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ADDJUST-A View of the First 25 YearsVarious technologies and innovative launch operations were
developed during the 50 years of the Centaur upper stage—the
first launch vehicle to use high performing liquid hydrogen fuel.
One innovation was “ADDJUST”, which enabled the successful
negotiation of upper level winds measured only hours before
launch. Initial causes for its creation, development, and operation
during countdown are detailed. Problem definition, wind
measuring/monitoring process, pitch and yaw steering coefficient
generation, loads analysis, angle of attack, major
risks/concerns, and anecdotal recollections are provided.
Launch availability improved from as low as 55 to 95 percent
due to ADDJUST, which is still in use.
Document ID
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Nieberding, Joe
(Emeritus Cleveland, OH)
Williams, Craig H.
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
June 9, 2015
Publication Date
May 1, 2015
Subject Category
Meteorology And Climatology
Launch Vehicles And Launch Operations
Report/Patent Number
Meeting Information
Meeting: AIAA/ASME/SAE/ASEE Joint Propulsion Conference
Location: Cleveland, OH
Country: United States
Start Date: July 28, 2014
End Date: July 30, 2014
Sponsors: American Society for Engineering Education, American Society of Mechanical Engineers, American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 526310.04.08.03
Distribution Limits
Public Use Permitted.
Upper level winds
Atlas Centaur
Booster steering
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