09/17/2013
https://www.congress.gov...
"why the reduction?"
"Assured access to space is not cheap and the cost is trending up."
"During that hearing you explained that that if both the GPS IIF and the GPS IIIA programs are executed on schedule, there is only a 80 to 90 percent probability that the constellation will stay above ..."
"We remain concerned about the Air Force's ability to deliver GPS IIIA satellites as promised, given that the Air Force aims to deliver them 3 years faster than the IIF satellites."