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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/933

Title: LYRA: The solar UV radiometer aboard the ESA Proba-2
Authors: Hochedez, J.-F.
Schmutz, W.
Stockman, Y.
Schühle, U.
BenMoussa, A.
Koller, S.
Berghmans, D.
Defise, J.-M.
Halain, J.-P.
Theissen, A.
Delouille, V.
Slemzin, V.
Gillotay, D.
Fussen, D.
Dominique, M.
Vanhellemont, F.
McMullin, D.
Kretzschmar, M.
Mitrofanov, A.
Nicula, B.
Wauters, L.
Roth, H.
Rozanov, E.
Ruëdi, I.
Wehrli, C.
Amano, A.
Van der Linden, R.
Zhukov, A.
Clette, F.
Koizumi, S.
MORTET, Vincent
REMES, Zdenek
Rochus, P.
Issue Date: 2006
Publisher: Elsevier
Citation: Advances in Space Research, 37(2). p. 303-312
Abstract: LYRA is the solar UV radiometer that will embark in 2006 aboard Proba{2, a tech- nologically oriented ESA micro-mission. LYRA is designed and manufactured by a Belgian{Swiss{German consortium (ROB, PMOD/WRC, IMOMEC, CSL, MPS & BISA) with additional international collaborations. It will monitor the solar irra- diance in 4 UV passbands. The channels have been chosen for their relevance to Solar Physics, Aeronomy, and Space Weather: 1/ 115-125 nm (Lyman{®), 2/ the 200{220 nm Herzberg continuum range, 3/ Aluminium ¯lter channel (17{30 nm) including He II at 30.4 nm, and 4/ Zirconium ¯lter channel (1{20 nm). The ra- diometric calibration will be traceable to synchrotron source standards (PTB & NIST), and the stability will be monitored by on-board calibration sources (VIS & NUV LEDs). These allow to distinguish between possible degradations of the detectors and ¯lters. Additionally, a redundancy strategy maximizes the accuracy and the stability of the measurements. LYRA will bene¯t from wide bandgap de- tectors based on diamond: it will be the ¯rst space assessment of a pioneering UV detectors program. Diamond sensors make the instruments radiation-hard and solar-blind: their high bandgap energy makes them insensitive to visible light and, thus, make dispensable visible light blocking ¯lters, which seriously attenuate the desired ultraviolet signal. Their elimination augments the e®ective area, and hence the signal-to-noise, therefore increasing the precision and the cadence. The SWAP EUV imaging telescope will operate next to LYRA on Proba{2. Together, they will establish a high performance solar monitor for operational space weather nowcast- ing and research. LYRA demonstrates technologies important for future missions such as the ESA Solar Orbiter
URI: http://hdl.handle.net/1942/933
DOI: 10.1016/j.asr.2005.10.041
ISI #: 000237214900015
Category: A1
Type: Journal Contribution
Validation: ecoom, 2007
Appears in Collections: Research publications

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