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На этой странице приведены все страницы, которые ссылаются на http://www.stsci.edu/instruments/observatory/focus/ephem.html. Показаны документы 1 - 1 из 1.
1. HST Focus Monitoring
... Focus ? ... HST's Optical Telescope Assembly (OTA) refers to the primary and secondary mirrors, and the truss structure supporting them. ... Conventions: In this document, we express all focus changes in the SI-independent units of secondary mirror microns. ... Desorption compensating Secondary Mirror moves are made when we determine a focus state of -1.5 microns based on fitting measured PC focus points, again ensuring 1 sigma variations stay within the adopted tolerance. ...
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Ссылки http://www.stsci.edu/instruments/observatory/focus/focus2.html -- 12.8 Кб -- 25.08.2003
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