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Ambient Optomechanical Alignment and Pupil Metrology for the Flight Instruments Aboard the James Webb Space TelescopeThe James Webb Space Telescope science instruments are in the final stages of being integrated into the Integrated Science Instrument Module (ISIM) element. Each instrument is tied into a common coordinate system through mechanical references that are used for optical alignment and metrology within ISIM after element-level assembly. In addition, a set of ground support equipment (GSE) consisting of large, precisely calibrated, ambient, and cryogenic structures are used as alignment references and gauges during various phases of integration and test (I&T). This GSE, the flight instruments, and ISIM structure feature different types of complimentary metrology targeting. These GSE targets are used to establish and track six degrees of freedom instrument alignment during I&T in the vehicle coordinate system (VCS). This paper describes the optomechanical metrology conducted during science instrument integration and alignment in the Spacecraft Systems Development and Integration Facility (SSDIF) cleanroom at NASA Goddard Space Flight Center (GSFC). The measurement of each instrument's ambient entrance pupil location in the telescope coordinate system is discussed. The construction of the database of target locations and the development of metrology uncertainties is also discussed.
Document ID
20140017409
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Coulter, Phillip
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Beaton, Alexander
(COM DEV Ltd. Cambridge, Ontario, Canada)
Gum, Jeffrey S.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Hadjimichael, Theodore J.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Hayden, Joseph E.
(Sigma Space Corp. Lanham, MD, United States)
Hummel, Susann
(European Aeronautic Defence and Space Co. Bremen, Germany)
Hylan, Jason E.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Lee, David
(United Kingdom Astronomy Technology Centre United Kingdom)
Madison, Timothy J.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Maszkiewicz, Michael
(Canadian Space Agency Saint Hubert, Quebec, Canada)
Mclean, Kyle F.
(QinetiQ North America Waltham, MA, United States)
McMann, Joseph
(QinetiQ North America Waltham, MA, United States)
Melf, Markus
(European Aeronautic Defence and Space Co. Bremen, Germany)
Miner, Linda
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Ohl, Raymond G.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Redman, Kevin
(QinetiQ North America Waltham, MA, United States)
Roedel, Andreas
(European Aeronautic Defence and Space Co. Bremen, Germany)
Schweiger, Paul
(Lockheed Martin Corp Greenbelt, MD, United States)
Plate, Maurice T.
(European Space Agency Paris, France)
Wells, Martyn
(United Kingdom Astronomy Technology Centre United Kingdom)
Wenzel, Greg W.
(QinetiQ North America Waltham, MA, United States)
Williams, Patrick K.
(SGT, Inc. Greenbelt, MD, United States)
Young, Jerrod
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
December 16, 2014
Publication Date
August 17, 2014
Subject Category
Optics
Engineering (General)
Report/Patent Number
GSFC-E-DAA-TN16576
Meeting Information
Meeting: SPIE Optics + Photonics
Location: San Diego, CA
Country: United States
Start Date: August 17, 2014
End Date: August 21, 2014
Sponsors: International Society for Optical Engineering
Funding Number(s)
CONTRACT_GRANT: NNG12CR29C
CONTRACT_GRANT: NNG12CR31C
OTHER: 2014-551-JWST
CONTRACT_GRANT: NAS5-02105
CONTRACT_GRANT: NNG08CA01C
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Optomechanical Alignment
Pupil Metrology
Flight Instruments
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