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Testing of the high accuracy inertial navigation system in the Shuttle Avionics Integration LabThe description, results, and interpretation is presented of comparison testing between the High Accuracy Inertial Navigation System (HAINS) and KT-70 Inertial Measurement Unit (IMU). The objective was to show the HAINS can replace the KT-70 IMU in the space shuttle Orbiter, both singularly and totally. This testing was performed in the Guidance, Navigation, and Control Test Station (GTS) of the Shuttle Avionics Integration Lab (SAIL). A variety of differences between the two instruments are explained. Four, 5 day test sessions were conducted varying the number and slot position of the HAINS and KT-70 IMUs. The various steps in the calibration and alignment procedure are explained. Results and their interpretation are presented. The HAINS displayed a high level of performance accuracy previously unseen with the KT-70 IMU. The most significant improvement of the performance came in the Tuned Inertial/Extended Launch Hold tests. The HAINS exceeded the 4 hr specification requirement. The results obtained from the SAIL tests were generally well beyond the requirements of the procurement specification.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Strachan, Russell L.
(Rockwell Space Operations Co. Houston, TX, United States)
Evans, James M.
(Rockwell Space Operations Co. Houston, TX, United States)
Date Acquired
September 6, 2013
Publication Date
October 1, 1991
Publication Information
Publication: NASA. Goddard Space Flight Center, Flight Mechanics(Estimation Theory Symposium, 1991
Subject Category
Spacecraft Instrumentation
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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