Home / Standards / GB/T 31158-2014 GB/T 31158-2014 Active Ionospheric total electron content (TEC) disturbance classification 电离层电子总含量(TEC)扰动分级 Standard Type GBT ICS 07.060 CCS A47 Status 现行 Issue Date 2014-09-03 Implementation 2015-01-01 Responsible Dept 中国气象局 Drafting Unit N/A