@article{c175b1bf68c54ebe815a211fed3c9986,
title = "In-flight performance of the Canadian Astro-H Metrology System",
abstract = "The Canadian Astro-H Metrology System (CAMS) on the Hitomi x-ray satellite is a laser alignment system that measures the lateral displacement (X/Y) of the extensible optical bench (EOB) along the optical axis of the hard x-ray telescopes (HXTs). The CAMS consists of two identical units that together can be used to discern translation and rotation of the deployable element along the axis. This paper presents the results of in-flight usage of the CAMS during deployment of the EOB and during two observations (Crab and G21.5-0.9) with the HXTs. The CAMS was extremely important during the deployment operation by providing real-time positioning information of the EOB with micrometer-scale resolution. We show how the CAMS improves data quality coming from the hard x-ray imagers. Moreover, we demonstrate that a metrology system is even more important as the angular resolution of the telescope increases. Such a metrology system will be an indispensable tool for future high-resolution x-ray imaging missions.",
keywords = "Canadian Astro-H Metrology System, Hitomi (Astro-H), lasers, metrology system, optics, telescope alignment",
author = "Gallo, {Luigi C.} and Alexander Koujelev and St{\'e}phane Gagnon and Timothy Elgin and Martin Guibert and Ryo Iizuka and Manabu Ishida and Kosei Ishimura and Naoko Iwata and Taro Kawano and Casey Lambert and Franco Moroso and Shiro Ueno and Takayuki Yuasa",
note = "Funding Information: The authors are grateful to the entire CAMS team at the Canadian Space Agency and Neptec Design Group for their dedication to the project. We are also thankful to the JAXA team for their help in developing the CAMS. Thanks to Hans Krimm and Lorella Angelini for incorporating the CAMS correction into the pipeline. We are very appreciative to Professor Tadayuki Takahashi for his patience and leadership. LCG acknowledges funding from the Canadian Space Agency. The authors have no conflicts of interest to disclose. Funding Information: Commissioning uplinks and downlinks were also supported by Santiago Space Center (SNT). Publisher Copyright: {\textcopyright} 2018 The Authors.",
year = "2018",
month = apr,
day = "1",
doi = "10.1117/1.JATIS.4.2.021405",
language = "English",
volume = "4",
journal = "Journal of Astronomical Telescopes, Instruments, and Systems",
issn = "2329-4124",
publisher = "SPIE",
number = "2",
}