LOGACS (OPS 5557)

LOGACS (Low Gravity Accelerometer Calibration System) was an extremely sensitive accelerometer, which was flown in May of 1967 in satellite orbit and successfully gathered approximately 100 hr of precise deceleration data. A unique feature of the experiment was the accurate calibration of the accelerometer in the orbital environment at a level commensurate with the very low non-conservative forces to be sensed.

LOGACS (Module 474) was mounted as a piggy-back payload on an Agena-D stage, which orbited the KH-7 37 reconnaissance satellite. Also mounted on the stage was an Agena engine diagnostics payload (Module 473).