height above average terrain中文什么意思

地面平均高度

• height:    n. 1.高，高度；身高；海拔。 2 ...
• above:    adv. 1.在上面；在头上；【宗教 ...
• average:    n. 1.平均，平均数。 2.一般水 ...
• terrain:    n. 1.地面；地带；地区。 2.( ...

百科释义

Height above average terrain (HAAT) (or less popularly, EHAAT, Effective Height Above Average Terrain) is a measure of how high an antenna site is above the surrounding landscape. HAAT is used extensively in FM radio and television, as it is more important than effective radiated power (ERP) in determining the range of broadcasts (VHF and UHF in particular, as they are line of sight transmissions).