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Title: | LYRA: The solar UV radiometer aboard the ESA Proba-2 | Authors: | Hochedez, J.-F. Schmutz, W. NESLADEK, Milos Stockman, Y. Schühle, U. BenMoussa, A. Koller, S. HAENEN, Ken 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 PETERSEN, Rainer D'OLIESLAEGER, Marc ROGGEN, Jean Rochus, P. |
Issue Date: | 2006 | Publisher: | Elsevier | Source: | 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 | Keywords: | Reliability of electronic components;Wide Band Gap Materials | Document URI: | http://hdl.handle.net/1942/933 | DOI: | 10.1016/j.asr.2005.10.041 | ISI #: | 000237214900015 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2007 |
Appears in Collections: | Research publications |
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701. Adv. in space Res. Hochedez.pdf | 388.04 kB | Adobe PDF | View/Open |
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