22 August 2017 Metrology for trending alignment of the James Webb Space Telescope before and after ambient environmental testing
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Abstract
NASA’s James Webb Space Telescope (JWST) is a 6.6m diameter, segmented, deployable telescope for cryogenic IR space astronomy. The JWST Observatory architecture includes the Optical Telescope Element (OTE) and the Integrated Science Instrument Module (ISIM) element which contains four science instruments (SIs). Prior to integration with the spacecraft, the JWST optical assembly is put through rigorous launch condition environmental testing. This work reports on the metrology operations conducted to measure changes in subassembly alignment, including the primary mirror segments, the secondary mirror to its support structure, the tertiary mirror assembly to the backplane of the telescope and ISIM.
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Theo Hadjimichael, Raymond G. Ohl, Josh Berrier, Jeff Gum, Joseph Hayden, Manal Khreishi, Kyle McLean, Kevin Redman, Joseph Sullivan, Greg Wenzel, William Eichhorn, Jerrod Young, "Metrology for trending alignment of the James Webb Space Telescope before and after ambient environmental testing", Proc. SPIE 10377, Optical System Alignment, Tolerancing, and Verification XI, 103770I (22 August 2017); doi: 10.1117/12.2273991; https://doi.org/10.1117/12.2273991
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