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Astrophysical: Solar constant

  • Publication
    Ground-based measurements of solar intensity oscillations

    Ground-based multichannel photometry of integral sunlight has been obtained at Izaña (Tenerife) during three months in 1984 with a photometer built at ESTEC...

  • Publication
    Luminosity Oscillations Imager (LOI)

    The small imaging photometer of the VIRGO (Variability in IRradiance and Gravity Oscillations) investigation on ESA's SOHO mission is presented. This instrument...

  • Publication
    VIRGO: The solar monitor experiment on SOHO

    The VIRGO Experiment (Variability of solar IRradiance and Gravity Oscillations) contains two types of active cavity radiometers for monitoring of the solar...