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Venus surface data extraction from VIRTIS/VEX measurements. Part I: Estimation of a quantitative approach

Arnold, Gabriele and Haus, Rainer and Döhler, Wolfgang and Kappel, David and Drossart, Pierre and Piccioni, Guiseppe and VIRTIS/VEX Team, et.al. (2008) Venus surface data extraction from VIRTIS/VEX measurements. Part I: Estimation of a quantitative approach. Journal of Geophysical Research, 113 (E00B10), pp. 1-13. doi: 10.1029/2008JE003087.

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Official URL: http://onlinelibrary.wiley.com/doi/10.1029/2008JE003087/full


Nightside emission measurements of the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) on the Venus Express (VEX) spacecraft were used to estimate the potential for surface data extraction. A selection of orbits over the northern hemisphere was performed for footprints that cover different scales of surface elevation variations. A correction method was used to remove straylight from the measured spectra that is due to direct sunlight striking the instrument. A preliminary radiative transfer calculation technique was applied to simulate Venus nightside radiation. The basic features of the measured spectra are well reproduced. Present limitations of the algorithm are discussed. The variability of the emission window radiances with respect to cloud opacity and surface elevation is modelled and discussed in direct comparison with the measurements. It is demonstrated that a multi-spectral analysis in the surface and deep atmosphere window ranges (1.0-2.3 µm) and the use of radiance ratios are well suited to de-cloud the data and to extract surface information from the VIRTIS measurements. This method allows a mapping of surface topography and the retrieval of the surface temperature. A preliminary topography retrieval at Beta Regio was performed and compared with Magellan radar data. Differences are possibly due to emissivity variations on the surface.

Item URL in elib:https://elib.dlr.de/54578/
Document Type:Article
Title:Venus surface data extraction from VIRTIS/VEX measurements. Part I: Estimation of a quantitative approach
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Arnold, GabrieleWestfälische Wilhelms-Universität MünsterUNSPECIFIED
Döhler, WolfgangWestfälische Wilhelms-Universität MünsterUNSPECIFIED
Kappel, DavidWestfälische Wilhelms-Universität MünsterUNSPECIFIED
Drossart, PierreLESIA, Observatoire de Paris, FranceUNSPECIFIED
Piccioni, GuiseppeINAF-IASF, ItalyUNSPECIFIED
Date:24 January 2008
Journal or Publication Title:Journal of Geophysical Research
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.1029/2008JE003087
Page Range:pp. 1-13
EditorsEmailEditor's ORCID iD
AGU, Org.www.agu.orgUNSPECIFIED
Keywords:Venus, VEX/VIRTIS, Radiative transfer, Near-infrared windows, planetary surface, topography
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Entwicklung und Erprobung von Verfahren zur Gewässerfernerkundung (old)
Location: Berlin-Adlershof
Institutes and Institutions:Remote Sensing Technology Institute > Marine Remote Sensing
Deposited On:09 Oct 2008
Last Modified:04 Feb 2013 14:27

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