The Pegasus XL vehicle with the Solar Radiation and Climate Experiment SORCE satellite is moved east-southeast of Cape Canaveral.

The Pegasus XL launch vehicle, with the Solar Radiation and Climate Experiment (SORCE) satellite aboard, is moved underneath the L-1011 aircraft that will carry the Pegasus to the launch altitude of 39,000 feet over the Atlantic Ocean approximately 100 miles east-southeast of Cape Canaveral. SORCE, built by Orbital Sciences Corporation, will study and measure solar irradiance as a source of energy in the Earth's atmosphere. The launch of SORCE is scheduled for Jan. 25 at 3:14 p.m. from CCAFS.