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Portable Network Graphic  |  1990-01-27  |  4KB  |  512x342  |  4-bit (4 colors)
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OCR: Circle radius (a) equals semi- major x=a*cos(E)= V = orbit angle axis (x,y) E = eccentric anomaly Apogee y+b*sin(E) E -Perigee Circle radius ( b) - equals semi-minor axis Earth Orbit ellipse