422 PROPAGATION THROUGH THE STANDARD ATMOSPHERE 
A= 6 METERS 
SEA-WATER 
hy IN METERS 
‘ es 
‘ 0620 
” ar 
CAAA Pat 
20 
10 
5 
2 
u 100 200 225 250 275 300 325 350 
a Ps Jaqeneee 
Ficure 50. Maximum range for A = 6 meters, vertical polarization. See equation (186). 
a. h, and h, are antenna heights, For horizontal polarization, 
b. Eo is the value of EF fora doublet in free space, Qaka\2/3 14.2 X 10! 
c. 5is the ground parameter which depends on 5= (ge —1) = Se (e, — 1) 
the complex dielectric constant €, = e,—j60cn. 
For vertical polarization, 
Na ze" Gee We ele) 6 Ee al 
ahs eo edn Nee €¢ where 
forse a= 2x \" 
5 (198) xia? 
