THE REUSABLE LUNAR LANDER STUDY WILL INVESTIGATE THE ROCKET EXHAUST PLUME EFFECTS UPON A REUSABLE LUNAR LANDER IDENTIFYING AND QUANTIFYING ANY CONCERNS WITH LUNAR DUST CONTAMINATION AND EJECTA DAMAGE TO THE LANDER INCLUDING CUMULATIVE EFFECTS DUE TO ITS REUSABILITY. THE STUDY WILL CONSIDER THE PLUME EROSION RATE OF EJECTA REFLECTION OF EJECTA OFF SURROUNDING TERRAIN IMPACT DAMAGE ON THE SPACECRAFT MATERIALS ELECTROSTATIC EFFECTS FROM THE CHARGED PLUME OR ANY OTHER ASPECT OF THE PHYSICS AS DIRECTED BY NASA.