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Refinements in the data analysis of VIRTIS-M-IR Venus nightside spectra

Kappel, David and Arnold, Gabriele and Haus, Rainer and Piccioni, Giuseppe and Drossart, Pierre (2012) Refinements in the data analysis of VIRTIS-M-IR Venus nightside spectra. Advances in Space Research. Elsevier. DOI: 10.1016/j.asr.2012.03.029

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1016/j.asr.2012.03.029

Abstract

The successful long-duration radiation measurements performed by the VIRTIS instrument aboard ESA’s Venus Express spacecraft have provided an excellent collection of atmospheric and surface data that stand out due to their high temporal and spatial coverage of the planet and due to a high diversity of measurement and environmental conditions. A detailed investigation of the VIRTIS-M-IR data archive is described and possible improvements in the analysis of Venus night and dayside spectra are discussed. These improvements are both based on the application of new retrieval algorithms and on some calibration and data preprocessing refinements including a detector sensitivity investigation, an advanced straylight removal technique, and the allocation of a revised surface topography model customized to the intended surface and deep atmosphere parameter retrieval. Different data binning schemes are investigated and recommendations for their use, based on scientific objectives, are given. While the precise impacts on the retrieved parameters are difficult to summarize in a few numbers due to the sophisticated relations between the measurement space and the high dimensional parameter space, some general or exemplary trends are presented. Compared to retrieval results from spectra based on the earlier calibration and preprocessing pipeline, for instance CO and SO2 can display a column density change in the order of 10%, and the surface emissivity at 1.02 μm can exhibit changes in the order of 0.2 and up to 0.36 in an example. Such changes can lead to different interpretations concerning atmospheric and geologic properties of Venus. The proposed refinements and the corresponding mathematical tools exploit the limits of what can be achieved with the available data. They enhance the retrieval reliability of atmospheric and surface parameters of Venus. Some of the tools described in the paper are not only very useful for VIRTIS data analyses, but should also provide interesting suggestions for a handling of data from other spaceborne experiments.

Item URL in elib:https://elib.dlr.de/75609/
Document Type:Article
Title:Refinements in the data analysis of VIRTIS-M-IR Venus nightside spectra
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kappel, DavidDavid.Kappel (at) dlr.deUNSPECIFIED
Arnold, Gabrielegabriele.arnold (at) dlr.deUNSPECIFIED
Haus, RainerWestfaelische Wilhelms Univ. MünsterUNSPECIFIED
Piccioni, GiuseppeINAF-IASF, Via del Fosso del Cavaliere, 100 00133 Rome, ItalyUNSPECIFIED
Drossart, PierreLESIA, Observatoire de Paris (CNRS-UMR 8109), 5 place Jules Janssen, 92195 Meudon, FranceUNSPECIFIED
Date:3 April 2012
Journal or Publication Title:Advances in Space Research
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.asr.2012.03.029
Publisher:Elsevier
Status:Published
Keywords:Venus; VIRTIS; Calibration; Radiative transfer; Retrieval; Multi-spectrum retrieval
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 Exploration des Sonnensystems (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Deposited By: Kappel, David
Deposited On:30 May 2012 08:21
Last Modified:06 Sep 2019 15:27

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