Abstract
The first results obtained with the Solar EUV Monitor (SEM), part of the Charge, Element, and Isotope Analysis System (CELIAS) instrument, aboard the SOlar and Heliospheric Observatory (SOHO) satellite are presented. The instrument monitors the full-disk absolute value of the solar He II irradiance at 30.4 nm, and the full-disk absolute solar irradiance integrated between 0.1 nm and 77 nm. The SEM was first turned on December 15, 1995 and obtained ‘first light’ on December 16, 1995. At this time the SOHO spacecraft was close to the L-l Lagrange point, 1.5 x 106 km from the Earth towards the Sun. The data obtained by the SEM during the first four and a half months of operation will be presented. Although the period of observation is near solar minimum, the SEM data reveal strong short-term solar irradiance variations in the broad-band, central image channel, which includes solar X-ray emissions.
Paper presented at the SOLERS22 International Workshop, held at the National Solar Observatory, Sacramento Peak, Sunspot, New Mexico, U.S.A., June 17–21, 1996.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Acton, L.: 1996, private communication.
Barth, C. A., Tobiska, W. K., Siskind, D. E., and Cleary, D. D.: 1988, Geophys. Res. Letters 15, 92.
Canfield, L. R.: 1987, Appl. Optics 26, 3831.
Domingo, V.: 1989, in T. D. Guyenne (ed.), ESA SP-1104.
Freeman, F. F. and Jones, B.B.: 1970, Solar Phys. 15, 288.
Furst, M. L., Graves, R. M., Canfield, L. R., and Vest, R. E.: 1995, Rev. Sci. Instrum. 66, 2257.
Holzer, T. E.: 1977, Geophys. Space Phys. 15, 467.
Hovestadt, D., Hilchenbach, M., Biirgi, A., Klecker, B., Laeverenz, P., Scholer, M., Grunwaldt, H, Axford, W. I., Livi, S., Marsch, E., Wilken, B., Winterhoff, H. P., Ipavich, F. M., Bedini, P., Coplan, M. A., Galvin, A. B., Gloeckler, G., Bochsler, P., Balsiger, H., Fischer, J., Geiss, J., Kallenbach, R., Wurz, P., Reiche, K.-U., Gliem, F., Judge, D. L., Ogawa, H. S., Hsieh, K. C., Möbius, E., Lee, M. A., Managadze, G. G., Verigin, M. I., and Neugebauer, M.: 1995, Solar Phys. 162, 441.
Kreplin, R. W. and Horan, D. M.: 1992, in R. F. Donnelly (ed.), Proceedings of the Workshop on the Solar Electromagnetic Radiation Study for Solar Cycle 22, p. 405.
Lean, J.: 1990, J. Geophys. Res. 95(A8), 11933.
Möbius, E., Hovestadt, D., Klecker, B., Scholer, M., Gloeckler, G., and Ipavich, F. ML: 1985, Nature 318, 426.
Ogawa, H. S., McMullin, D. R., Judge, D. L., and Korde, R.: 1993, Optical Eng. 32, 3121.
Richards, P. G. and Torr, D. G.: 1984, J. Geophys. Res. 89, 5625.
Richards, P. G. and Torr, D. G.: 1988, J. Geophys. Res. 93, 4060.
Richards, P. G., Fennelly, J. A., and Torr, D. G.: 1994, J. Geophys. Res. 99, 8981.
Tobiska, W. K.: 1996, private communication.
Van Tassel, R. A., McMahon, W. J., and Héroux, L.: 1981, AFGL-TR-81-0111, Res. pap. 737.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1998 Springer Science+Business Media Dordrecht
About this paper
Cite this paper
Judge, D.L. et al. (1998). First Solar EUV Irradiances Obtained from SOHO by the CELIAS/SEM. In: Pap, J.M., Fröhlich, C., Ulrich, R.K. (eds) Solar Electromagnetic Radiation Study for Solar Cycle 22. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5000-2_12
Download citation
DOI: https://doi.org/10.1007/978-94-011-5000-2_12
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6099-8
Online ISBN: 978-94-011-5000-2
eBook Packages: Springer Book Archive