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SOSS Bright Limits. Bright limits are based on NISRAPID readout with 1 integration and 2 groups with the SUBSTRIP256 subarray. Bright limits vary by Δ-mag = 0.7 for Full Frame readout and Δ-mag = -1.0 for SUBSTRIP96 readout (order 1 only).
11 Ιουλ 2024 · The precise optical alignment of the telescope optics for JWST is achieved and maintained using wavefront sensing imagery from the science instruments, particularly NIRCam, as well as actuators on the back of each mirror segment (including the secondary mirror).
Several OTE electronics boxes support the use of actuator mechanisms and related sensors for position, and to handle telemetry. An actuator drive unit in the spacecraft interfaces with these electronic boxes.
telescope pointing and the association between images and segment tilts, it will be possible to know the location of each segment image, relative to the established boresight. Figure 4.
22 Αυγ 2012 · The James Webb Space Telescope (JWST) Optical Simulation Testbed (JOST) is a tabletop experiment designed to study wavefront sensing and control for a segmented space telescope, such as JWST. With …
JWST’s FGS is used for identifying and acquiring guide stars, measuring their positions, and providing these data to the ACS for attitude determination and stabilization. The FGS has 2 channels (FGS1 and FGS2), each with 2.3×2.3 arcmin2 field of view (FOV).
The JWST mission and engineering requirements are structured in a hierarchical framework to document the allocation of derived lower-level “children” requirements to the various system segments (Ground Segment, Launch Segment, Observatory Segment) and then to the elements, which, for the Observatory Segment, consist of the OTE, SCE,
