On July 25, 2015, the 18th and 19th satellites were successfully launched from the Xichang Satellite Launch Center, marking the first time for China to launch two satellites at once on top of a Long March 3B/Expedition-1 carrier rocket. The Expedition-1 is an independent upper stage capable of delivering one or more spacecraft into different orbits. COUNT 4
QSN1 When were the 18th and 19th satellites for the BeiDou system launched? ANS1 July 25, 2015 QSN2 Where were the 18th and 19th satellites for the BeiDou system launched from? ANS2 the Xichang Satellite Launch Center QSN3 What were the 18th and 19th satellites for the BeiDou system launched with? ANS3 Long March 3B/Expedition-1 carrier rocket QSN4 What is the Expedition-1? ANS4 an independent upper stage capable of delivering one or more spacecraft into different orbits