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Institutes Royal Observatory of Belgium (Brussels, BE)

LYRA the Large Yield RAdiometer. 1/3 Introduction. PRODEX. Measurement: Solar irradiance in four UV to XUV channels: “Herzberg”, “Lyman-alpha”, “Aluminum”, “Zirconium” Science: Solar flares, space weather services, aeronomy (atmospheric occultations & input to climate models)

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Institutes Royal Observatory of Belgium (Brussels, BE)

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  1. LYRAthe Large Yield RAdiometer 1/3Introduction PRODEX • Measurement: Solar irradiance in four UV to XUV channels:“Herzberg”, “Lyman-alpha”, “Aluminum”, “Zirconium” • Science:Solar flares, space weather services, aeronomy (atmospheric occultations & input to climate models) • Technological First: diamond UV detectors for astrophysics • And also:high cadence (> 20Hz), 3 redundant units, 24 LEDs, synchrotron calibration Exploded view of one of the 3 identical LYRA units A diamond detector Calibrating LYRA at the Berlin synchrotron Institutes • Royal Observatory of Belgium (Brussels, BE) • Principal Investigator, overall design, onboard software specification, science operations • PMOD/WRC (Davos, CH) • Lead Co-Investigator, overall design and manufacture • Centre Spatial de Liège (BE) • Lead institute, project management, filters • IMOMEC (Hasselt, BE) • Diamond detectors • Max-Planck-Institut für Sonnensystemforschung (Lindau DE) • Calibration • science Co-Is: BISA (Brussels, BE), LPC2E (Orléans, FR)… LYRA integrated on PROBA2

  2. LYRAthe Large Yield Radiometer 2/3First Light & lunar eclipse • 2 Nov. 2009: PROBA2 launch • 16 Nov. 2009: 1st LYRA “Switch On” • Dec. 2009: dark and LED data • 5 & 6 Jan. 2010: unlock all 3 covers • 6 Jan. 2010: First Light for all 3 units • All 12 channels work. • 11 Jan. 2010: LYRA 1st flare • 15 Jan. 2010: lunar eclipse The ‘South Atlantic Anomaly’ perturbing only LYRA silicon detectors, not diamond  LYRA with Unit 2 opened solar flares Regular terrestrial occultations (eclipse season in Jan. 2010) Lunar eclipse of Jan. 15th Blow-up on the data (all 4 channels) during the lunar eclipse of 15 Jan. 2010. The Sun is less homogeneous in XUV than in UV! 14 Jan 2010 18 Jan 2010 4 days of LYRA data in its EUV channels

  3. LYRAthe Large Yield Radiometer 3/3First results M1.8 flare of 20/01/2010 10:48 by LYRA and GOES Successive sunsets and sunrises for all four channels (17 Jan. 2010) ~120 km ~360 km ~160 km ~410 km ~120 km ~220 km Onset of the flare Peak of the flare EUV fluxes (LYRA) grow faster than X-Rays (GOES) EUV fluxes (LYRA) peak after X-Rays (GOES) Earth Scientists will make useful and exciting science with LYRA data

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