## The Effect of Solar Radiation Pressure on the Spin of Explorer XII |

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Aeronautics and Space approximate equation approximate solution assumed August axis is derived brace complicated components considered D-1185 National Aeronautics derived that includes developed which permits direct duced earth EFFECT OF SOLAR equal equation is applied equation is developed equation of motion essentially explain the observed EXPLORER XH Explorer XII expression factor force geometry includes solar radiation integration J. V. Fedor J. V. NANA LAUNCH magnetic mean NANA TECHNICAL NOTE NASA NANA 55 neglected observed increase obtained orbit OTS price percent permits rapid calculation projected area quantity radiation torques produced Reference reflected light satellite spin axis shadowing shown in Figure shows solar paddle array SOLAR RADIATION PRESSURE solar radiation torques solar torques solved to explain Space Administration SPIN OF EXPLORER sunline-spin axis angle TECHNICAL NOTE D-1185 term tion torques on satellite vector XII and solved zero