LU 

 U 



60 







UJ 





u 



40 



z 





LU 





a: 



LU 



20 



LL 





u. 





a 



UO 



LU 





< 



80 



X 





a. 







60 





40 





20 



TIME (GMT) 



Figure 7. Charleston, South Carolina: Haiku-Forestport, 10.2-kc/s Omega phase 

 difference (8 to 11 Mar 65). 



Results 



Comparison of the observed and computed phase 

 differences permits a system evaluation in the area. * 

 Three periods will be considered separately, namely: 

 night (when all component propagation paths are dark); 

 day (all illuminated); and transition (mixed). During each 

 period, each observed value has been compared with the 



*Because of present prediction limitations, measurements 

 including propagation over paths less than 700 n.mi. or in 

 arctic regions have been excluded from the analysis. 



22 



