APPENDIX C 79 



60- 



A. 



70 1 



180 150 120 90 60 30 



70 



30 60 90 120 150 180 



Figure C-31. Percent of time trap-ping frequency < 300 Mc/s: February. 



180 150 120 



30 60 90 120 150 BO 



60- 



A. 



70 1 



180 150 120 90 60 30 



£U- 



70 



30 



60 



120 150 



Figure C-32. Percent of time trapping frequency < 3000 Mc/s: May. 



