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The OTE Pathfinder (for Optical Telescope … The OTE Pathfinder (for Optical Telescope Element Pathfinder), or James Webb Space Telescope Pathfinder, is a technology demonstrator/test article for the James Webb Space Telescope. It is a non-flight replica of the actual backplane, but only includes the center section not the two "Wings" on the side the extend and have additional segments on the actual JWST. It has been used for various tests and has some different configurations, but some of the major tests have been practicing installing mirror segments with non-flight hardware as well as thermal tests. The Pathfinder has also been tested in conjunction with flight hardware including the Aft Optics System. One of the goals and uses of the pathfinder is risk reduction for JWST program. The pathfinder allows practicing integration and testing procedures, and for risk mitigation With the Pathfinder it was possible to test phasing two mirrors together and also to do tests with the Aft Optical System. The OTE Pathfinder was part of the plan for integration and testing of JWST, and in particular supported the Optical Telescope Element (primary mirror, backplane, etc.). The OTE pathfinder uses two additional mirror segments, an additional secondary mirror, and puts together various structures to allow testing of various aspects of the section, including Ground Support Equipment. This supports the GSE being used on the JWST itself later on, and allows testing of mirror integration. OTE pathfinder has 12 rather than 18 cells compared to the full telescope, but it does include a test of the backplane structure. The pathfinder allowed practicing installing mirror segments with a non-flight mirror and non-flight backplane. Mirror installation is a task that necessitated practice due to the high-precision required. The Pathfinder backplane was completed in 2011. Three tests planned for the OTE Pathfinder were Optical Ground Support Equipment 1 (OGSE1), Optical Ground Support Equipment 2 (OGSE2), and Thermal Pathfinder. The Pathfinder was used with the Beam Image Analyzer (BIA) and another important related device is the AOS Source Plate Assembly (ASPA). ASPA provides infrared sources for doing optical testing.nfrared sources for doing optical testing.
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The OTE Pathfinder (for Optical Telescope … The OTE Pathfinder (for Optical Telescope Element Pathfinder), or James Webb Space Telescope Pathfinder, is a technology demonstrator/test article for the James Webb Space Telescope. It is a non-flight replica of the actual backplane, but only includes the center section not the two "Wings" on the side the extend and have additional segments on the actual JWST. It has been used for various tests and has some different configurations, but some of the major tests have been practicing installing mirror segments with non-flight hardware as well as thermal tests. The Pathfinder has also been tested in conjunction with flight hardware including the Aft Optics System. One of the goals and uses of the pathfinder is risk reduction for JWST program. The pathfinder allows practicing integration and tfinder allows practicing integration and t
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OTE Pathfinder
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