Home / Standards / GB/T 34309-2017 GB/T 34309-2017 Active Technical manual of the landing typhoon surface boundary layer enhanced observation 登陆台风近地边界层增强观测技术指南 Standard Type GBT ICS 07.060 CCS A47 Status 现行 Issue Date 2017-09-07 Implementation 2018-04-01 Responsible Dept 中国气象局 Drafting Unit N/A