ALTITUDE IN FEET 
For very high sites (over 1,000 ft) and frequencies 
over 200 me. it is desirable to have a more accurate 
ALTITUDE IN FEET 
40900 
39000 
29000 
19900 
SITING AND COVERAGE OF GROUND RADARS 
hy = 500 FT 
f = 200 mc 
LOBES 
Ficure 52. Lobe angles for Example 11. 
The General Lobe Angle Formula 
Figure 53. Lobe angles for Example 12. 
DISTANGE IN MILES 
<a 
ee 
DEGREE ——>3 + 
\ 
( 
i 
\ 
I 
= 
= 
= 
a 
me 
105 
expression for the locus of constant path difference 
than is afforded by straight lines. This is of especial 
DISTANCE IN MILES 
DEGREES 
interest in the first few lobes as these determine the 
low coverage which is of great tactical importance. 
