TOTAL NUMBER OF PASSES PER PERIOD 



w 

 < 



o 

 w 



CQ 



< 

 E- 

 O 

 E- 



50 



125 



100 



75 



50 



25 





 20 



• PIT 823 N-665 

 T PTT 839 N=528 

 ■ ALL PITS 

 COMBINED N=1446 



D PTT 825 N = 30 

 O PTT 827 N = 22 

 V PTT 831 N = 23 

 O PTT 833 N=112 

 A PTT 840 N = 86 



10 - 







Figure 13. A comparison of the total number of passes received during 6-hour summary 

 periods for PTTs #823, #825, #827, #831, #833, #839 and #840. 



31 



