China launches final pair of backup Beidou satellites China launched the last pair of backup satellites for its Beidou navigation system late Wednesday, with an eye on a future, upgraded system.
The two satellites, the 59th and 60th satellites of the BeiDou family, were launched at 9:14 a.m. (Beijing Time) by a Long March-3B carrier rocket and the Yuanzheng-1 (Expedition-1) upper stage ...