Cassini VIMS observations of the Galilean satellites including the VIMS calibration procedure

T. B. McCord, A. Coradini, C. A. Hibbitts, F. Capaccioni, G. B. Hansen, G. Filacchione, R. N. Clark, P. Cerroni, R. H. Brown, K. H. Baines, G. Bellucci, J. P. Bibring, B. J. Buratti, E. Bussoletti, M. Combes, D. P. Cruikshank, P. Drossart, V. Formisano, R. Jaumann, Y. LangevinD. L. Matson, R. M. Nelson, P. D. Nicholson, B. Sicardy, C. Sotin

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

The Visual and Infrared Mapping Spectrometer (VIMS) observed the Galilean satellites during the Cassini spacecraft's 2000/2001 flyby of Jupiter, providing compositional and thermal information about their surfaces. The Cassini spacecraft approached the jovian system no closer than about 126 Jupiter radii, about 9 million kilometers, at a phase angle of < 90 °, resulting in only sub-pixel observations by VIMS of the Galilean satellites. Nevertheless, most of the spectral features discovered by the Near Infrared Mapping Spectrometer (NIMS) aboard the Galileo spacecraft during more than four years of observations have been identified in the VIMS data analyzed so far, including a possible 13C absorption. In addition, VIMS made observations in the visible part of the spectrum and at several new phase angles for all the Galilean satellites and the calculated phase functions are presented. In the process of analyzing these data, the VIMS radiometric and spectral calibrations were better determined in preparation for entry into the Saturn system. Treatment of these data is presented as an example of the VIMS data reduction, calibration and analysis process and a detailed explanation is given of the calibration process applied to the Jupiter data.

Original languageEnglish (US)
Pages (from-to)104-126
Number of pages23
JournalIcarus
Volume172
Issue number1 SPEC.ISS.
DOIs
StatePublished - Nov 2004

Keywords

  • Galilean satellites
  • Jupiter system
  • Satellite surfaces
  • Satellites
  • Space mission
  • Surface composition

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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