On-ground characterization of Rosetta/VIRTIS-M. II. Spatial and radiometric calibrations
- INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica (IASF), via del Fosso del Cavaliere, 100, 00133 Rome (Italy)
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{sup -2} {mu}m{sup -1} sterad{sup -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.
- OSTI ID:
- 20861162
- Journal Information:
- Review of Scientific Instruments, Vol. 77, Issue 10; Other Information: DOI: 10.1063/1.2360786; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
Similar Records
Visible/infrared radiometric calibration station
Improved Radiometric Calibrations and Measurements for Evaluating Photovoltaic Devices