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The LYRA Instrument Onboard PROBA2: Description and In-Flight Performance

Abstract

The Large Yield Radiometer (LYRA) is an XUV–EUV–MUV (soft X-ray to mid-ultraviolet) solar radiometer onboard the European Space Agency Project for On-Board Autonomy 2 (PROBA2) mission, which was launched in November 2009. LYRA acquires solar-irradiance measurements at a high cadence (nominally 20 Hz) in four broad spectral channels, from soft X-ray to MUV, which have been chosen for their relevance to solar physics, space weather, and aeronomy. We briefly review the design of the instrument, give an overview of the data products distributed through the instrument website, and describe how the data are calibrated. We also briefly present a summary of the main fields of research currently under investigation by the LYRA consortium.

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Acknowledgements

The authors acknowledge support from the Belgian Federal Science Policy Office through the ESA-PRODEX program. LYRA is a project of the Centre Spatial de Liège, the Physikalisch-Meteorologisches Observatorium Davos, and the Royal Observatory of Belgium, funded by the Belgian Federal Science Policy Offce (BELSPO) and by the Swiss Bundesamt für Bildung und Wissenschaft. The authors greatefully acknowledge this consortium, as well as the whole LYRA team for their investment and motivation. Special thanks to D. McMullin and J. Zender for their pertinent suggestions.

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Correspondence to M. Dominique.

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PROBA2 – First Two Years of Solar Observation

Guest Editors: David Berghmans, Anik De Groof, Marie Dominique, and Jean-François Hochedez

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Dominique, M., Hochedez, JF., Schmutz, W. et al. The LYRA Instrument Onboard PROBA2: Description and In-Flight Performance. Sol Phys 286, 21–42 (2013). https://doi.org/10.1007/s11207-013-0252-5

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Keywords

  • Instrumentation and data management
  • Solar irradiance
  • Flares
  • Earth atmosphere
  • Eclipse observations