Space Weather and GPS
A few links to PDF articles of Space Weather effects on Global Positioning Systems:
A Beginners Guide to Space Weather and GPS
Observed solar radio burst effects on GPS/Wide
Area Augmentation System carrier-to-noise ratio
6 December 2006 solar radio burst associated with the X-6 flare at 1845 UT
4 April 2007 NOAA SWEF Press Release
Movie depicting loss of GPS satellite
observations due to solar radio burst on 6 Dec. 2006. Data taken from
random sampling of IGS network receivers. The color of the dots
represents the number of dual-frequency code observations made
to each satellite. (5 MB)
See here for more plots and information
about the effects this event had on various GPS receivers.
See also here for more plots and information
about the effects the X-3 and X-1 flares on the same day had on various GPS receivers.