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The Berlin emissivity database

Maturilli, A. und Helbert, J. und Moroz, L. (2008) The Berlin emissivity database. Planetary and Space Science, 56 (3-4), Seiten 420-425. Elsevier. DOI: 10.1016/j.pss.2007.11.015.

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Kurzfassung

Remote-sensing infrared spectroscopy is the principal field of investigation for planetary surfaces composition. Past, present and future missions to the solar system bodies include in their payload, instruments measuring the emerging radiation in the infrared range. Apart from measuring the reflected radiance, more and more spacecrafts are equipped with instruments measuring directly the emitted radiation from the planetary surface. The emitted radiation is not only a function of the composition of the material but also of its texture and especially the grain size distribution. For the interpretation of the measured data an emissivity spectral library of planetary analogue materials in grain size fractions appropriate for planetary surfaces is needed. The Berlin emissivity database (BED) presented here is focused on relatively fine-grained size separates, providing thereby a realistic basis for the interpretation of thermal emission spectra of planetary regoliths. The BED is therefore complimentary to existing thermal emission libraries, like the ASU library for example. BED currently contains emissivity spectra of plagioclase and potassium feldspars, low Ca and high Ca pyroxenes, olivine, elemental sulfur, Martian analogue minerals and volcanic soils, and a lunar highland soil sample measured in the wavelength range from 7 to 22 μm as a function of particle size. For each sample we measured the spectra of four particle size separates ranging from &lt;25 to 250 μm. The device we used is built at DLR (Berlin) and is coupled to a Fourier-transform infrared spectrometer Bruker IFS 88 purged with dry air and equipped with a nitrogen-cooled MCT detector. All spectra were acquired with a spectral resolution of 4 cm<sup>‑1</sup>. We are currently working on upgrading our emissivity facility. A new spectrometer (Bruker VERTEX 80 V) and new detectors will allow us to measure the emissivity of samples in the wavelength range from 1 to 50 μm in a vacuum environment. This will be particularly important for the interpretation of the MERcury Thermal Infrared Imaging Spectrometer (MERTIS) data.

Dokumentart:Zeitschriftenbeitrag
Titel:The Berlin emissivity database
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Maturilli, A.NICHT SPEZIFIZIERT
Helbert, J.NICHT SPEZIFIZIERT
Moroz, L.NICHT SPEZIFIZIERT
Datum:März 2008
Erschienen in:Planetary and Space Science
Referierte Publikation:Ja
In ISI Web of Science:Ja
Band:56
DOI :10.1016/j.pss.2007.11.015
Seitenbereich:Seiten 420-425
Verlag:Elsevier
Status:veröffentlicht
Stichwörter:IR-spectroscopy; Emittance; Analogue materials; Mars; Mercury
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben BepiColombo (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Planetenphysik
Hinterlegt von: Stefanie Hempel
Hinterlegt am:14 Okt 2008
Letzte Änderung:27 Apr 2009 15:13

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