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Proceedings Paper

Virtis-H: an infrared spectrometer for the Rosetta mission -- calibration results
Author(s): Jean-Michel Reess; Pierre Drossart; Alain Semery; Marc Bouye; Olivier Dupuis; Yann Hello; Gerard Huntzinger; Driss Kouach; J. Parisot; Didier Tiphene; J. Romon; Y. Ghomchi; Jean-Pierre Bibring; G. Bonello; S. Erard; B. Gondet; Yves Langevin; Alain Soufflot; Angioletta Coradini; Fabrizio Capaccioni; Enrico Suetta; Michele Dami; A. Cisbani; C. Pasqui; I. Ficai Veltroni; Gabriele Arnold; Johann Benkhoff; G. Peters
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Paper Abstract

Virtis-H is the high spectral resolution channel of the visible and infrared imaging spectrometer VIRTIS, an instrument of the ESA/ROSETTA mission devoted to the in-orbit remote sensing study of the comet P/46 Wirtanen. After successful tests and calibration, the flight model has been delivered to the European Space Agency for integration on the satellite before the launch foreseen in January 2003. The Virtis-H channel is a cross-dispersion spectrometer in the spectral range 2-5um with a resolution between 1200 and 3000. Its design consists in an afocal telescope-collimator off-axis parabola mirrors, a prism-grating system performing the cross-dispersion, and a three-lens objective imaging the entrance slit on a 436x270 HgCdTe array from Raytheon/IRCOE. At each recorded image, a full spectrum of the observed scene is reconstructed allowing the study of the fine spectral details of the coma and the cometary nucleus. The calibration have shown the fully compliance of the instrument performances with the simulations in terms of spectral resolution, radiometric accuracy and sensibility. For example, spectra of gas, water ice and mineral powders have been measured with Virtis-H showing either its ability to resolve fine spectral lines but also its sensitivity to low fluxes; furthermore, measurements on a 250K blackbody shows its sensibility to relative temperature variation lower than 0.5oC..

Paper Details

Date Published: 18 December 2002
PDF: 9 pages
Proc. SPIE 4818, Infrared Spaceborne Remote Sensing X, (18 December 2002); doi: 10.1117/12.450813
Show Author Affiliations
Jean-Michel Reess, Observatoire de Paris-Meudon (France)
Pierre Drossart, Observatoire de Paris-Meudon (France)
Alain Semery, Observatoire de Paris-Meudon (France)
Marc Bouye, Observatoire de Paris-Meudon (France)
Olivier Dupuis, Observatoire de Paris-Meudon (France)
Yann Hello, Observatoire de Paris-Meudon (France)
Gerard Huntzinger, Observatoire de Paris-Meudon (France)
Driss Kouach, Observatoire de Paris-Meudon (France)
J. Parisot, Observatoire de Paris-Meudon (France)
Didier Tiphene, Observatoire de Paris-Meudon (France)
J. Romon, Observatoire de Paris-Meudon (France)
Y. Ghomchi, Observatoire de Paris-Meudon (France)
Jean-Pierre Bibring, Institut d'Astrophysique Spatiale (France)
G. Bonello, Institut d'Astrophysique Spatiale (France)
S. Erard, Institut d'Astrophysique Spatiale (France)
B. Gondet, Institut d'Astrophysique Spatiale (France)
Yves Langevin, Institut d'Astrophysique Spatiale (France)
Alain Soufflot, Institut d'Astrophysique Spatiale (France)
Angioletta Coradini, Instituto di Astrofisica Spaziale (Italy)
Fabrizio Capaccioni, Instituto di Astrofisica Spaziale (Italy)
Enrico Suetta, Officine Galileo (Italy)
Michele Dami, Officine Galileo (Italy)
A. Cisbani, Officine Galileo (Italy)
C. Pasqui, Officine Galileo (Italy)
I. Ficai Veltroni, Officine Galileo (Italy)
Gabriele Arnold, DLR (Germany)
Johann Benkhoff, DLR (Germany)
G. Peters, DLR (Germany)


Published in SPIE Proceedings Vol. 4818:
Infrared Spaceborne Remote Sensing X
Marija Strojnik; Bjorn F. Andresen, Editor(s)

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