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CASPER: Concordia Atmospheric SPectroscopy of Emitted Radiation

De Petris, M., Catalano, A., De Gregori, S., Lamagna, L., Lattanzi, V., Luzzi, G., Maoli, R., Melchiorri, A., Melchiorri, F., Savini, G., Vetrani, G. G., Battistelli, E. S., Valenziano, L., Mandolesi, N., Villa, F., Cuttaia, F., Ade, Peter A. R., Mauskopf, Philip Daniel, Orlando, Angiola, Encrenaz, P., Pardo, J. R. and Cernicharo, J. 2005. CASPER: Concordia Atmospheric SPectroscopy of Emitted Radiation. Presented at: Dome C: Astronomy and Astrophysics Meeting, Toulouse, France, 28-30 June 2004. Published in: Giard, M. ed. Dome C: Astronomy and Astrophysics Meeting : Toulouse, 28-30 June 2004. EAS publications series Les Ulis, France: EDP Sciences, pp. 233-238. 10.1051/eas:2005036

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Abstract

CASPER (Concordia Atmospheric SPectroscopy of Emitted Radiation) is a spectrometer proposed for installation at Dome C, devoted to measurements of atmospheric emission in the spectral region between 180 μm and 3 mm (3–55 cm-1). This instrument will be able to perform continuous spectral sampling at different altitudes at angular scales of ~1°. From the recorded data it is possible to extract atmospheric transmittance within 1% in the whole wide operating band, together with water vapour content and O2 and O3 concentrations. CASPER will allow us to characterize the site for future FIR/mm telescopes. Atmospheric data recorded by CASPER will allow for correction of astrophysical and cosmological observations without the need for telescope-specific procedures and further loss of observation time with more precision in the observations themselves. Calibration of ground-based telescopes on known sky sources is strongly affected by atmospheric absorption. CASPER has this as its primary goal. The spectrometer is based on a Martin-Puplett interferometer. Two data sampling solutions will be performed: phase modulation & fast scan strategy. Sky radiation is collected towards the interferometer by an optical setup that allows the field of view, to explore the full 0° ÷ 90° range of elevation angles. With a low spurious polarization instrument, monitoring of polarized atmospheric contribution will be possible.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: EDP Sciences
ISBN: 9782868838353
ISSN: 1633-4760
Last Modified: 13 Oct 2017 22:18
URI: http://orca-mwe.cf.ac.uk/id/eprint/41928

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