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Proceedings Paper

The Photoelectric Spectroheliometer On ATM
Author(s): E. M. Reeves; J. G. Timothy; M. C. E. Huber
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Paper Abstract

The Harvard College Observatory instrument on the Apollo Telescope Mount (ATM) is a photoelectric spectroheliometer designed to obtain up to seven simultaneouA spectrohRliograms in the range 280 Å to 1340 Å with a spatial resolution of 5 arc sec as well as spectral scans with a resolution of 1.6 Å over the same wavelength range. Because of its large size, this in-strument has a sensitivity far greater than that of any photoelectric extreme ultraviolet (EUV) spectroheliometer flown to date. The instrument has operated correctly since 29 May 1973 and has obtained many thousands of spatial and spectral scans of a variety of solar features. Furthermore, the laboratory photometric calibration has been reestablished in orbit by comparing the response with that of more recently calibrated spectroheliometers flown on sounding rockets in August and December 1973.

Paper Details

Date Published: 1 September 1974
PDF: 16 pages
Proc. SPIE 0044, Instrumentation in Astronomy II, (1 September 1974); doi: 10.1117/12.953940
Show Author Affiliations
E. M. Reeves, Center for Astrophysics (United States)
J. G. Timothy, Harvard College Observatory (United States)
M. C. E. Huber, Smithsonian Astrophysical Observatory (United States)

Published in SPIE Proceedings Vol. 0044:
Instrumentation in Astronomy II
Lewis Larmore; Donald H. Menzel; David Crawford, Editor(s)

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