Open AccessJWST cryo fine guidance closed loop test results
Author(s) -
Scott D. Lambros,
Maria Begoña Vila Costas,
David M. Diaz,
Henry Fu,
Seungyeol Lee,
Luis Meza,
Kevin J. Phillips,
Ben Del Rosario,
Jiang Wu
Publication year - 2018
Publication title -
space telescopes and instrumentation 2020: optical, infrared, and millimeter wave
Language(s) - English
Resource type - Conference proceedings
DOI - 10.1117/12.2311516
Subject(s) - james webb space telescope , computer science , observatory , controller (irrigation) , closed loop , attitude control , aerospace engineering , telescope , point (geometry) , simulation , test (biology) , control engineering , engineering , physics , optics , geology , astronomy , agronomy , geometry , mathematics , biology , paleontology
The James Webb Space Telescope uses the Fine Guidance Controller to achieve pointing accuracy to a millionth of a degree needed for its scientific observations. This closed loop controller includes the Fine Guidance Sensor instrument, the Attitude Control System, and the Fine Steering Mirror, all working together to generate precise attitude updates every 64 ms to stabilize and point the Observatory. It was exercised for the first time with the flight hardware during the cryogenic test at Johnson Space Center. We provide a top level summary of the test, the results, and its performance in preparation for on-orbit operations.
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