44 



TRANSMISSION EXPERIMENTS AT ANTIGUA, WEST INDIES 



100 



40 60 80 100 1 20 140 160 



RANGE IN NAUTICAL MILES 



20 40 60 80 100 120 140 160 



RANGE IN NAUTICAL MILES 



Figure 18. Composite S-band run field strengths, 

 March 15. 



Figure 19. Composite X-band run field strengths, 

 March 15. 



40 60 80 100 120 



RANGE IN NAUTICAL MILES 



RADAR ECHO STRENGTH VS RANGE 



-APS-t5A RADAR' 



II APRIL 1945 



ANT HT 



6 FT 

 6 FT 

 14 FT 

 54 FT 

 94 FT 

 6 FT 



DIAM DISH 



48 IN. 



29 IN. 



29 IN.— ■ 

 39 IN. 

 29 IN.— 



29 IN, 4 APR 



l_ 



^\ 



-*»-=; 



20 25 30 35 



RANGE NAUTICAL MILES 



Figure 20. Comiiosite X-band run field strengths, 

 April 10 to 11. 



Figure 21. Radar echo strength versus range for 

 various antenna heights. 



