Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1117/12.2054680 |
Measurements of High-Contrast Starshade Performance | |
Glassman, Tiffany; Casement, Suzanne; Warwick, Steve; Novicki, Megan | |
通讯作者 | Glassman, Tiffany |
会议名称 | Conference on Space Telescopes and Instrumentation - Optical, Infrared, and Millimeter Wave |
会议日期 | JUN 22-27, 2014 |
会议地点 | Montreal, CANADA |
英文摘要 | The external starshade is a prospective method for the direct detection and spectral characterization of terrestrial planets around other stars, a key goal identified in ASTRO2010. As part of an ongoing campaign to validate the starlight-suppression performance of the starshade, we present our first results from our most recent desert test campaign, completed June 2, 2014. Our preliminary contrast measurement is similar to 1x10(-8), consistent with our previous result for the same 60 cm starshade. These data were collected with a 50% spectral bandpass, using a white-light LED as an incoherent light source, in a challenging outdoor test environment. Additional analysis may improve the calculated contrast and/or provide additional improvements to our test configuration, which is currently limited by a halo around the starshade, presumably caused by dust scatter in the atmosphere. The spectral coverage is limited only by the optics and detector in our test setup, not by the starshade itself. Our experimental setup is designed to provide starshade to telescope separation and telescope aperture size that are scaled as closely as possible to the canonical flight system. In this paper we describe key improvements to our test configuration and our latest results with the Hypergaussian starshade. Plans for the next phase of ground testing under a 2013 NASA TDEM award are discussed. |
英文关键词 | exoplanets starshade diffraction occulter field test |
来源出版物 | SPACE TELESCOPES AND INSTRUMENTATION 2014: OPTICAL, INFRARED, AND MILLIMETER WAVE |
ISSN | 0277-786X |
出版年 | 2014 |
卷号 | 9143 |
EISBN | 978-0-8194-9611-9 |
出版者 | SPIE-INT SOC OPTICAL ENGINEERING |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | USA |
收录类别 | CPCI-S |
WOS记录号 | WOS:000354526800082 |
WOS类目 | Astronomy & Astrophysics ; Instruments & Instrumentation ; Optics |
WOS研究方向 | Astronomy & Astrophysics ; Instruments & Instrumentation ; Optics |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/303080 |
作者单位 | Northrop Grumman Aerosp Syst, Redondo Beach, CA 90278 USA |
推荐引用方式 GB/T 7714 | Glassman, Tiffany,Casement, Suzanne,Warwick, Steve,et al. Measurements of High-Contrast Starshade Performance[C]:SPIE-INT SOC OPTICAL ENGINEERING,2014. |
条目包含的文件 | 条目无相关文件。 |
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