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21 September 2012 Cryogenic performance test results for the flight model JWST fine guidance sensor
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The flight model Fine Guidance Sensor (FGS) on the James Webb Space Telescope (JWST) has successfully completed its performance verification tests. The FGS cryogenic test is described along with some of the key guider performance results which have been obtained. In particular we describe the noise equivalent angle (NEA) performance as a function of guide star magnitude for the guider tracking mode. Tracking mode must be able to follow a guide star moving across the field of view of either guider, primarily to allow the Observatory line of sight to settle in advance of the fine guidance mode. FGS tracking mode will also be used for JWST’s moving target observing mode. The track testing made use of the two movable sources within our JWST telescope simulator. The NEA of the FGS-Guiders will in part determine the ultimate image quality of the JWST Observatory.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Neil Rowlands, Sandra Delamer, Craig Haley, Eric Harpell, Maria B. Vila, Gerry Warner, and Julia Zhou "Cryogenic performance test results for the flight model JWST fine guidance sensor", Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 84423K (21 September 2012);


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