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LYRA Instrumental Effects

LYRA Instrumental Effects. T. Katsiyannis & M. Dominique on behalf of the LYRA team. Instrument Brief Description. Three redundant Units Four broad-band channels in each Unit Three types of detectors: Standard Silicon (Si) Diamond MSM Diamond PIN. Calibration of LYRA data.

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LYRA Instrumental Effects

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  1. LYRA Instrumental Effects T. Katsiyannis & M. Dominique on behalf of the LYRA team

  2. Instrument Brief Description • Three redundant Units • Four broad-band channels in each Unit • Three types of detectors: • Standard Silicon (Si) • Diamond MSM • Diamond PIN

  3. Calibration of LYRA data • Dark Current Subtraction • Correction of degradation by adding a constant • Conversion from counts to W/m2 (and rescaling to 1 AU) • Flat-field corrections soon to be included

  4. Comparison to GOES data • Linear two-parameters scaling: 0,015*[ch3-min(ch3)] + min(GOES) 0,018*[ch4-min(ch4)] + min(GOES) • http://proba2.oma.be • http://solwww.oma.be/users/dammasch/GoesVsLyra.html

  5. LYRA Degradation • Reasons for Degradation: • Filter Contamination Layer • Space Ageing

  6. Non-Solar Features • Large Angle Rotations • South Atlantic Anomaly • Spacecraft Jitter • Occultations (mid Oct – mid Feb) • Aurora Pertubations (Kp > 3, affects Al & Zr channels)

  7. Main Fields of Scientific Work • Solar Flares (Ly-α, Multi-wavelength, short timescale, quasi-periodic pulsations) • Variability of Long-term Solar Spectral Irradiance • Sun – Moon Eclipses • Occultations • Degradation process and ageing • Performance of Wide-Bandgap detectors

  8. Mission Status • Funded until end of 2014 by ESA Science Directorate & SSA • Topical Issue Released in early 2013 • Forth Call of Guest Investigation Programme this Summer • http://proba2.oma.be

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