| タイトル | Design of a Day/Night Star Camera System |
| 著者（英） | Alexander, Cheryl; Swift, Wesley; Ghosh, Kajal; Ramsey, Brian |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 1999-01-01
1999 |
| 言語 | eng |
| 内容記述 | This paper describes the design of a camera system capable of acquiring stars during both the day and night cycles of a high altitude balloon flight (35-42 km). The camera system will be filtered to operate in the R band (590-810 nm). Simulations have been run using MODTRAN atmospheric code to determine the worse case sky brightness at 35 km. With a daytime sky brightness of 2(exp -05) W/sq cm/str/um in the R band, the sensitivity of the camera system will allow acquisition of at least 1-2 stars/sq degree at star magnitude limits of 8.25-9.00. The system will have an F2.8, 64.3 mm diameter lens and a 1340X1037 CCD array digitized to 12 bits. The CCD array is comprised of 6.8 X 6.8 micron pixels with a well depth of 45,000 electrons and a quantum efficiency of 0.525 at 700 nm. The camera's field of view will be 6.33 sq degree and provide attitude knowledge to 8 arcsec or better. A test flight of the system is scheduled for fall 1999. |
| NASA分類 | Instrumentation and Photography |
| 権利 | Copyright |
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