GPS Threatened With Widespread Interference
![GPS Constellation [photo credit: NIST]](http://gisforum.org/wp-content/uploads/2011/04/GPS_Constellation_2.gif)
“GPS Threatened With Widespread Interference”, from an email received from State Dept of Emergency Management GIS Manager, Richard Butgereit
Providing a medium for the exchange and dissemination of ideas regarding technical GIS issues
“GPS Threatened With Widespread Interference”, from an email received from State Dept of Emergency Management GIS Manager, Richard Butgereit