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

Gabriele E. Arnold; David Kappel; Rainer Haus; Laura Telléz Pedroza; Giuseppe Piccioni; Pierre Drossart

doi:10.1117/12.2186619

1 September 2015 VIRTIS on Venus Express: retrieval of real surface emissivity on global scales

Gabriele E. Arnold, David Kappel, Rainer Haus, Laura Telléz Pedroza, Giuseppe Piccioni, Pierre Drossart

Proceedings Volume 9608, Infrared Remote Sensing and Instrumentation XXIII; 960806 (2015) https://doi.org/10.1117/12.2186619
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

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.

Citation Download Citation

Gabriele E. Arnold, David Kappel, Rainer Haus, Laura Telléz Pedroza, Giuseppe Piccioni, and Pierre Drossart "VIRTIS on Venus Express: retrieval of real surface emissivity on global scales", Proc. SPIE 9608, Infrared Remote Sensing and Instrumentation XXIII, 960806 (1 September 2015); https://doi.org/10.1117/12.2186619

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Venus

Spectroscopy

Infrared spectroscopy

Thermography

Radiative transfer

Atmospheric modeling

Infrared radiation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years