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Proceedings Paper

The solar EUV instrumentation onboard the Earth geostationary orbit satellite
Author(s): Fei Wei; Guangwu Zhu; Jilong Peng; Shijin Wang; Huaan Lin
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Paper Abstract

Solar Extreme Ultravoilet (EUV) irradiance is one of the most important energy input source for the upper atmosphere. It's responsible for the variation of the composition of upper atmosphere, vertical profile of the atmosphere density and ionosphere's TEC. In order to investigate the solar EUV irradiance in different time scales, it's better to launch EUV grating spectrograph covering the whole solar EUV spectrum. Because of the high contrast between the solar EUV emission lines, it is possible to characterize the whole solar EUV spectrum by monitoring individual bright EUV emission lines, such as the Lyman alpha emission line (121.6nm in wavelength) and the He-II emission line (30.4nm in wavelength). The solar EUV instruments described in this paper are broad wavelength passband EUV monitors respectively covering the emission lines of 30.4nm and 121.6nm. Additional important emission lines are optional, such as 12.1nm, 58.4nm and 85.6nm. Each instrument covers just one emission line selected by a group of optic components - a multi-metal-film filter selecting the EUV wavelength passband and a spherical multilayer-coated reflecting mirror collecting the solar EUV irradiance from different incidence angle and improving the wavelength resolution. This kind of design will be used in the case high accuracy solar pointing system is unavailable, and the strong background of energetic charged particles is serious, such in the earth geostationary orbit, which is located in the limb of outer radiation belt.

Paper Details

Date Published: 13 October 2008
PDF: 6 pages
Proc. SPIE 7128, Seventh International Symposium on Instrumentation and Control Technology: Measurement Theory and Systems and Aeronautical Equipment, 71282P (13 October 2008); doi: 10.1117/12.807146
Show Author Affiliations
Fei Wei, Ctr. for Space Science and Applied Research (China)
Graduate Univ. of Chinese Academy of Sciences (China)
Guangwu Zhu, Ctr. for Space Science and Applied Research (China)
Jilong Peng, Ctr. for Space Science and Applied Research (China)
Graduate Univ. of Chinese Academy of Sciences (China)
Shijin Wang, Ctr. for Space Science and Applied Research (China)
Huaan Lin, Ctr. for Space Science and Applied Research (China)


Published in SPIE Proceedings Vol. 7128:
Seventh International Symposium on Instrumentation and Control Technology: Measurement Theory and Systems and Aeronautical Equipment

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