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Overview of PLATO's cameras on-ground and in-orbit calibration and characterisation

Pertenais, Martin and Cabrera Perez, Juan and Griessbach, Denis and Erikson, Anders and Vandenbussche, Bart and Samadi, R and Reese, D. and Rauer, Heike (2021) Overview of PLATO's cameras on-ground and in-orbit calibration and characterisation. In: Proceedings of SPIE - The International Society for Optical Engineering, 11852, 97 - 109. SPIE. International Conference on Space Optics — ICSO 2020, Virtual. doi: 10.1117/12.2599149. ISSN 0277-786X.

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Official URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11852/2599149/Overview-of-PLATOs-cameras-on-ground-and-in-orbit-calibration/10.1117/12.2599149.full?SSO=1


The PLAnetary Transits and Oscillations of stars mission (PLATO) is the M3 mission in ESA’s Cosmic Vision 2015-2025 Programme, see Rauer et al. (2014).1 The PLATO mission aims at detecting and characterizing extrasolar planetary systems, including terrestrial exoplanets around bright solar-type stars up to the habitable zone. In order to achieve its scientific objectives, PLATO must perform uninterrupted high precision photometric monitoring of large samples of stars during long periods to detect and characterize planetary transits. The PLATO light curves will also contain information on the seismic activity of the stars, which can help to constrain mass, radii and ages of the exoplanet host stars. The scientific payload of PLATO, developed and provided by the PLATO Mission Consortium (PMC) and ESA, is based on a multi-telescope configuration consisting of 24 Normal Cameras (N-CAM) and 2 Fast Cameras (F-CAM), so as to provide simultaneously a large field of view and a large collecting aperture. The optical design is identical for all cameras and consists of a 6-lens dioptric design with a 120 mm entrance pupil and an effective field of view of more than 1000 deg2. The calibration and characterization of PLATO’s cameras is a real challenge, especially in terms of quantities: there are 26 Flight Models + 3 Flight Spares + 2 Qualification Models and finally 1 Engineering Model to calibrate. In this context, the on-ground calibration and characterization plan of the cameras was optimized, meaning that all the measurements that can be performed in-orbit will not be calibrated on-ground. Our aim is to give an overview of the on-ground activities planned in the coming years to calibrate and characterize PLATO’s cameras. In particular, a detailed description of the geometric calibration used for the Fine Guidance System (FGS) and the focusing calibration will be given. A description of the in-flight calibration plan will then be presented to get the full overview of the calibration and characterization of PLATO’s cameras. Calibrating so many cameras in space, without any calibration targets/sources on board, only using pointing capabilities of the satellite, stellar targets and advanced data processing is a key aspect for this mission.

Item URL in elib:https://elib.dlr.de/145118/
Document Type:Conference or Workshop Item (Speech)
Title:Overview of PLATO's cameras on-ground and in-orbit calibration and characterisation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Cabrera Perez, JuanUNSPECIFIEDhttps://orcid.org/0000-0001-6653-5487UNSPECIFIED
Vandenbussche, BartKU Leuven (Belgium)UNSPECIFIEDUNSPECIFIED
Reese, D.LESIA, Observatoire de Paris, Universite PSL, CNRS, Sorbonne Universite, Univ. Paris Diderot, Sorbonne Paris Cite, 5 Place Jules Janssen, 92195, Meudon, FranceUNSPECIFIEDUNSPECIFIED
Rauer, HeikeUNSPECIFIEDhttps://orcid.org/0000-0002-6510-1828UNSPECIFIED
Date:June 2021
Journal or Publication Title:Proceedings of SPIE - The International Society for Optical Engineering
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:97 - 109
Keywords:PLATO, exoplanet, optical calibration, in-orbit calibration, AIT, AIV
Event Title:International Conference on Space Optics — ICSO 2020
Event Location:Virtual
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project PLATO - PMC and Science, R - Project Space weather research
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems
Institute of Optical Sensor Systems > Space Instruments
Institute of Planetary Research > Extrasolar Planets and Atmospheres
Institute of Planetary Research > Leitungsbereich PF
Deposited By: Pertenais, Martin
Deposited On:03 Nov 2021 13:38
Last Modified:03 Nov 2021 13:38

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