Home / Standards / GB/T 44878-2024 GB/T 44878-2024 Active Frozen soil observation—Frequency domain reflection method 冻土观测 频域反射法 Standard Type GBT ICS 07.060 CCS A47 Status 现行 Issue Date 2024-11-28 Implementation 2025-03-01 Responsible Dept 中国气象局 Drafting Unit N/A