ACTIVE THERMAL 

 CONTROLLER LOUVERS 



APT 

 CAMERAS 



REAL-TIME 

 ANTENNA 



MIRROR 



SOLAR PANEL 



DEPLOYMENT 



ACTUATOR 



FLAT PLATE 

 RADIOMETER 



BASEPLATE 



THERMAL FENCE 

 OUTER RING 



S-BAND 

 ANTENNA 



DIGITAL 



SOLAR ASPECT 



INDICATOR 



COMMAND 



AND 



BEACON ANTENNA 



SOLAR PROTON SENSORS SHOWN IN 

 THIS CORNER FOR CLARITY. 

 ACTUAL LOCATION IS IN CORNER 

 CONCEALED BY MOMENTUM WHEEL. 



Figure 24 ITOS (TIROS 



(Radio Corporation 

 of America) 



44 



