Labels:text | diagram | drawing | sketch OCR: IRAS ORBIT CHARACTERISTICS CIRCULAR NEAR-POLAR INCLINATION 900 KM ALTITUDE · 14 REVS PER DAY SUN-SYNCHRONOUS TWILIGHT CHILTONE TWO PASSES PER DAY AT CHILTON CONTROL CENTER · DATA RECEIVED FROM SATELLITE * COMMANDS SENT TO SATELLITE 3. 85 ARCMIN PER SECOND SCAN RATE TELESCOPE FIELD OF VIEW