Solar Physics

, Volume 286, Issue 1, pp 289–301 | Cite as

Detection of Solar Rotational Variability in the Large Yield RAdiometer (LYRA) 190 – 222 nm Spectral Band

  • A. V. Shapiro
  • A. I. Shapiro
  • M. Dominique
  • I. E. Dammasch
  • C. Wehrli
  • E. Rozanov
  • W. Schmutz
PROBA2 – FIRST TWO YEARS OF SOLAR OBSERVATION

Abstract

We analyze the variability of the spectral solar irradiance during the period from 7 January 2010 until 20 January 2010 as measured by the Herzberg channel (190 – 222 nm) of the Large Yield RAdiometer (LYRA) onboard PROBA2. In this period of time, observations by the LYRA nominal unit experienced degradation and the signal produced by the Herzberg channel frequently jumped from one level to another. Both factors significantly complicate the analysis. We present the algorithm that allowed us to extract the solar variability from the LYRA data and compare the results with SORCE/SOLSTICE measurements and with modeling based on the Code for the Solar Irradiance (COSI).

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • A. V. Shapiro
    • 1
    • 2
  • A. I. Shapiro
    • 1
  • M. Dominique
    • 3
  • I. E. Dammasch
    • 3
  • C. Wehrli
    • 1
  • E. Rozanov
    • 1
    • 2
  • W. Schmutz
    • 1
  1. 1.Physikalisch-Meteorologishes Observatorium DavosWorld Radiation CenterDavos DorfSwitzerland
  2. 2.Institute for Atmospheric and Climate Science ETHZurichSwitzerland
  3. 3.Royal Observatory of BelgiumBrusselsBelgium

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