Mathematics – Logic
Scientific paper
Aug 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003rsci...74.3796m&link_type=abstract
Review of Scientific Instruments, Volume 74, Issue 8, pp. 3796-3801 (2003).
Mathematics
Logic
8
Visible And Ultraviolet Sources, Infrared Sources, Spaceborne And Space Research Instruments, Apparatus, And Components, Photometric, Polarimetric, And Spectroscopic Instrumentation, Lunar, Planetary, And Deep-Space Probes, Visible And Ultraviolet Spectrometers, Infrared Spectrometers, Auxiliary Equipment, And Techniques, Infrared, Submillimeter Wave, Microwave, And Radiowave Sources
Scientific paper
VIRTIS-M is a visible-infrared (VIS-IR) image spectrometer designed for the Rosetta mission; it intends to provide detailed informations on the physical, chemical, and mineralogical nature of comets and asteroids. The in-flight performances of VIRTIS-M are expected to be influenced by various disturbances, like the initial strong vibrations of the rocket, the long duration of the experiment (from 2003 to 2010), as well as other possible environmental changes; therefore, an in-flight recalibration procedure is mandatory. Quite often in such kinds of missions, a light emission diode (LED) is employed to calibrate the on-board spectrometers by taking advantage of the relative small dimensions, stability, and hardness of these sources. VIRTIS-M is the first image spectrometer that will use a new generation of lamps for internal calibrations. These new lamps are characterized by a wide spectral range with a blackbody-like emission with an effective temperature of about (2400-2600 K), thereby covering the whole VIRTIS-M's spectral range (0.2-5 μm) i.e., they offer the possibility of a wider spectral calibration in comparison with the quasimonochromatic LED emission. A precise spectral calibration is achieved by adding special filters for visible and infrared ranges in front of the window source, containing many narrow absorption lines. In the present article, we describe the calibration and tests of some flight prototypes of these lamps (VIS and IR), realized by the Officine Galileo and calibrated by the Consiglio Nazionale delle Ricerche-Istituto di Astrofisica Spaziale e Fisica Cosmica.
Mazzoni Alberto
Melchiorri Riccardo
Piccioni Giuseppe
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