upper atmosphere research satellite

基本解释

The 20-year-old Upper Atmosphere Research Satellite will be the biggest NASA spacecraft to fall uncontrolled from the sky in 32 years.
"服役"20年的高层大气研究卫星将是NASA近32年来最大的失控航天器。
Much of the speculation focused on unconfirmed reports and even video of debris from the Upper Atmosphere Research Satellite over Alberta, Canada.
猜测多聚焦于未证实的报导，甚至它的碎片视频，视频是被加拿大亚伯特达省上空的上层大气研究卫星拍摄到的。
No one can say in advance exactly where the remains of the Upper Atmosphere Research Satellite (UARS) will hit, but history and intensive calculations show that the risk to humans is extremely low.
但没有人可以确认这颗高层大气研究卫星（UARS）到底会坠毁在哪里。