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Proceedings Paper

Design of a day/night star camera system
Author(s): Cheryl D. Alexander; Wesley R. Swift; Kajal Ghosh; Brian D. Ramsey
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Paper Abstract

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. The camera system will be filtered to operate in the R and I bands, and simulations have been run using MODTRAN atmospheric code to determine the worse case sky brightness at 35k. With a worse case daytime sky brightness of 2 X 10-5/sr/micrometers at 600nm, the sensitivity of the camera system will allow acquisition of at least 1-2 stars/degrees2 at star magnitude limits of 7.8-8.1. The system will have an F2.8, 64.3mm diameter lens and a 1340 X 1037 CCD digitized to 12 bits. The CCD is comprised of 6.8micrometers X 6.8micrometers pixels with a well depth of 45,000 electrons and quantum efficiency of 0.54 at 700nm. The camera's field-of-view will be 6.33 degrees2 and provide attitude knowledge to 8 arcsec or better. A test flight of the system is scheduled for fall 1999.

Paper Details

Date Published: 5 October 1999
PDF: 8 pages
Proc. SPIE 3779, Current Developments in Optical Design and Optical Engineering VIII, (5 October 1999); doi: 10.1117/12.368236
Show Author Affiliations
Cheryl D. Alexander, NASA Marshall Space Flight Ctr. (United States)
Wesley R. Swift, Univ. of Alabama in Huntsville (United States)
Kajal Ghosh, NASA Marshall Space Flight Ctr. (United States)
Brian D. Ramsey, NASA Marshall Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 3779:
Current Developments in Optical Design and Optical Engineering VIII
Robert E. Fischer; Warren J. Smith, Editor(s)

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