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Proceedings Paper

Photometric calibrations of the AFP-675 far-ultraviolet cameras experiment
Author(s): George R. Carruthers; Brian C. Dohne; Kevin K. Shephard; Susan A. Christe Reeb; Edward G. Schmidt
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Paper Abstract

The far ultraviolet cameras experiment (NRL-803), part of the U.S. Air Force Space Test Program's AFP-675 payload, flew aboard the space shuttle Discovery in April - May 1991 (STS-39). While in orbit, the experiment gathered data about sources of far-ultraviolet radiation in near-Earth and distant space. To obtain quantitative information from the data, pre-flight and post-flight calibrations of the flight instruments were required. Calibrations were performed using a vacuum-UV optical collimator and two types of light sources: (a) a vacuum-UV monochromator, whose output wavelength could be varied over the wavelength range 105 - 200 nm; and (b) gas discharge tubes with interference-filter windows, giving monochromatic output at selected wavelengths within this range. Calibrations were of two types (the first performed only before flight): (a) using the far UV cameras as photodiodes; and (b) using the cameras to record images on film, as during flight. In addition, in-flight calibrations are obtained from observations of hot stars or other sources which have been measured by previous space experiments. Results from the calibrations are used to derive absolute far-UV brightnesses of objects from the actual flight data.

Paper Details

Date Published: 14 September 1994
PDF: 18 pages
Proc. SPIE 2282, Ultraviolet Technology V, (14 September 1994); doi: 10.1117/12.186612
Show Author Affiliations
George R. Carruthers, Naval Research Lab. (United States)
Brian C. Dohne, Naval Research Lab. (United States)
Kevin K. Shephard, Naval Research Lab. (United States)
Susan A. Christe Reeb, Univ. of Maryland/Baltimore County (United States)
Edward G. Schmidt, National Science Foundation (United States)

Published in SPIE Proceedings Vol. 2282:
Ultraviolet Technology V
Robert E. Huffman; Christos G. Stergis, Editor(s)

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