On-ground characterization of Rosetta/VIRTIS-M. II. Spatial and radiometric calibrations

Details On-ground characterization of Rosetta/VIRTIS-M. II. Spatial and radiometric calibrations On-ground characterization of Rosetta/VIRTIS-M. II. Spatial and radiometric calibrations

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006rsci...77j3106f&link_type=abstract

Review of Scientific Instruments, Volume 77, Issue 10, pp. 103106-103106-9 (2006).

Computer Science

Performance

5

Spectroscopy And Spectrophotometry, Standards And Calibration, Visible And Ultraviolet Spectrometers, Infrared Spectrometers, Auxiliary Equipment, And Techniques, Charge-Coupled Devices, Image Detectors, And Ir Detector Arrays, Imaging Detectors And Sensors

Scientific paper

After having considered the spectral and geometrical performances of the Rosetta/VIRTIS-M experiment, we complete here the analysis by evaluating quantitatively the flat-field and radiometric responses. The purpose of this work is to retrieve the flat-field matrix necessary to homogenize the focal plane response. Moreover, the most important result is the determination of the instrument transfer function that allows to convert digital numbers in physical units of spectral radiance (W m-2 μm-1 sterad-1). The strategy adopted to organize measurement sequence, a basic description of the on-ground experimental setups and the analysis of the collected data, is included in this article. An analysis of the instrumental stability has been performed as well by examining how the internal calibration data are affected by environmental conditions. These data allow to evaluate the cumulative effects of thermal and vibrational stresses on the instrumental performances: up to now we have verified that this effect is negligible. Finally the basic calibration pipeline used to calibrate in-flight data with on-ground parameters is fully described.

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