The Air Force is ready to launch a new GPS system from its base in Los Angeles. Boeing made the ninth GPS IIF satellite that was set to go up aboard a United Launch Alliance Delta IV launch vehicle.

According to experts, it is first of three GPS IIF space vehicles that are planned to be launched in 2015. It is going to join eight of what will eventually be 12 such satellites that are presently in orbit.

The new satellites include a third civil signal for commercial aviation and safety applications, enhanced navigational accuracy through advanced atomic clocks.

"Significant investments to modernize the GPS constellation are in work, to include higher power from space, military receivers that are more resistant to jamming, new encryption algorithms, key management agility, and innovative software processing to increase resistance to spoofing", said Brig. Gen. Bill Cooley, director of Space and Missile Systems Center's GPS Directorate.

Cooley said that their focus is on mission success and stand prepared to launch the ninth GPS IIF space vehicle. This will help to carry on modernization of the GPS constellation and also to continue the high level of accuracy that the GPS system need.

As per the experts, the GPS constellation is healthy, stable and robust with 30 satellites working around the clock. According to another Air Force, recently a GPS message indexing problem has been identified. The accuracy of the GPS signal has not been affected by the problem.

It appears that the problem is connected to the ground software that builds and uploads messages sent by the GPS constellation at the time of regular system operations. . The Air Force is examining all possible causes.