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Institutes Royal Observatory of Belgium (Brussels, BE)

LYRA is a cutting-edge instrument measuring solar irradiance in UV to XUV channels for studying solar flares, space weather services, aeronomy, and more. Using diamond UV detectors, LYRA provides high cadence data and precise calibrations. Collaborating institutes include Royal Observatory of Belgium, PMOD/WRC, and Max-Planck-Institut für Sonnensystemforschung. LYRA's first light was in 2009, capturing lunar eclipse and solar flares. Initial results show LYRA's effectiveness in monitoring solar activities.

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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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