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 O 2 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. © EAS, EDP Sciences 2005.
CASPER: Concordia atmospheric spectroscopy of emitted radiation / DE PETRIS, Marco; A., Catalano; DE GREGORI, Simone; Lamagna, Luca; V., Lattanzi; Luzzi, Gemma; Maoli, Roberto; Melchiorri, Alessandro; Melchiorri, Francesco; G., Savini; G. G., Vetrani; Battistelli, Elia Stefano; L., Valenziano; N., Mandolesi; F., Villa; F., Cuttaia; P. A. R., Ade; P., Mauskopf; A., Orlando; P., Encrenaz; J. R., Pardo; J., Cernicharo. - STAMPA. - 14:(2005), pp. 233-238. (Intervento presentato al convegno Dome C Astronomy and Astrophysics Meeting tenutosi a Toulouse; France nel 2004) [10.1051/eas:2005036].
CASPER: Concordia atmospheric spectroscopy of emitted radiation
DE PETRIS, Marco;DE GREGORI, Simone;LAMAGNA, Luca;LUZZI, GEMMA;MAOLI, Roberto;MELCHIORRI, Alessandro;MELCHIORRI, Francesco;BATTISTELLI, Elia Stefano;
2005
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 O 2 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. © EAS, EDP Sciences 2005.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
