Inertial Reference Module (IRM)
Aggregate Performance
Attitude Knowledge 0.043° 1-σ
Pointing Accuracy 0.057° 1-σ
Max Slew Rate 3°/s precision slew, >3°/s coarse slew
Mass 610 grams
Dimensions 83 x 83 x 53 mm
Integrated Components
Orthogonal Star Trackers (x2) Pitch/Yaw/Roll Accuracy 10/10/80” 1-σ
Update Rate 6 Hz
Lost-In-Space Solution Time < 500ms
Total Operating Power 1.0W (both cameras active)
Field of View 16.8 x 12.6°
Star Sensitivity Greater than magnitude-6
Celestial Coverage > 99%
3-Axis MEMS Gyro Bias Instability 3 °/hr
Angular Random Walk 0.1 deg/√hr
Power Consumption 100 mW
Reaction Wheels (x3) Momentum Storage 10 mN∙m∙s
Max Torque 3 mN∙m
Max Speed 10000 RPM
Steady State Power @ 5000 RPM 200 mW
Torque Coils (x3) Dipole Moment 0.1 A∙m^2
Power Consumption < 750mW peak (duty cycle dependent)
Spacecraft Command & Data  Handling (C&DH) Processor Operating System Tyvak Linux BSP
Processor Architecture ARM9
Clock Speed 400 MHz
LINPACK Benchmark 4 MFLOPS
RAM 64 MB
Nonvolatile Memory 32 MB Phase Change Memory 1 GB NAND-Flash8 GB SD-card
Power Consumption < 200mW
Attitude Determination & Control Processor Operating System Tyvak Linux BSP
Processor Architecture ARM Cortex A8+ DSP Coprocessor
Clock Speed 800 MHz
LINPACK Benchmark 38 MFLOP
RAM 512 MB
Nonvolatile Memory 512 MB NAND-Flash 8 GB SD-card
Power Consumption < 1.0 W