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William Atkins
Monday, 23 June 2008 19:31
As of 2007, the U.S. Global Positioning System (GPS) is the only fully operational one. However, Russia, the European Union, and China are pursuing the development of their own systems.
Now, for the first time, a direct link has been established between the loss of accuracy on a GPS receiver (even resulting in loss of signal) and intense electrical activity within the Aurora Borealis, or the Northern Lights.
The research was published in the American Geophysical Union's International Journal of Space Weather under the title “GPS scintillation in the high arctic associated with an auroral arc.”
The researchers involved in the study are: Andrew M. Smith, Cathryn N. Mitchell, Robert J. Watson, Robert W. Meggs, all of the Electronic and Electrical Engineering Department at the University of Bath (United Kingdom); Paul M. Kintner, School of Electrical and Computer Engineering at Cornell University (U.S.A.), Kirsti Kanristie, Space Research Unit at the Finnish Meteorological Institute (Finland), and Farideh Honary, Communications Systems at Lancaster University (U.K.).
The researchers observed at 0123 Universal Time (UT) on November 8, 2004, the rapid fading of GPS signals at three scintillation receivers (sat-nav systems), closely positioned together in northern Norway. Their observations occurred before, during, and after an intense electrical event of the Northern Lights.
Although the event only lasted about ten seconds, its intensity (and the similar intensities of other ones) can cause the GPS receivers to malfunction. CONTINUED
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