218 
(21). The integrated form of equation (21) is equa- 
tion (8), where the approximation 
(22) 
Then 
RADIO WAVE PROPAGATION EXPERIMENTS 
2hi 
1 
TT TT 
(23) 
has been made. 7 is the average temperature defined eng foe jubis Hacer care 
by equation (9) or, more roughly, by equation (10). h, dh hi 
An estimate of the order of accuracy of this approxi- | in 
mation may be obtained from an examination of the 
case in which T varies linearly with h. Let the refer- a 2hu [ Ti=To a Ceara 96 | 
ence level temperature be 7, at h = 0 and the tem- T:—ToLMi+T. 3\Ti+To 
perature at the height h, be T,. (24) 
7 sx Aan —2 added to t< Ol. 
TaBLe 11A. Au for ¢* ~ 0. Values to be multiplied by h x 10-2 and ecg fromé “ for B ss 0 
NUE 
CANN 250 260 270 280 290 300 310 320 330 340 350 360 370 
*#= temperature in degrees centigrade averaged from the ground to the height h. 
* Aan -2 added to E< 0). 
TaBLe 11B. Au for ¢* ~ 0. Values to be multiplied by h.x 10-2 and seer fromt & for es 
Noe 
t \_ 370 380 390 400 410 420 430 440 450 460 470 480 490 500 
+10 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 
+20 0.3 0.3 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.5 
+30 0.5 0.5 0.5 0.5 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.7 0.7 07 
+40 0.7 0.7 0.7 0.7 0.7 0.8 0.8 0.8 0.8 0.8 0.9 0.9 0.9 0.9 
*{ = temperature in degrees centigrade averaged from the ground to the height h. 
oe fs pare 2 added to t <0). 
TaBe 11C. Au for ?* ~0. Values to be multiplied by h x 10°? and ee from’ @ for wo 
Nee 
& XS | 20 260 270 280 290 300 310 320 330 340 
+10 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 
+20 0.2 0.2 0.2 0.2 0.3 0.3 0.3 0.3 0.3 0.3 
+30 0.3 0.3 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.5 
+40 0.4 0.5 0.5 0.5 0.5 0.5 0.5 0.6 0.6 0.6 
¥f = temperature in degrees centigrade averaged from the ground to the heichi h. 
> Red = added to t<0 
Taste 11D. Au fort* #0. Values to be multiplied by h x 10-2 and seen pey aml? for |= S ot D 
\ 
CaN 340 350 360 _ 370 380 390 400 410 420 
+10 0.1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 
+20 0.3 0.3 0.3 0.3 0.3 0.3 0.4 0.4 0.4 
+30 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.6 
+40 0.6 0.6 0.6 0.7 0.7 0.7 0.7 0.7 0.7 
xba temperature in degrees centigrade averaged from the ground to the height h. 
a s a0 yee o added to t<0 
TABLE 11E. Auwfort +0. Values to be multiplied by h x 107? Bud: beeen from ¢™ for}; S ot : 
NE : 
t 420 430 440 450 460 470 480 490 500 
+10 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 
+20 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 
+30 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.7 0.7 
+40 0.7 0.8 0.8 0.8 0.8 0.8 0.8 0.9 0.9 
*l= temperature in degrees centigrade averaged from the ground to the height h. 
