DRAC means SOI
Solar Oscillations Investigation/ MDI
Michelson Doppler Imager Data Reduction and Analysis Center in
NASA
Similar to DRAC
ABS - After Body Section
ABS - Air Breathing System
ABS - Air Base Supply
ABT - Approximate Burn Time
ABU - Analog Back- Up
ABU - After Body Unit
ABUP - Auxiliary Back- Up Plate
View all in NASA