90 A WORLD ATLAS OF ATMOSPHERIC RADIO REFRACTIVITY 



180 150 120 90 60 30 30 60 90 120 150 



180 



Figure C-53. Lapse rate of refractivity (N/fcm) exceeded 25 percent of time for 100-m layer: November. 



180 150 120 90 60 



30 60 90 120 150 180 



FIGURE C-54. Lapse rate of refractivity (ti/km) exceeded 10 percent of time for 100-m layer: November. 



