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http://hdl.handle.net/20.500.12386/26632
Title: | An afocal telescope configuration for the ESA ARIEL mission | Authors: | Da Deppo, Vania FOCARDI, MAURO Middleton, Kevin MORGANTE, GIANLUCA Pascale, Enzo Grella, Samuele Pace, Emanuele CLAUDI, Riccardo Amiaux, Jérôme Colomé Ferrer, Josep Hunt, Thomas Rataj, Miroslaw Sierra-Roig, Carles Ficai Veltroni, Iacopo Eccleston, Paul MICELA, Giuseppina Tinetti, Giovanna |
Issue Date: | 2017 | Journal: | CEAS SPACE JOURNAL | Number: | 9 | Issue: | 4 | First Page: | 379 | Abstract: | Atmospheric Remote-Sensing Infrared Exoplanet Large Survey (ARIEL) is a candidate as an M4 ESA mission to launch in 2026. During its 3.5 years of scientific operations, ARIEL will observe spectroscopically in the infrared (IR) a large population of known transiting planets in the neighbourhood of the solar system. ARIEL aims to give a breakthrough in the observation of exoplanet atmospheres and understanding of the physics and chemistry of these far-away worlds. ARIEL is based on a 1 m class telescope feeding a collimated beam into two separate instrument modules: a spectrometer module covering the waveband between 1.95 and 7.8 μm and a combined fine guidance system/visible photometer/NIR spectrometer. The telescope configuration is a classic Cassegrain layout used with an eccentric pupil and coupled to a tertiary off-axis paraboloidal mirror. To constrain the thermo-mechanically induced optical aberrations, the primary mirror (M1) temperature will be monitored and finely tuned using an active thermal control system based on thermistors and heaters. They will be switched on and off to maintain the M1 temperature within ± 1 K by the telescope control unit (TCU). The TCU is a payload electronics subsystem also responsible for the thermal control of the spectrometer module detectors as well as the secondary mirror mechanism and IR calibration source management. The TCU, being a slave subsystem of the instrument control unit, will collect the housekeeping data from the monitored subsystems and will forward them to the master unit. The latter will run the application software, devoted to the main spectrometer management and to the scientific data on-board processing. | URI: | http://hdl.handle.net/20.500.12386/26632 | URL: | https://link.springer.com/article/10.1007/s12567-017-0175-3 | ISSN: | 1868-2502 | DOI: | 10.1007/s12567-017-0175-3 | Bibcode ADS: | 2017CEAS....9..379D | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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12567_2017_175_Author.pdf | postprint | 5.01 MB | Adobe PDF | View/Open |
CEAS 2017 - An afocal telescope configuration for the ESA ARIEL mission.pdf | [Administrators only] | 3.8 MB | Adobe PDF |
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