- 
wu 
w 
ire 
= 
& 
3 
w 
= 
TOTAL M DEFICIT 
APPENDIX 507 
Ts 
HEIGHT. oF pucT 
16 DIVIDED BY. 
EFFECTIVE M DEFICIT 
WIND SPEED 
SLOPE IN FEET 
() 5 10 15 20 25 
SURFAGE WIND SPEED IN KNOTS 
Fiaure 15. Effective M-curve slope versus wind speed. 
50 
RECEIVED SIGNAL — DB BELOW 1 WATT 
> 
° 
RANGE IN NAUTICAL MILES 
Fiaure 18. Composite S-band run field strengths, 
SURFACE WIND SPEED IN KNOTS 
Ficure 16. Height of M deficit versus wind speed. 
X BAND 
Borer M DEFICIT 15 MARCH, 1945 
wind SPEED 
ISOPLETHS OF 
DUCT HT DIVIDED BY 
45 |— TOTAL M DEFICIT 
E 
<q 
o 
a 
é 
w 
40 a 
o 
) 
i) 
=) 
< 
aa & 
35 a 
AN a 
w 
= 
wi 
ce) 
Ww 
C3 
30 
Dy 
t+) 20 40 60 80 100 ©6120) «=6140 «6160 
RANGE IN NAUTICAL MILES 
SURFACE WIND SPEED IN KNOTS 
Fiaure 17. Total M deficit versus wind speed. Ficure 19. Composite X-band run field strengths. 
