GPS Backups/ Alternatives Too Hard & Costly? - GPS OCX delayed again, now at $6.1B - RNTF
Global Positioning System: Updated Schedule Assessment Could Help Decision Makers Address Likely Delays Related to New Ground Control System | U.S. GAO
Kendall Says Recompeting OCX is a Possibility - SpaceNews
Update on GPS III -- lots of moving parts | Acquisition Talk
GPS OCX passes review
OCX May Take First Big Step Out Of Purdah - Breaking Defense