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The Venus Emissivity Mapper

Helbert, Jörn and Marcq, E. and Widemann, T. and Müller, N. and Kappel, David and Tsang, C. C. C. and Maturilli, Alessandro and Ferrari, Sabrina and D'Amore, Mario and Dyar, M. Darby and Smrekar, S.E. (2016) The Venus Emissivity Mapper. In: Joint 48th meeting of the Division for Planetary Sciences (DPS) and 11th European Planetary Science Congress (EPSC), 48, 216.09-216.09. Joint 48th meeting of the Division for Planetary Sciences (DPS) and 11th European Planetary Science Congress (EPSC), 16.-21. Oct. 2016, Pasadena, CA, USA.

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Official URL: https://aas.org/meetings/dps48

Abstract

The permanent cloud cover of Venus prohibits observations of the surface with traditional imaging techniques over the entire visible spectral range. Fortunately, Venus' atmospheric gases are largely transparent in narrow spectral windows near 1 mm. Ground observers were the first to successfully use these windows, followed by spacecraft observations during the flyby of the Galileo mission on its way to Jupiter and most recently from Venus orbit by ESA's Venus Express with the VMC and VIRTIS instruments. Analyses of VIRTIS measurements have successfully demonstrated that surface information can be extracted from these windows, but the design of the instrument limited its use for more in-depth surface investigations.Based on experience gained from using VIRTIS to observe the surface of Venus and new high temperature laboratory experiments currently performed at the Planetary Spectroscopy Laboratory of DLR, we have designed the multi-spectral Venus Emissivity Mapper (VEM). Observations from VIRTIS have revealed surface emissivity variations correlated with geological features, but existing data sets contain only three spectral channels. VEM is optimized to map the surface composition and texture, and to search for active volcanism using the narrow atmospheric windows, building on lessons from prior instrumentation and methodology. It offers an opportunity to gain important information about surface mineralogy and texture by virtue of having six different channels for surface mapping.VEM is focused mainly on observing the surface, mapping in all near-IR atmospheric windows using filters with spectral characteristics optimized for the wavelengths and widths of those windows. It also observes bands necessary for correcting atmospheric effects; these bands also provide valuable scientific data on composition as well as altitude and size distribution of the cloud particles, and on H2O vapor abundance variations in the lowest 15 km of the atmosphere.In combination with a high-resolution radar mapper that provides accurate topographic data as planned for the NASA VERITAS mission or for the ESA EnVision mission, VEM will provide new insights into current properties and the geologic evolution of Venus.

Item URL in elib:https://elib.dlr.de/107048/
Document Type:Conference or Workshop Item (Poster)
Title:The Venus Emissivity Mapper
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Helbert, JörnJoern.Helbert (at) dlr.dehttps://orcid.org/0000-0001-5346-9505
Marcq, E.emmanuel.marcq (at) latmos.ipsl.frUNSPECIFIED
Widemann, T.LESIAUNSPECIFIED
Müller, N.Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena CA, 91109UNSPECIFIED
Kappel, DavidDavid.Kappel (at) dlr.deUNSPECIFIED
Tsang, C. C. C.Southwest Research Institute, Boulder, CO 80302, USAUNSPECIFIED
Maturilli, AlessandroAlessandro.Maturilli (at) dlr.deUNSPECIFIED
Ferrari, Sabrinasabrina.ferrari (at) dlr.deUNSPECIFIED
D'Amore, MarioMario.DAmore (at) dlr.dehttps://orcid.org/0000-0001-9325-6889
Dyar, M. DarbyDepartment of Astronomy, Mount Holyoke College, South Hadley, Massachusetts, USAUNSPECIFIED
Smrekar, S.E.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, USAUNSPECIFIED
Date:18 October 2016
Journal or Publication Title:Joint 48th meeting of the Division for Planetary Sciences (DPS) and 11th European Planetary Science Congress (EPSC)
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:48
Page Range:216.09-216.09
Status:Published
Keywords:Venus, VERITAS, VEM, Surface, Emissivity
Event Title:Joint 48th meeting of the Division for Planetary Sciences (DPS) and 11th European Planetary Science Congress (EPSC)
Event Location:Pasadena, CA, USA
Event Type:international Conference
Event Dates:16.-21. Oct. 2016
Organizer:American Astronomical Society
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 Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Institute of Planetary Research > Leitungsbereich PF
Deposited By: Kappel, David
Deposited On:25 Oct 2016 16:03
Last Modified:31 Jul 2019 20:04

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