256 



TRANSHORIZON PARAMETERS 



-Lr REFLECTION LOSS IN dB 



-Lr REFLECTION LOSS IN dB 



-Lr REFLECTION LOSS IN dB 



-Lr REFLECTION LOSS IN dB 



Figure 6.16. Observed hourly median field strength versus reflection loss assuming the 



linear model of figure 6.15. 



For these conditions, the layers correspond to those of "intermediate" 

 size in the analysis of Friis, Crawford, and Hogg [22]. They are defined 

 by the inequality: 



\/2a \/a > X > \/2a\ 



(6.7) 



where 2a is the path length. In this case, the power received, Pr, from 

 an antenna of effective aperture, Ar, with a transmitter radiating a 

 power Pt from a antenna of effective aperture ^r is given by: 



Pr/Pt = {AtAr X2aV)/(2XV). 



(6.8) 



