Space Integrated GPS/INS

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 Orion, which is scheduled to replace the Space Shuttle.

See also

• Miniature Inertial Measurement Unit (MIMU)
• Air navigation
• Spherical trigonometry

References

1. "Lessons Leamed from Two Years of On-Orbit Global Positioning System Experience on International Space Station" (PDF). PDF. NASA Johnson Space Center. Retrieved 2006-09-27.
2. "H-IIA Transfer Vehicle". Web Site. Japan Aerospace Exploration Agency (JAXA). Archived from the original on September 28, 2006. Retrieved 2006-10-01.
3. "Independent Assessment of X-37 Safety & Mission Assurance Processes and Design Features" (PDF). PDF. NASA Headquarters Office of Safety & Mission Assurance. Retrieved 2006-09-27.

External links

• Relative Navigation and Attitude Determination Near the International Space Station