PLANE EARTH GAIN FACTOR 
pid 
Peery 
4.26 PROPAGATION THROUGH THE STANDARD ATMOSPHERE 
(— 0? +160 0)? 
€° +(600)* 
€, +(600%) 
Fiaure 56. Plane earth gain factor A, versus p’d. A; = 
functions, to the first approximation, are inde- 
pendent of n. 
als = Ve— 
N 
«1 ]tor vertical polarization, 
€¢ 
f(h) = 1 
(196) 
20270. ims . ANaahes 
S(t) =14+4 i Ve— i] for horizontal polarization 
<— Perfect Conductor 
1,0 
0.9 
FOR VERTICAL POLARIZATION 
TT TT ett 
a ea 
BB ‘it 
ii 
ree LIM LL UT 
cad 
ll 
nts 
100 500 1000 
DECIBELS 
60 
10 
pid=(27 ankSrs +(60 0)? FOR HORIZONTAL POLARIZATION| 
1/(p'd) for p'd >50. 
Note that the magnitudes of the bracketed quantities 
are equal to lh. The magnitude of f has been denoted 
by Hy, and is represented in Figure 47 as a function 
of lh. The phase of the bracketed quantities in 
equation (196) is taken into account by using differ- 
ent curves with the parameter Q = ¢,/60cd. For 
large values of lh, Hz, — Ih. 
(b) For elevated antennas (h >> 307°). The 
Dielectric Eart h—> 
Te 
100 1000 fac 
18] 
Ficure 57. (5) versus 6. Solid lines correspond to phase of 6. Dotted lines indicate curve in Figure 58. For horizontal 
polarization f(6) = 1. 
