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Absolute, extreme-ultraviolet, solar spectral irradiance monitors

Monitore zur Messung der absoluten, EUV, spektralen Sonnenstrahlung
: Parkinson, W.H.; Smith, P.L.; Schmidtke, G.

Donnelly, R.F.:
Proceedings of the Workshop on the Solar Electromagnetic Radiation Study for Solar Cycle 22
S.332-337 : Lit.
Workshop on the Solar Electromagnetic Radiation Study for Solar Cycle 22 <1992>
Fraunhofer IPM ()
calibration; extreme ultraviolet; extremes Ultraviolett; Hohl-Kathodenlampe; hollow-cathode lamp; Kalibierung; photodiode; satellite spectrometer; Satellitenspektrometer; solar radiation; Sonnenstrahlung

The need for regular, accurate measurements of the spectrally resolved, solar, extreme ultraviolet (EUV) flux is becoming increasingly recognized. Such date are required for fundamental research in astronomy, e.g., in solar physics and in studies of planetary atmospheres and the local interstellar medium, for basic research into physical models of the terrestrial thermosphere, and for operational use in civilian and military space programs where atmospheric drag on spacecraft is a concern. Some in-orbit measurements of the solar irradiance and solar spectral ultraviolet irradiance have been made, planned for, and will continue. For example, SUSIM, the Solar Ultraviolet Spectral Irradiance Monitor on Spacelab I and II and on UARS, is an instrument that measures the solar ultraviolet flux. However, there remains a significant gap in the energy range covered by solar spectral irradiance measurements: the solar EUV flux, the very-variable and principal source of energy for the upper atmosp here, must be measured regularly and accurately in order to understand and interpret correctyl solar variabilit