392 PROPAGATION THROUGH THE STANDARD ATMOSPHERE 
ia 
CURVES | i 
64) | a a rece I BEeZ 
i 
fee ete ee 
(See Figure 14 
FicurE 19. sas a function of u and v. 
for definition of lengths.) 
d 
dr 
The advantage of this substitution lies in the fact 
that the coefficients of s = d;/d in the cubic equation 
(74) may be expressed as functions of u and-v only. 
Thus, 
hy 
k 1 
e—Se—4{ Ba.+m) - 4] + halt =o, 
(100) 
v= 
‘OC ia 7 
1 
3=0.6 
5 cy 
ri 
ry 
“Gr 
Ficure 20. s as a function of u and ». (See Figure 
14 for definition of lengths.) 
In terms of wu and 2, 
38, sfl+tu Dy 
Poaceae 1) += 8 
Figures 19 and 20 show contours of constant s 
plotted in u, » coordinates. The curves are parab- 
olas. 
The divergence factor D is given by 
1 
(101) 
(102) 
or D EE =———S—— 
V1 + 4p%q/(1 — p?)’ 
Pol ee s| + ha/hx) ] HPI Sopastar mee ce + 4p°q/(1 — p*) 
2 2 L d/(2kahy) 2d?/(2kah;) pe 
D:999.080 7.0 60 $0 45.0395 4.0 35 309 Ds9__27 2.5 
se 
i a 
DIVERGENCE AND PATH DIFFERENCE CONTOURS 
DIVERGENCE D 
— — — PATH DIFFERENCE R 
FicuRE 21. 
Contours of constant divergence factor D and path difference variable R. 
1.0 L2 14 1.6 1.8 
(Radiation Laboratory.) 
