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Portable Network Graphic  |  1997-05-03  |  4.1 KB  |  320x240  |  4-bit (3 colors)
   ocr: Orbital measurements (apogee, perigee, inclination, period, etc.) of one celestiall body in relation to another at given times. Inspace flight, the orbital measurements ofaspacecraft are relative to the celestial body about which itorbits. EXIT