According to an US Government Accountability Office (GAO) report, the replacement of in-orbits satellites is month behind schedule and millions of dollars over budget, which could mean that satellite navigation might start not working once the old satellites begin to fail. The report mentions that it’s not known if the Air Force will be able to acquire and launch new satellites in time to maintain the current level of GPS service.
Most of the satellites currently in use have a life expectancy of 8 years (some can last up to 15 years) and satellite navigation and GPS devices use three or more satellites to triangulate the motorist’s location.
[Source: Auto Express]
