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美国东部时间3月25日下午14点36分,一枚美国联合发射同盟(ULA)的德尔塔IV型火箭从弗罗里达州卡纳维拉尔角空军基地发射升空,将美国空军的最新一颗全球定位系统卫星GPS IIF-9送入了预定轨道。GPS IIF-9卫星是波音公司研发的12颗卫星中的第9颗,预计2016年年初,12颗卫星将全部发射升空。随着GPS IIF-9的发射,Block IIF批次的GPS卫星会继续增多,计划今年6月,9月和明年1月发射
At 14:36 a.m. Eastern Time on March 25, a U.S. Joint Launching Alliance (ULA) Delta IV rocket was launched from the Cape Canaveral Air Force Base in Florida to air the latest version of the U.S. Air Force A Global Positioning System satellite GPS IIF-9 was sent to a scheduled orbit. The GPS IIF-9 is the ninth of 12 satellites developed by Boeing. It is estimated that 12 satellites will be fully launched by the beginning of 2016. With the launch of the GPS IIF-9, Block IIF batches of GPS satellites will continue to increase and are scheduled to launch in June, September and January of this year