DRAC means SOI
Solar Oscillations Investigation/ MDI
Michelson Doppler Imager Data Reduction and Analysis Center in
NASA
Similar to DRAC
ABV - Above
ABV - Air Bubble Vehicle
AC - Aerodynamic Center
AC - Comptroller Office
AC - Alternating Current
AC - Assembly Complete
ACBM - Active Common Berthing Mechanism
View all in NASA