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Solar Spectral Irradiance Variability in November/December 2012

Comparison of Observations by Instruments on the International Space Station and Models
 
: Thuillier, G.; Schmidtke, G.; Erhardt, C.; Nikutowski, B.; Shapiro, AI.; Bolduc, C.; Lean, J.; Krivova, N.; Charbonneau, P.; Cessateur, G.; Haberreiter, M.; Melo, S.; Delouille, V.; Mampaey, B.; Yeo, K.L.; Schmutz, W.

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Solar physics 289 (2014), No.12, pp.4433-4452
ISSN: 0038-0938
ISSN: 1573-093X
English
Journal Article
Fraunhofer IPM ()

Abstract
Onboard the International Space Station (ISS), two instruments are observing the solar spectral irradiance (SSI) at wavelengths from 16 to 2900 nm. Although the ISS platform orientation generally precludes pointing at the Sun more than 10 -aEuro parts per thousand 14 days per month, in November/December 2012 a continuous period of measurements was obtained by implementing an ISS 'bridging' maneuver. This enabled observations to be made of the solar spectral irradiance (SSI) during a complete solar rotation. We present these measurements, which quantify the impact of active regions on SSI, and compare them with data simultaneously gathered from other platforms, and with models of spectral irradiance variability. Our analysis demonstrates that the instruments onboard the ISS have the capability to measure SSI variations consistent with other instruments in space. A comparison among all available SSI measurements during November-December 2012 in absolute units with reconstructions using solar proxies and observed solar activity features is presented and discussed in terms of accuracy.

: http://publica.fraunhofer.de/documents/N-319587.html