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VIRTIS on Venus Express: retrieval of real surface emissivity on global scales

Arnold, Gabriele and Kappel, David and Haus, Rainer and Tellez Pedroza, Laura and Piccioni, G. and Drossart, P. (2015) VIRTIS on Venus Express: retrieval of real surface emissivity on global scales. In: Infrared Remote Sensing and Instrumentation XXIII, 9608, pp. 960806-1. SPIE. Infrared Spaceborne Remote Sensing and Instrumentation XXIII, 09-13 Aug 2015, San Diego, CA, USA. DOI: 10.1117/12.2186619 ISSN 0277786X

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Official URL: http://dx.doi.org/10.1117/12.2186619

Abstract

The extraction of surface emissivity data provides the data base for surface composition analyses and enables to evaluate Venus’ geology. The Visible and InfraRed Thermal Imaging Spectrometer (VIRTIS) aboard ESA’s Venus Express mission measured, inter alia, the nightside thermal emission of Venus in the near infrared atmospheric windows between 1.0 and 1.2 μm. These data can be used to determine information about surface properties on global scales. This requires a sophisticated approach to understand and consider the effects and interferences of different atmospheric and surface parameters influencing the retrieved values. In the present work, results of a new technique for retrieval of the 1.0 – 1.2 μm – surface emissivity are summarized. It includes a Multi-Window Retrieval Technique, a Multi-Spectrum Retrieval technique (MSR), and a detailed reliability analysis. The MWT bases on a detailed radiative transfer model making simultaneous use of information from different atmospheric windows of an individual spectrum. MSR regularizes the retrieval by incorporating available a priori mean values, standard deviations as well as spatial-temporal correlations of parameters to be retrieved. The capability of this method is shown for a selected surface target area. Implications for geologic investigations are discussed. Based on these results, the work draws conclusions for future Venus surface composition analyses on global scales using spectral remote sensing techniques. In that context, requirements for observational scenarios and instrumental performances are investigated, and recommendations are derived to optimize spectral measurements for Venus’ surface studies.

Item URL in elib:https://elib.dlr.de/101357/
Document Type:Conference or Workshop Item (Speech)
Title:VIRTIS on Venus Express: retrieval of real surface emissivity on global scales
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Arnold, GabrieleGabriele.Arnold (at) dlr.deUNSPECIFIED
Kappel, DavidDavid.Kappel (at) dlr.deUNSPECIFIED
Haus, RainerWestfälische Wilhelms-Universität MünsterUNSPECIFIED
Tellez Pedroza, LauraLaura.TellezPedroza (at) dlr.deUNSPECIFIED
Piccioni, G.INAF-IASFUNSPECIFIED
Drossart, P.Observatoire de Paris, Meudon, FranceUNSPECIFIED
Date:1 September 2015
Journal or Publication Title:Infrared Remote Sensing and Instrumentation XXIII
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:9608
DOI :10.1117/12.2186619
Page Range:pp. 960806-1
Editors:
EditorsEmail
Strojnik, MarijaUNSPECIFIED
Publisher:SPIE
Series Name:Proceedings of SPIE
ISSN:0277786X
Status:Published
Keywords:Planetary remote sensing; terrestrial planets; Venus; spectroscopy
Event Title:Infrared Spaceborne Remote Sensing and Instrumentation XXIII
Event Location:San Diego, CA, USA
Event Type:international Conference
Event Dates:09-13 Aug 2015
Organizer:SPIE
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Venus Express Kamera (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Leitungsbereich PF
Deposited By: Kappel, David
Deposited On:05 Jan 2016 13:02
Last Modified:31 Jul 2019 19:58

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