128 A WORLD ATLAS OF ATMOSPHERIC RADIO REFRACTIVITY 



Table E-4. (Continued) 



45 Profiles Skipped 

 164 Profiles Read 

 Number of Ducts 79 

 Number of Superrefractive Layers 40 



CUMULATIVE DISTRIBUTION OF TRAPPING FREQUENCIES, STATION 90001, MONTH 5 



CUMULATIVE DISTRIBUTION OF SUPERREFRACTIVE LAYER GRADIENTS, STATION 90001, MONTH 5 



THICKNESS AND GRADIENT OF SUPERREFRACTIVE LAYERS OVER 300 METERS THICK 



0.30000 



-106.66667 



