170 

 165 

 160 



o> 155 



z 



I 150 



-G 



©O O 



O O OG 



_© 



O-O- 



O 

 G G "^O 



G X AVERAGE OF READINGS 

 A -^ AT 2 HOUR INTERVALS 



OVER EACH 24 HOUR 



PERIOD 



Q G® G 



1^ 



pO, 



T 



-G-O NORMAL 



^OPERATING 

 LIMITS 



NORMAL UPPER 

 LIMIT 



O 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Days 



Figure 21. Fluctuation of p02 and pC02 over 28-day period. 



E 

 E 



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Mission Day 



Figure 2Z. Typical daily variations in pC02 



11-37 



