The eighth GPS IIF satellite is now operational.

The satellite, designated GPS Space Vehicle-69, was launched October 29 and completed its checkout December 12. This is the fourth GPS IIF to enter service this year.

"With two-thirds of the 12 Boeing GPS IIFs now on orbit, the constellation is setting new records for accuracy and the Boeing GPS IIF's are consistently among the best performing," said Dan Hart, vice president of government space systems for Boeing Network & Space Systems.