418 PROPAGATION THROUGH THE STANDARD ATMOSPHERE 
FREQUENCY IN MEGAGYCLES 
atom 2000 400 200 40 
10, 300) 1000 500 300 100 50 30 20 10 
TIER GeS Gn EE NNN 08 I ee 
100 MES eS OS 
Be PN SEEN SS Ge ee 
CUE Cl ED ENCES Se) === SSS 
5 eee RN il en ee 
All cial area AKC reer Ia fe 
{| 
WOE) \ INN 
(UCT ONS 
agee Se rN Sas a 
-+ {+++} —_] Gaara SN emnenie canna 
0s (ie ae S| 
NOOO Sear 
TMA NSC 
eae INNS 
NN 
H CIN 
eS SFE Se 
SEAS NSB 
1s oe aa Ns NO 
(00D O 222 ae eee RSS STS 
NAM 
HET SRN 
eR See 
oe POLARIZATION eee 
wT | 
ot 
fal a 
OF 0.3 
WAVELENGTH © 
IN METERS 
bea GE ee 
Ficure 46. Parameter / versus frequency for vertical polarization. See Table 10. 
Equation (185), including the correction for 
d < 50/p’, becomes 
F, 
A= — (Arp'd) (gg'h)x(ga’h)s, (187) 
which can be written 
ih F 
A=177X 10-7 s |a 'd 188 
G a)? ip'dy ( ) 
or 
+ 20 log A 
20log A = a aca a 
+ 20 log p’d+ 20logy. (189) 
Since F, has a graphical representation which de- 
pends on the wavelength, it is necessary to assume 
a particular value of \; equation (188) then becomes 
