The Solar Radiation and Climate Experiment (SORCE) Mission for the NASA Earth Observing System (EOS) -- The SORCE Mission -- SORCE Contributions to New Understanding of Global Change and Solar Variability -- An Overview of the Disposition of Solar Radiation in the Lower Atmosphere: Connections to the SORCE Mission and Climate Change -- The SORCE Spacecraft and Operations -- The Total Irradiance Monitor (TIM): Instrument Design -- The Total Irradiance Monitor (TIM): Instrument Calibration -- The Total Irradiance Monitor (TIM): Science Results -- The Spectral Irradiance Monitor: Scientific Requirements, Instrument Design, and Operation Modes -- The Spectral Irradiance Monitor: Measurement Equations and Calibration -- The Spectral Irradiance Monitor (SIM): Early Observations -- Solar-Stellar Irradiance Comparison Experiment II (SOLSTICE II): Instrument Concept and Design -- Solar-Stellar Irradiance Comparison Experiment II (SOLSTICE II): Pre-Launch and On-Orbit Calibrations -- Solar-Stellar Irradiance Comparison Experiment II (SOLSTICE II): Examination of the Solar-Stellar Comparison Technique -- The Mg II Index from SORCE -- XUV Photometer System (XPS): Overview and Calibrations -- XUV Photometer System (XPS): Solar Variations During the SORCE Mission -- The SORCE Science Data System.