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- W2495261005 abstract "The external starshade is a method for the direct detection and spectral characterization of terrestrial planetsaround other stars, a key goal identified in ASTRO2010. In an effort to validate the starlight-suppression performance ofthe starshade, we have measured contrast better than 1×10-9 using 60 cm starshades at points just beyond the starshadetips. These measurements were made over a 50% spectral bandpass, using an incoherent light source (a white LED), andin challenging outdoor test environments. Our experimental setup is designed to provide starshade to telescopeseparation and telescope aperture size that are scaled as closely as possible to the flight system. The measurementsconfirm not only the overall starlight-suppression capability of the starshade concept but also the robustness of the setupto optical disturbances such as atmospheric effects at the test site. The spectral coverage is limited only by the optics anddetectors in our test setup, not by the starshade itself. Here we describe our latest results as well as detailed comparisonsof the measured results to model predictions. Plans and status of the next phase of ground testing are also discussed." @default.
- W2495261005 created "2016-08-23" @default.
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- W2495261005 date "2016-07-29" @default.
- W2495261005 modified "2023-10-01" @default.
- W2495261005 title "Measurements of high-contrast starshade performance in the field" @default.
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- W2495261005 doi "https://doi.org/10.1117/12.2232841" @default.
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