January 10, 2012 GLONASS Modernization: Maybe Six Planes, Probably More Satellites By GPS World Staff
December 1, 2011 Consumer GPS/GLONASS: Accuracy and Availability Trials of a One-Chip Receiver in Obstructed Environments By GPS World Staff
May 1, 2011 The System: Second Report by LightSquared/GPS Technical Working Group Maps Terrain, Does Not Yet Explore By Alan Cameron
