???NASA???????¦Ä????????????????????
??13????????????????§Þ??
????????????3000???????300?????NASA?????§Ñ??????§³??§Ó?õô¦Ä?????????
?????§µ??????????§³?12.4?????¡ê??§³??§á???§Ó????????????2000?3000??¦²????????§³?§³??
???§Á??Œþ?RPWS???????????§Ö??????RPWS??????????§³??????????
??????? ?