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Portable Network Graphic  |  1990-01-27  |  3KB  |  440x235  |  1-bit (2 colors)
Labels: diagram | text | line | circle
OCR: Circle radius (a) equals semi-major x=a*cos(E)> U = orbit angle axis (x,y) E = eccentric anomaly Apogee y=b*sin(E) TE > Perigee Circle radius ( b) equals semi-minor axis Earth Orbit ellipse