a^a 



MC^^- 





ESSA 



AVCS BRIT 



7 DAY COM, 



VT 21/ 3/e' 



TO 27/ 3/e' 



NAP PM5 



(Booth and Taylor) 



Figure 17 Nine-day minimum brightness composites,! to 9 March 1967 



northern hemisphere, ESSA 3 



30 



