?????????
????NASA?????????????
?????????????̦?????????????
???????????????????????????????????????
????????????????????????16?30???
??????
??????2017?ٳ??Stratollite?????????
??????NASA???100??s?Stratollite???ݔ???
?????????2018???4?????Stratollite????????5?y????٧
?????10??????????????a?o?????
???????500???????????????????5??
???????????9???????????
NASA?٧??
NASA????????????NASA??????100???????????????
????????????????????????????????
??NASA??????????????????????