RAINFALL ATTENUATION CLIMATOLOGY 



301 



6 7 8 9 10 20 30 40 50 60 70 80 100 



HOURS THAT THE ORDINATE VALUE WAS EXCEEDED 



200 



Figure 7.24. Excess path loss due to rainfall versus hours per year at Mobile, Ala. 

 (After Hathaway and Evans, 1959). 



40 



35 



Z 



o 

 cr 

 < 30 



o 



2 25 



Q 



< 



^ 20 



15 





20 



30 



40 50 60 70 80 100 



200 



300 400 



Figure 7.25. Additional outage time expected for 11 Gc/s systems having a fading 



margin less than 40 dB. 



