Space Integrated GPS/INS (SIGI)

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SIGI - Front View
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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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[edit] Notes and references

  1. ^ Lessons Leamed from Two Years of On-Orbit Global Positioning System Experience on International Space Station. PDF. NASA Johnson Space Center. Retrieved on 2006-09-27.
  2. ^ H-IIA Transfer Vehicle. Web Site. Japan Aerospace Exploration Agency (JAXA). Retrieved on 2006-10-01.
  3. ^ Independent Assessment of X-37 Safety & Mission Assurance Processes and Design Features. PDF. NASA Headquarters Office of Safety & Mission Assurance. Retrieved on 2006-09-27.
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