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Measuring the Spectral Properties of Candidate Mineral Sources of the Venus Radar Anomalies

Kohler, Erika und Maturilli, Alessandro und Koulen, J.M und Helbert, Jörn (2016) Measuring the Spectral Properties of Candidate Mineral Sources of the Venus Radar Anomalies. AGU 2016, San Francisco.

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Kurzfassung

Radar mapping of the surface of Venus shows areas of high reflectivity (low emissivity) in the Venusian highlands at altitudes between 2.5-4.75 kilometers. The origin of the radar anomalies found in the highlands remains unclear. Previous experimental research investigated possible materials under simulated Venusian atmospheric and surface conditions, with special emphasis on the combined effect of pressure and temperature, and chemical composition. The results of these studies identified candidate source materials for the radar anomalies. In order to fully be considered a true source candidate the material must have spectroscopic measurements comparable to those measured on the surface of Venus where the high temperature affects spectral characteristics of minerals. The spectroscopic measurements of the previously identified candidate minerals were made at the Planetary Spectroscopy Laboratory (PSL) of DLR in Berlin in an effort to identify the anomaly source. The spectroscopic measurements were made with a FTIR Bruker Vertex 80V evacuated to ~.1 mbar and using several pairings of detector+beamsplitter to cover the spectral range from 0.2 to 20 µm. Each sample was poured in a stainless steel reflectance cup and measured fresh. Successively each cup was heated (via an induction system) in vacuum (0.07 mbar) at 400°C for 8 hours and measured again in the UV+VIS+MIR spectral range. Three consecutive cycles of heating and measuring reflectance were performed to account for spectral variations arising from the thermal processing of the samples. Heating the samples directly inside the reflectance cups allows to measure every time exactly the same surface, exposed to increasing levels of thermal processing. Results from this study are expected to further constrain the source of the Venus radar anomalies.

elib-URL des Eintrags:https://elib.dlr.de/109411/
Dokumentart:Konferenzbeitrag (Poster)
Titel:Measuring the Spectral Properties of Candidate Mineral Sources of the Venus Radar Anomalies
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Kohler, ErikaUniversity of ArkansasNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Maturilli, AlessandroAlessandro.Maturilli (at) dlr.dehttps://orcid.org/0000-0003-4613-9799NICHT SPEZIFIZIERT
Koulen, J.MDLR-PFNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Helbert, JörnJoern.Helbert (at) dlr.dehttps://orcid.org/0000-0001-5346-9505NICHT SPEZIFIZIERT
Datum:15 Dezember 2016
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Venus, PSL, Spectroscopy
Veranstaltungstitel:AGU 2016
Veranstaltungsort:San Francisco
Veranstaltungsart:internationale Konferenz
Veranstalter :AGU
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erforschung des Weltraums
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben BepiColombo (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Experimentelle Planetenphysik
Hinterlegt von: Maturilli, Dr. Alessandro
Hinterlegt am:15 Dez 2016 08:51
Letzte Änderung:29 Mär 2023 00:31

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