406 PROPAGATION THROUGH THE STANDARD ATMOSPHERE 
SENN 
a eee 
j= a es 
Sra 7 ae a 
Ficure 30. Values of (3 &/4)”. 
=e 
proreet| 
aa 
= 
Ca 
CA 
i 
fener 
aaa 
= 
et tA 
resenting the increase over lh by g, we have where 
f = glh. (156) iz ( =) (158) 
For the dielectric case 6 >> 1, refer to equation ka : 
(193) to define 6. es Zy" (159) 
ae 60 3k. 
gi =10:1356) (chine Omens (157) See Figures 35 and 36. 
FREQUENCY IN MEGACYCLES 
70 100 200 300 ia 700 1000° 2000 3000 5000 10,000 20000 30,000 
— ado ocia route 
FOR USE miu SHADOW FACTOR Fs | 
k =4/3 baal HHL 
aa eae Pee Reo mee el) [pesese= res ert) 
ee 
Hao 
8 BSS She gS SSS SS ESS 
tH tere eet H a 
DIELECTRIC CASE] | | LA 
Ac ese 
is oi eas fe eaerer 
Hee Hes al ae a 
i ww pee ware 
sf (6) 
eee | | PUTT ee 
Br | 
| 
: alll OCCA IEEE 
ot 
WAVELENGTH IN METERS 
Fieure 31. sf(6) versus wavelength and frequency. For dielectric earth and k = 4/3, f(6) = 1, ands = 4.43 X 10° 51/3, 
(See Figure 57 for f(6).) 
