SIGI
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SIGI - Front View

Space Integrated GPS/INS (SIGI) is a strapdown Inertial Navigation Unit (INU) developed and built by Honeywell International to control and stabilize spacecraft during missions. It has integrated global positioning/inertial navigation to provide three navigation solutions: Pure inertial, GPS-only and blended GPS/INS. SIGI have been employed on the International Space Station^[1], the Japanese H-II Transfer Vehicle (HTV)^[2] the Boeing X-37^[3] and X-40.

SIGI is also proposed as the primary navigation system for the Orion (spacecraft), which is scheduled to replace the Space Shuttle.

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See also

• SIGI - Honeywell Aerospace
• Relative Navigation and Attitude Determination Near the International Space Station
• Miniature Inertial Measurement Unit (MIMU)
• Air navigation
• Spherical trig

Notes and references