IGF::OT::IGF RADIATION BUDGET INSTRUMENT (RBI)TRADE STUDIES IS A SCANNING RADIOMETER CAPABLE OF MEASURING EARTH'S REFLECTED SOLAR AND EMITTED THERMAL RADIANCE IN THREE SPECTRAL BANDS. RBI WILL CONTINUE THE SINGULARLY UNIQUE GLOBAL CLIMATE MEASUREMENTS OF THE EARTH'S RADIATION BUDGET PROVIDED BY THE CLOUDS AND THE EARTH'S RADIANT ENERGY SYSTEM (CERES) INSTRUMENT. THE SCOPE OF THIS TASK ORDER IS TO CONDUCT TWO TRADE STUDIES TO FURTHER INVESTIGATE RISKS IDENTIFIED BY THE GOVERNMENT CONCERNING THE RBI SOLAR AVOIDANCE CAPABILITIES. IN THE FIRST STUDY (#1) THE CONTRACTOR SHALL ASSESS AND DETERMINE CANDIDATE SOLUTIONS FOR SOLAR AVOIDANCE FOR THE FOLLOWING INSTRUMENT MODES OF OPERATION: 1) SURVIVAL; 2) SAFE; 3) ENGINEERING; AND 4) OPERATIONAL. IN THE SECOND TRADE STUDY (#2) THE CONTRACTOR SHALL ASSESS AND DETERMINE CANDIDATE SOLUTIONS FOR MAINTAINING OR MOVING THE INSTRUMENT TO A KNOWN POSITION DURING 1) OFF MODE PRIOR TO INSTRUMENT INITIALIZATION AND 2) UNPLANNED LOSS OF POWER FROM ANY OTHER MODE TO OFF MODE.