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KENNEDY SPACE CENTER, FLA. -- The L-1011 aircraft soars through the sky over the Atlantic Ocean with a Pegasus XL rocket, containing NASA's Solar Radiation and Climate Experiment (SORCE), attached underneath. The rocket will be dropped from the aircraft at 3:14 p.m. EST. Over the next few days, the mission team will insure that the spacecraft is functioning properly. The SORCE science instruments will then be turned on and their health verified. Approximately 21 days after launch, if all is going well, the instruments will start initial science data collection and calibration will begin. The…