Scientific assessment of the quality of OSIRIS images
Journal
Date Issued
2015
Author(s)
•
Güttler, C.
•
Kovacs, G.
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Bertini, I.
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Bodewits, D.
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Fornasier, S.
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Lara, L.
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La Forgia, F.
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Magrin, S.
•
•
Sierks, H.
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Barbieri, C.
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Lamy, P. L.
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Rodrigo, R.
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Koschny, D.
•
Rickman, H.
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Keller, H. U.
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Agarwal, J.
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A'Hearn, M. F.
•
Barucci, M. A.
•
Bertaux, J. -L.
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Besse, S.
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Boudreault, S.
•
•
Da Deppo, V.
•
Davidsson, B.
•
Debei, S.
•
De Cecco, M.
•
El-Maarry, M. R.
•
•
Groussin, O.
•
Gutiérrez-Marques, P.
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Gutiérrez, P. J.
•
Hoekzema, N.
•
Hofmann, M.
•
Hviid, S. F.
•
Ip, W. -H.
•
Jorda, L.
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Knollenberg, J.
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Kramm, J. -R.
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Kührt, E.
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Küppers, M.
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Lazzarin, M.
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Lopez Moreno, J. J.
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Marzari, F.
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Massironi, M.
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Michalik, H.
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Moissl, R.
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Naletto, G.
•
Oklay, N.
•
Scholten, F.
•
Shi, X.
•
Thomas, N.
•
Vincent, J. -B.
Description
OSIRIS was built by a consortium led by the Max-Planck-Institut für Sonnensystemforschung, Göttingen, Germany, in collaboration with CISAS, University of Padova, Italy, the Laboratoire d’Astrophysique de Marseille, France, the Instituto de Astrofísica de Andalucia, CSIC, Granada, Spain, the Scientific Support Office of the European Space Agency, Noordwijk, The Netherlands, the Instituto Nacional de Técnica Aeroespacial, Madrid, Spain, the Universidad Politéchnica de Madrid, Spain, the Department of Physics and Astronomy of Uppsala University, Sweden, and the Institut für Datentechnik und Kommunikationsnetze der Technischen Universität Braunschweig, Germany. The support of the national funding agencies of Germany (DLR), France (CNES), Italy (ASI), Spain (MEC), Sweden (SNSB), and the ESA Technical Directorate is gratefully acknowledged. We thank the Rosetta Science Ground Segment at ESAC, the Rosetta Mission Operations Centre at ESOC and the Rosetta Project at ESTEC for their outstanding work enabling the science return of the Rosetta Mission.
Abstract
Context. OSIRIS, the scientific imaging system onboard the ESA Rosetta spacecraft, has been imaging the nucleus of comet 67P/Churyumov-Gerasimenko and its dust and gas environment since March 2014. The images serve different scientific goals, from morphology and composition studies of the nucleus surface, to the motion and trajectories of dust grains, the general structure of the dust coma, the morphology and intensity of jets, gas distribution, mass loss, and dust and gas production rates. Aims: We present the calibration of the raw images taken by OSIRIS and address the accuracy that we can expect in our scientific results based on the accuracy of the calibration steps that we have performed. Methods: We describe the pipeline that has been developed to automatically calibrate the OSIRIS images. Through a series of steps, radiometrically calibrated and distortion corrected images are produced and can be used for scientific studies. Calibration campaigns were run on the ground before launch and throughout the years in flight to determine the parameters that are used to calibrate the images and to verify their evolution with time. We describe how these parameters were determined and we address their accuracy. Results: We provide a guideline to the level of trust that can be put into the various studies performed with OSIRIS images, based on the accuracy of the image calibration.
Volume
583
Start page
A46
Issn Identifier
0004-6361
Ads BibCode
2015A&A...583A..46T
Rights
open.access
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