CoRoT Satellite: Analysis of the In-Orbit CCD Dark Current Degradation

Author

Gilard, Olivier ; Boatella-Polo, Cesar ; Dolado-Perez, Juan-Carlos ; Auvergne, Michel ; Quadri, Gianandrea ; Boutillier, Mathieu

Author_Institution

French Space Agency CNES, Toulouse, France

Volume

57

Issue

3

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1644

Lastpage

1653

Abstract

This paper presents the analysis of the CoRoT CCDs dark current degradation measured during more than 2.5 years in orbit. Starting from on-ground irradiation results obtained during the space qualification of the detectors, a model is proposed to calculate the in-orbit pixel dark current distribution (including the hot pixels one). The modeling results are found to be in good agreement with the in-flight data. We therefore use this model to extrapolate the evolution of the dark signal distribution beyond 2.5 years. This is of primary interest in the context of a mission duration extension to 6 years proposed for the CoRoT mission.

Keywords

artificial satellites; charge-coupled devices; CoRoT satellite; dark signal distribution; in-orbit CCD dark current degradation; on-ground irradiation; Charge coupled devices; Current measurement; Dark current; Degradation; Detectors; Extraterrestrial measurements; Image storage; Optical noise; Qualifications; Satellites; CCD; CoRoT; DSNU; dark current; hot pixels;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2010.2044048

Filename

5485118