The answer is radiosonde. See the following link.

回答: 认真地问个物理问题4338327950282011-02-23 13:22:45

http://www.ua.nws.noaa.gov/factsheet.htm

所有跟帖: 

this is a professional answer -用户名被占用了- 给 用户名被占用了 发送悄悄话 用户名被占用了 的博客首页 (0 bytes) () 02/23/2011 postreply 17:45:57

I doublt if there is an amateur answer -shortstop- 给 shortstop 发送悄悄话 (222 bytes) () 02/23/2011 postreply 18:16:24

请您先登陆,再发跟帖!