504 



BELL SYSTEM TECHNICAL JOURNAL 



30 



20 



4.7 METERS 



10 



^V\A/VyVM| 



4:00 P.M 



4=30 P.M. 

 EASTERN STANDARD TIME 



5:00 P.M. 



Fig. 11 — Comparison of simultaneous active fading on two slightly different wave- 

 lengths, vertically polarized transmission. 



30 



20 



10 



1:30 P.M. 



1:35 RM. 1:40 RM. 



EASTERN STANDARD TIME 



1:45 RM. 



Fig. 12 — -Comparison of simultaneous "scintillation" fading on two slightly 

 different wave-lengths, vertically polarized transmission. The time scale has been 

 expanded. 



Effect of Distance and Antenna Height on Fading 



In planning this work a survey for a receiving site was made by 

 means of a portable receiver in a car. Later, simultaneous reception 



