of a GPS malfunction".<ref>Ruley, John. AVweb. [http://www.avweb.com/news/avionics/182754-1.html GPS jamming]. February 12, 2003.</ref> [[RAIM|Receiver Autonomous Integrity Monitoring]] (RAIM) is a feature included in some receivers, designed to provide a warning to the user if jamming or another problem is detected. The U.S. military has also deployed since 2004 their [[SAASM|Selective Availability / Anti-Spoofing Module]] (SAASM) in the [[Defense Advanced GPS Receiver]] (DAGR).<ref>[https://rdit.army.mil/GPS/CustomContent/gps/ue/dagr.html US Army DAGR page]</ref> In demonstration videos the DAGR was shown to detect jamming and maintain its lock on the encrypted GPS signals during interference which caused civilian receivers to lose lock.

== See also ==

* [[GPS augmentation]]

== Notes ==