A230-0009
Spectral measurements of the atmospheric downwelling far-infrared radiation at the Zugspitze observatory

Wednesday, 16 December 2020
Poster
Claudio Belotti1, Marco Barucci1, Giovanni Bianchini1, Francesco D’Amato1, Samuele Del Bianco2, Gianluca Di Natale1, Marco Gai3, Alessio Montori1, Ralf Sussmann4, Silvia Viciani1, Hannes Vogelmann4 and Luca Palchetti1, (1)CNR-INO National Institute of Optics, Florence, Italy, (2)CNR Institute of Applied Physics " Nello Carrara ", Sesto Fiorentino, Italy, (3)Institute of Applied Physics "Nello Carrara'' - National Research Center of Italy, Sesto Fiorentino, Italy, (4)Karlsruhe Institute of Technology, IMK-IFU, Garmisch, Germany
Abstract:
ESA’s ninth Earth Explorer mission, the Far-infrared Outgoing Radiation Understanding and Monitoring (FORUM) is expected to be launched in 2026.

In preparation to FORUM, a new instrument demonstrator named Far-Infrared Radiation Mobile Observation System (FIRMOS), was developed for field applications from ground-based (and in perspective airborne) platforms to verify with real measurements the sounding capabilities provided by FIR observations.

FIRMOS is a Fourier Transform Spectrometer currently covering the 100-1000 cm−1 spectral range and has been in operation at the Zugspitze Observatory (Germany), at about 3000 m above sea level, in a two phases campaign (29 November - 18 December 2018 and 21 January - 20 February 2019), when it acquired observations of the downwelling far-infrared atmospheric emission together with the E-AERI instrument, which is permanently installed at the observatory and measures between 400 and 3000 cm−1.

In this work we present the instrument design, the spectral measurements acquired during the campaign and their validation against E-AERI.

Acknowledgments. The authors gratefully acknowledge the funding support by the European Space Agency with the FIRMOS project (ESA–ESTEC Contract No. 4000123691/18/NL/LF) and the Italian Space Agency with the research projects SCIEF (Italian acronym of Development of the National Competences for the FORUM experiment - ASI contract No. 2016-010-U.0)

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