The compact Inertial Measurement Unit is 3.7" diameter and 1.9 pounds. Three boards: sensor card, digital card, and microcontroller card. The accelerometer/gyro unit contains 3 orthogonal accelerometers and laser ring gyros, and high-voltage laser power supply. 35/57
The accelerometers are Honeywell RBA-500 Vibrating Beam Force Transducer Accelerometers. Each uses a pair of vibrating quartz beams where the difference in oscillation frequencies depends on the applied force. 36/57
