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Title:
LYRA, a solar UV radiometer on Proba2
Authors:
Hochedez, J.-F.; Schmutz, W.; Stockman, Y.; Schühle, U.; Benmoussa, A.; Koller, S.; Haenen, K.; 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.; Rüedi, I.; Wehrli, C.; Soltani, A.; Amano, H.; van der Linden, R.; Zhukov, A.; Clette, F.; Koizumi, S.; Mortet, V.; Remes, Z.; Petersen, R.; Nesládek, M.; D'Olieslaeger, M.; Roggen, J.; Rochus, P.
Affiliation:
AA(Royal Observatory of Belgium, Circular Avenue 3, B1180 Brussels, Belgium), AB(Physikalisch-Meteorologisches Observatorium Davos and World Radiation Center, Dorfstrasse 33, CH7260 Davos Dorf, Switzerland), AC(Centre Spatial de Liège, Avenue du Pré Aily, B4031 Angleur, Belgium), AD(Max-Planck-Institut für Sonnensystemforschung, D37191 Katlenburg-Lindau, Germany), AE(Royal Observatory of Belgium, Circular Avenue 3, B1180 Brussels, Belgium), AF(Physikalisch-Meteorologisches Observatorium Davos and World Radiation Center, Dorfstrasse 33, CH7260 Davos Dorf, Switzerland), AG(Institute for Materials Research, Limburgs Universitair Centrum, Wetenschapspark 1, B3590 Diepenbeek, Belgium; IMEC, Division IMOMEC, Wetenschapspark 1, B3590 Diepenbeek, Belgium), AH(Royal Observatory of Belgium, Circular Avenue 3, B1180 Brussels, Belgium), AI(Centre Spatial de Liège, Avenue du Pré Aily, B4031 Angleur, Belgium), AJ(Centre Spatial de Liège, Avenue du Pré Aily, B4031 Angleur, Belgium), AK(Royal Observatory of Belgium, Circular Avenue 3, B1180 Brussels, Belgium), AL(Royal Observatory of Belgium, Circular Avenue 3, B1180 Brussels, Belgium), AM(Lebedev Physical Institute, 53 Leninsky Prospect, Moscow 119991, Russia), AN(Belgian Institute for Space Aeronomy, Circular Avenue 3, B1180 Brussels, Belgium), AO(Belgian Institute for Space Aeronomy, Circular Avenue 3, B1180 Brussels, Belgium), AP(Belgian Institute for Space Aeronomy, Circular Avenue 3, B1180 Brussels, Belgium), AQ(Belgian Institute for Space Aeronomy, Circular Avenue 3, B1180 Brussels, Belgium), AR(Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375, USA), AS(Istituto Fisica dello Spazio Interplanetario, Consiglio Nazionale delle Ricerche, Via del Fosso del Cavaliere 100, I00133 Roma, Italy), AT(Lebedev Physical Institute, 53 Leninsky Prospect, Moscow 119991, Russia), AU(Royal Observatory of Belgium, Circular Avenue 3, B1180 Brussels, Belgium), AV(Royal Observatory of Belgium, Circular Avenue 3, B1180 Brussels, Belgium), AW(Physikalisch-Meteorologisches Observatorium Davos and World Radiation Center, Dorfstrasse 33, CH7260 Davos Dorf, Switzerland), AX(Physikalisch-Meteorologisches Observatorium Davos and World Radiation Center, Dorfstrasse 33, CH7260 Davos Dorf, Switzerland), AY(Physikalisch-Meteorologisches Observatorium Davos and World Radiation Center, Dorfstrasse 33, CH7260 Davos Dorf, Switzerland), AZ(Physikalisch-Meteorologisches Observatorium Davos and World Radiation Center, Dorfstrasse 33, CH7260 Davos Dorf, Switzerland), BA(Institut d'Electronique, de Microélectronique et de Nanotechnologie, F59652 Villeneuve d'Ascq, France), BB(Department of Materials Science and Engineering, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku, Nagoya 468-8502, Japan), BC(Royal Observatory of Belgium, Circular Avenue 3, B1180 Brussels, Belgium), BD(Royal Observatory of Belgium, Circular Avenue 3, B1180 Brussels, Belgium), BE(Royal Observatory of Belgium, Circular Avenue 3, B1180 Brussels, Belgium), BF(Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan), BG(Institute for Materials Research, Limburgs Universitair Centrum, Wetenschapspark 1, B3590 Diepenbeek, Belgium), BH(Institute for Materials Research, Limburgs Universitair Centrum, Wetenschapspark 1, B3590 Diepenbeek, Belgium), BI(IMEC, Division IMOMEC, Wetenschapspark 1, B3590 Diepenbeek, Belgium), BJ(Institute for Materials Research, Limburgs Universitair Centrum, Wetenschapspark 1, B3590 Diepenbeek, Belgium; IMEC, Division IMOMEC, Wetenschapspark 1, B3590 Diepenbeek, Belgium), BK(Institute for Materials Research, Limburgs Universitair Centrum, Wetenschapspark 1, B3590 Diepenbeek, Belgium; IMEC, Division IMOMEC, Wetenschapspark 1, B3590 Diepenbeek, Belgium), BL(IMEC, Kapeldreef 75, B3001 Louvain, Belgium), BM(Centre Spatial de Liège, Avenue du Pré Aily, B4031 Angleur, Belgium)
Publication:
Advances in Space Research, Volume 37, Issue 2, p. 303-312. (AdSpR Homepage)
Publication Date:
00/2006
Origin:
ELSEVIER
PACS Keywords:
Optical properties of bulk materials and thin films, Semiconductors, Elemental semiconductors and insulators, Photodiodes; phototransistors; photoresistors, Physics of the ionosphere, Instrumentation for space plasma physics, ionosphere, and magnetosphere, Environmental effects on instruments, Solar instruments, Photometric, polarimetric, and spectroscopic instrumentation, Time series analysis, time variability, Ultraviolet, Solar electromagnetic emission
DOI:
10.1016/j.asr.2005.10.041
Bibliographic Code:
2006AdSpR..37..303H

Abstract

LYRA is the solar UV radiometer that will embark in 2006 onboard Proba2, a technologically oriented ESA micro-mission. LYRA is designed and manufactured by a Belgian Swiss German consortium (ROB, PMOD/WRC, IMOMEC, CSL, MPS and BISA) with additional international collaborations. It will monitor the solar irradiance in four UV passbands. They have been chosen for their relevance to Solar Physics, Aeronomy and Space Weather: (1) the 115 125 nm Lyman-α channel, (2) the 200 220 nm Herzberg continuum range, (3) the Aluminium filter channel (17 70 nm) including He II at 30.4 nm and (4) the Zirconium filter channel (1 20 nm). The radiometric calibration will be traceable to synchrotron source standards (PTB and NIST). The stability will be monitored by onboard calibration sources (LEDs), which allow to distinguish between potential degradations of the detectors and filters. Additionally, a redundancy strategy maximizes the accuracy and the stability of the measurements. LYRA will benefit from wide bandgap detectors based on diamond: it will be the first 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, therefore, make dispensable visible light blocking filters, which seriously attenuate the desired ultraviolet signal. Their elimination augments the effective 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 Proba2. Together, they will establish a high performance solar monitor for operational space weather nowcasting and research. LYRA demonstrates technologies important for future missions such as the ESA Solar Orbiter.
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