由于卫星已无法接收地面指令，美方尚无法确定它的坠落区域。
Since the satellite can not receive any messages from Earth, where it is going to crash has not been determined.
现有的飞行机器人是由一个地面引航员操作的，但是更小的一款将依照程序的指令自己飞行。
Existing airborne robots are flown by a ground-based pilot, but the smaller versions would fly independently, relying on preprogrammed instructions.
在纽约的拉瓜地亚机场，一名外地的飞行员同事没听到要他到大门转弯的指令，虽是一个小小的失误，但还是惹恼了地面管理人员。
An out-of-town fellow pilot missed a turn to his gate at LaGuardia Airport in New York, a harmless mistake that nonetheless ruffles the feathers of the ground controllers.
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