13 November 1996 VIRTIS: Visible Infrared Thermal Imaging Spectrometer for the Rosetta mission
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The visible infrared thermal imaging spectrometer (VIRTIS) is one of the principal payloads to be launched in 2003 on ESA's Rosetta spacecraft. Its primary scientific objective s are to map the surface of the comet Wirtanen, monitor its temperature, and identify the solids and gaseous species on the nucleus and in the coma. VIRTIS will also collet data on two asteroids, one of which has been identified as Mimistrobell. The data is collected remotely using a mapping spectrometer co-boresighted with a high spectral resolution spectrometer. The mapper consists of a Shafer telescope matched to an Offner grating spectrometer capable of gathering high spatial, medium spectral resolution image cubes in the 0.25 to 5 micrometers waveband. The high spectral resolution spectrometer uses an echelle grating and a cross dispersing prism to achieve resolving powers of 1200 to 300 in the 1.9 to 5 micrometers band. Both sub-systems are passively cooled to 130 K and use two Sterling cycle coolers to enable two HgCdTe detector arrays to operate at 70 K. The mapper also uses a silicon back-side illuminated detector array to cover the ultra-violet to near-infrared optical band.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Francis M. Reininger, Angioletta Coradini, Fabrizio Capaccioni, M. T. Capria, Priscilla Cerroni, M. C. De Sanctis, G. Magni, Pierre Drossart, Maria A. Barucci, D. Bockelee-Morvan, Jean-Michel Combes, J. Crovisier, T. Encrenaz, Jean-Michel Reess, Alain Semery, Didier Tiphene, Gabriele Arnold, Uri Carsenty, Harald Michaelis, Stefano Mottola, Gerhard Neukum, G. Peters, Ulrich Schade, Fredric W. Taylor, Simon B. Calcutt, Tim Vellacott, P. Venters, R. E.J. Watkins, Giancarlo Bellucci, Vittorio Formisano, Francesco Angrilli, Gianandrea Bianchini, Bortolino Saggin, E. Bussoletti, L. Colangeli, Vito Mennella, S. Fonti, Jean-Pierre Bibring, Yves Langevin, B. Schmitt, M. Combi, U. Fink, Thomas B. McCord, Wing Ip, Robert W. Carlson, Donald E. Jennings, "VIRTIS: Visible Infrared Thermal Imaging Spectrometer for the Rosetta mission", Proc. SPIE 2819, Imaging Spectrometry II, (13 November 1996); doi: 10.1117/12.258082; https://doi.org/10.1117/12.258082


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