MPESS means Mission Peculiar Experiment Support Structure in NASA
Similar to MPESS
ACC - Aft Cargo CarrierACCA - Automatic Cloud Cover Assessment
ACCMS - Advanced Checkout, Control, and Maintenance System
ACCS - Advanced Checkout and Control System
ACE - Advanced Composition Explorer
ACE - Apollo Checkout Equipment
ACES - Acoustic Containerless Experiment System
View all in NASA