PTT 823 



w 



e- 



10 

 9 

 8 

 7 

 6 

 5 

 4 

 3 

 2 

 1 

 



A A 



A A 





% 



b5:^%\^^^°--- 



.^^ 





I [ S^ i 



■"f-i — I — I — I — I — \ — \ — I — I — I — I — 1 — I — 1 — 1 — 1 — 1 — 1 — I — 1 — I — M — I — I I T" 



18 SEP 28 SEP 08 OCT 28 OCT 

 DATE 1990 



PD 1 



PD 4 



PD 3 



PD 2 



PD i 



O =PER]OD 1 V =PERIOD 2 D = PERIODS A =PERI0D4 



Figure 11. Time and date of transmissions received for PTT #823. Periods (PD 1-4) 

 designate initial 2-hour transmission times. 



29 



