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Proceedings Paper

Radiation Explorer in the Far Infrared BreadBoard (REFIR/BB) for the atmospheric emission measurement in the 100- to 1100-cm-1 spectral range
Author(s): Luca Palchetti; Francesco Esposito; Rolando Rizzi; Carmine Serio; Vincenzo Cuomo
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Paper Abstract

A spectrometer named Radiation Explorer in the Far InfraRed (REFIR) is being proposed for a future space mission aimed at the spectral measurement in the far infrared of the Earth outgoing emission, with particular attention at the spectral regions that are not covered by any current or planned space mission. The instrument requirements include continuous operation in the spectral range of 100-1100 cm-1 with a resolution of 0.5 cm-1, 6.5 s acquisition time, signal-to-noise ration better than 100 in the ranges 400-600 and 650-800 cm-1 and an accuracy of absolute calibration better than 0.5 K at 280 K at least in the range 400-650 cm-1. To meet these requirements, a spectrometer based on a polarising interferometer with a new optical configuration has been designed. The main characteristics include dual input and output ports, optics of the interferometer with full tilt compensation, and measurement of both planes of polarisation of the source on a single detector. In preparation for a possible space mission, a BreadBoard version (REFIR/BB) of the Fourier transform spectrometer has been built. REFIR/BB will allow us to study the trade-off between all instrument parameters, to test the optical layout and to optimise the data acquisition strategy. In perspective the breadboard could be flown for test flight on aircraft or balloon platforms. This paper describes REFIR/BB characteristics and preliminary experimental results with particular attention to the acquisition strategy and the instrument characterisation. Tests were performed both in air, at ground level, and under vacuum.

Paper Details

Date Published: 8 April 2003
PDF: 12 pages
Proc. SPIE 4881, Sensors, Systems, and Next-Generation Satellites VI, (8 April 2003); doi: 10.1117/12.462617
Show Author Affiliations
Luca Palchetti, Istituto di Fisica Applicata Nello Carrara (Italy)
Francesco Esposito, Univ. degli Studi della Basilcata (Italy)
Rolando Rizzi, Univ. degli Studi di Bologna (Italy)
Carmine Serio, Univ. degli Studi della Basilicata (Italy)
Vincenzo Cuomo, Istituto di Metodologie per l'Analisi Ambientale-CNR (Italy)

Published in SPIE Proceedings Vol. 4881:
Sensors, Systems, and Next-Generation Satellites VI
Hiroyuki Fujisada; Joan B. Lurie; Michelle L. Aten; Konradin Weber; Joan B. Lurie; Michelle L. Aten; Konradin Weber, Editor(s)

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