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Reflectivity of Venus's Dayside Disk During the 2020 Observation Campaign: Outcomes and Future Perspectives

Lee, Yeon Joo and Garcia Munoz, A. and Yamazaki, Atsushi and Quemerais, Eric and Mottola, Stefano and Hellmich, Stephan and Granzer, T. and Roth, M. and Gallego-Cano, E. and Chaufray, Jean-Yves and Robidel, R and Murakami, G. and Masunaga, K. and Kaplan, Murat and Hueso, R. and Kabath, P. and Spokova, M. and Sanchez-Lavega, A. and Kim, Myung-Jin and Mangano, Valeria and Jessup, Kandis Lea and Widemann, Thomas and Sugiyama, Ko-ichiro and Watanabe, Shigeto and Yamada, M. and Satoh, Takehiko and Nakamura, M. and Imai, Masataka and Cabrera Perez, Juan (2022) Reflectivity of Venus's Dayside Disk During the 2020 Observation Campaign: Outcomes and Future Perspectives. The Planetary Science Journal, 9 (3). Institute of Physics (IOP) Publishing. doi: 10.3847/PSJ/ac84d1. ISSN 2632-3338.

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Official URL: https://iopscience.iop.org/article/10.3847/PSJ/ac84d1


We performed a unique Venus observation campaign to measure the disk brightness of Venus over a broad range of wavelengths in 2020 August and September. The primary goal of the campaign was to investigate the absorption properties of the unknown absorber in the clouds. The secondary goal was to extract a disk mean SO2 gas abundance, whose absorption spectral feature is entangled with that of the unknown absorber at ultraviolet wavelengths. A total of three spacecraft and six ground-based telescopes participated in this campaign, covering the 52-1700 nm wavelength range. After careful evaluation of the observational data, we focused on the data sets acquired by four facilities. We accomplished our primary goal by analyzing the reflectivity spectrum of the Venus disk over the 283-800 nm wavelengths. Considerable absorption is present in the 350-450 nm range, for which we retrieved the corresponding optical depth of the unknown absorber. The result shows the consistent wavelength dependence of the relative optical depth with that at low latitudes, during the Venus flyby by MESSENGER in 2007, which was expected because the overall disk reflectivity is dominated by low latitudes. Last, we summarize the experience that we obtained during this first campaign, which should enable us to accomplish our second goal in future campaigns.

Item URL in elib:https://elib.dlr.de/189559/
Document Type:Article
Title:Reflectivity of Venus's Dayside Disk During the 2020 Observation Campaign: Outcomes and Future Perspectives
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Lee, Yeon JooUNSPECIFIEDhttps://orcid.org/0000-0002-4571-0669
Garcia Munoz, A.AIM, CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, F-91191 Gif-sur-Yvette, Francehttps://orcid.org/0000-0003-1756-4825
Yamazaki, AtsushiISAS/JAXA, Sagamihara, JapanUNSPECIFIED
Quemerais, EricLATMOS, Université Versailles Saint-Quentin, Guyancourt, FranceUNSPECIFIED
Granzer, T.Leibniz-Institut für Astrophysik Potsdam, An der SternwarteUNSPECIFIED
Roth, M.Leibniz-Institute for Astrophysics Potsdam (AIP), Potsdam, GermanyUNSPECIFIED
Chaufray, Jean-YvesLATMOS, Université Versailles Saint-Quentin, Guyancourt, FranceUNSPECIFIED
Robidel, RLATMOS-OVSQ, Université Versailles Saint-Quentin, Guyancourt, FranceUNSPECIFIED
Masunaga, K.Institute of Space and Astronautical Science (ISAS/JAXA), Sagamihara, JapanUNSPECIFIED
Kaplan, MuratAkdeniz Universitesi, TurkeyUNSPECIFIED
Hueso, R.Física Aplicada I, Escuela de Ingeniería de Bilbao, Universidad del País Vasco, Bilbao, SpainUNSPECIFIED
Kabath, P.Astronomical Institute ASCR, Fricova 298, 25165 Ondrejov, Czech RepublicUNSPECIFIED
Spokova, M.Astronomical Institute, Czech Academy of Sciences, Fričova 298, 251 65, Ondřejov, Czech RepublicUNSPECIFIED
Sanchez-Lavega, A.Dpto. Física Aplicada, Universidad de Pais Vasco, Bilbao, SpainUNSPECIFIED
Mangano, ValeriaINAF-IAPS (Institute for Astrophysics and Planetology from Space), via del Fosso del Cavaliere 100, 00133, Rome, ItalyUNSPECIFIED
Jessup, Kandis LeaSouthwest Research InstituteUNSPECIFIED
Widemann, ThomasLESIA,Observatoire de Paris, Meudon, FranceUNSPECIFIED
Sugiyama, Ko-ichiroMatsue National College of Technology, Matsue, JapanUNSPECIFIED
Watanabe, ShigetoSpace Information Center, Hokkaido Information University, Ebetsu, JapanUNSPECIFIED
Yamada, M.Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, JapanUNSPECIFIED
Satoh, TakehikoISAS/JAXA, Sagamihara, JapanUNSPECIFIED
Nakamura, M.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Chôfu, JapanUNSPECIFIED
Imai, MasatakaAIST, Tokyo, JapanUNSPECIFIED
Cabrera Perez, JuanUNSPECIFIEDhttps://orcid.org/0000-0001-6653-5487
Date:September 2022
Journal or Publication Title:The Planetary Science Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Publisher:Institute of Physics (IOP) Publishing
Keywords:Venus; Atmospheric clouds; Planetary science; Solar system astronomy; Planetary atmospheres; Observational astronomy; 1763; 2180; 1255; 1529; 1244; 1145; Astrophysics - Earth and Planetary Astrophysics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project PLATO - PMC and Science
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Institute of Planetary Research > Planetary Geodesy
Deposited By: Cabrera Perez, Juan
Deposited On:03 Nov 2022 10:13
Last Modified:21 Dec 2022 04:12

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