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 flight.

SIGI has integrated global positioning and inertial navigation technology to provide three navigation solutions : Pure inertial, GPS-only and blended GPS/INS.

Current and Future Usage

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.[needs update]

See also


  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. Archived from the original (PDF) on 2006-10-02. Retrieved 2006-09-27.

External links

  • Relative Navigation and Attitude Determination Near the International Space Station