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Preliminary Interpretation of Surface Observations with VIRTIS on Venus Express

Müller, N. and Helbert, J. and Marinangeli, L. and Piccioni, G. and Drossart, P. and Hashimoto, G.L. and VIRTIS-VEX-Team, (2007) Preliminary Interpretation of Surface Observations with VIRTIS on Venus Express. In: Geophysical Research Abstracts, 9, 08803. EGU General Assembly, 2007-04-15 - 2007-04-20, Vienna, Austria.

Full text not available from this repository.

Official URL: http://www.cosis.net/abstracts/EGU2007/08803/EGU2007-J-08803.pdf

Abstract

Through narrow spectral regions at 1.02, 1.10 and 1.18 μm thermal emission from the surface of Venus escapes into space, carrying with it information about its source. Since orbit insertion in April 2006 VIRTIS on Venus Express is mapping this radiation using nightside observation of Venus. While the atmospheric windows show little CO2 absorption, the radiance from the surface is still affected by scattering in the clouds. This effect varies based on the optical thickness of the clouds. We present a data processing pipeline for the VIRTIS-M data which corrects for various atmospheric effects, incl. limb darkening, scattered sunlight, etc and provides a ’declouding’ algorithm that retrieves surface information from VIRTIS multispectral infrared images. Using this pipeline we have mapped the southern hemisphere of Venus and will present a preliminary interpretation of the results. This interpretation includes correlation with Magellan radar altimetry and microwave emissivity as well as a search for systematic variation of surface emissivity with morphological features such as tesserae, coronae or plains. An upper limit of transient temperature anomalies observed in the areas covered by VIRTIS during several consecutive orbits will be given.

Document Type:Conference or Workshop Item (Speech)
Title:Preliminary Interpretation of Surface Observations with VIRTIS on Venus Express
Authors:
AuthorsInstitution or Email of Authors
Müller, N.UNSPECIFIED
Helbert, J.UNSPECIFIED
Marinangeli, L.IRSPS, Universita d Annunzio, Viale Pindaro, 42, Pescara, 65127 Italy
Piccioni, G.INAF - IASF Roma, Via del Fosso del Cavaliere 100, Roma, 00133
Drossart, P.LESIA - Observatoire de Paris, 61 avenue del observatoire, Paris, 75014 France
Hashimoto, G.L.Graduate School of Science and Technology, Kobe, University, Nada-ku, Kobe, 657- 8501 Japan
VIRTIS-VEX-Team, UNSPECIFIED
Date:20 April 2007
Journal or Publication Title:Geophysical Research Abstracts
Volume:9
Page Range:08803
Status:Published
Keywords:Venus, surface, Venus Express, VIRTIS
Event Title:EGU General Assembly
Event Location:Vienna, Austria
Event Type:international Conference
Event Dates:2007-04-15 - 2007-04-20
Organizer:European Geosciences Union
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben Venus Express (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Deposited By: Stefanie Musiol
Deposited On:10 May 2007
Last Modified:27 Apr 2009 13:42

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