Military Works To Improve GPS Accuracy And Coverage

http://www.aero-news.net/index.cfm?contentBlockId=1582fc36-88fc-4732-9d28-32b204f9d31f

Two-Year Program Will Move Satellites To Support Troops
Officials from the US Strategic Command (STRATCOM) and Air Force
Space Command (AFSPC) recently initiated an effort that will improve
global coverage for users of GPS. The need to support US and allied
military operations in Afghanistan and Iraq, where terrain in
geographically challenging areas can degrade complete coverage of GPS
signals, drove a look for ways to improve signal coverage.