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An attempt to detect transient changes in Io's SO2 and NaCl atmosphere

Lorenz Roth, Jeremie Boissier, Arielle Moullet, Álvaro Sánchez-Monge, Katherine de Kleer, Mizuki Yoneda, Reina Hikida, Hajime Kita, Fuminori Tsuchiya, Aljona Blöcker, G. Randall Gladstone, Denis Grodent (+7 others)
2020 Icarus (New York, N.Y. 1962)  
Observed dimmings in both the sulfur ion torus and Na neutral cloud suggest rather a decrease in mass loading in the period of increasing SO2 abundance.  ...  This increase in SO2 from December 2016 to March 2017 might be related to increasing volcanic activity observed at several sites in spring 2017, but the stability of the volcanic trace gas NaCl and resulting  ...  Atmosphere modeling The observed SO 2 and NaCl lines are fitted using the radiative transfer model used in Moullet et al. (2010) .  ... 
doi:10.1016/j.icarus.2020.113925 fatcat:cvqremfvpjfcbmzmrzho4ovxyi

Hubble Space Telescope Imaging of the North Polar Aurora on Jupiter

J. Caldwell, B. Turgeon, X. -M. Hua
1992 Science  
Table 1 summarizes the full set of observational and model-derived quantities.  ...  The Ulysses trajectory through the modeled particle distribution can be used to specify the [Na*] density at the spacecraft's location (Fig. 3) .  ...  to the 0, model of Connemey (7).  ... 
doi:10.1126/science.257.5076.1512 pmid:17776159 fatcat:5dsceki3njc53dmbdsrf3uaqmu

An Automated Approach to Modeling Jupiter's Synchrotron Radiation from Radio Telescope Observations

Peyton Robertson, Connor Espenshade, Jay Sarva, Owen Dugan, Kalée Tock
2020 Astronomy: Theory, Observation and Methods  
In this study, we used 2.295 GHz radio telescope data to study synchrotron radiation from Jupiter's magnetosphere.  ...  Plotting Jupiter's flux against the longitude facing Earth at the time of each scan revealed a periodic relationship between the variables and thus a model for expected synchrotron flux from Jupiter observed  ...  Special thanks to the GAVRT staff for providing training sessions and dedicating time to allow us to use the Goldstone Apple Valley Telescope alongside providing useful information relevant to the project  ... 
doi:10.32374/atom.2020.1.3 fatcat:r5ufnmhyxjcuvjqbvo5m6onbn4

Remote sensing of the Io torus plasma ribbon using natural radio occultation of the Jovian radio emissions

M. Y. Boudjada, P. H. M. Galopeau, S. Sawas, H. Lammer
2014 Annales Geophysicae  
CML), respectively.  ...  The maxima of enhancements/attenuations of UV/HOM observations occur close to the longitudes of the tip of the magnetic dipole in the southern hemisphere (20° CML) and in the northern hemisphere (200°  ...  Kurth, principal investigator and co-investigator of the RPWS experiment onboard Cassini, for making the data available for this work. Topical Editor E.  ... 
doi:10.5194/angeo-32-1119-2014 fatcat:alqbq3uzavagjejnyj6ts26dte

A survey of modeling, rendering and animation of clouds in computer graphics

Prashant Goswami
2020 The Visual Computer  
Realistic cloud generation is a challenging task, which entails processes such as modeling, photorealistic rendering and simulation of the clouds.  ...  Clouds play an important role in enhancing the realism of outdoor scenes in computer graphics (CG).  ...  Acknowledgements Open access funding provided by Blekinge Institute of Technology.  ... 
doi:10.1007/s00371-020-01953-y fatcat:l5aa44bkzre2bpxqu2xanhvzha

Modeling Jupiter's decametric modulation lanes

Kazumasa Imai, Liyun Wang, Thomas D. Can
1997 Journal of Geophysical Research  
Our model provides remarkably close fits to the best available modulation lane observations, and also yields values of both the lead angle of the radio-emitting flux tube ahead of Io and the cone half-angle  ...  Although it has been more than two decades since the discovery of the modulation lanes in the dynamic spectra of Jupiter's decametric radiation by Riihimaa, a realistic model accounting for them has not  ...  This study was made while one of the authors (K. I.) was in residence at the University of Florida, Department of Astronomy, as a  ... 
doi:10.1029/96ja03960 fatcat:a7qggob66vgk7esxe63hjfmpoy

The Dual Sources of Io's Sodium Clouds

Jody K. Wilson, Michael Mendillo, Jeffrey Baumgardner, Nicholas M. Schneider, John T. Trauger, Brian Flynn
2002 Icarus (New York, N.Y. 1962)  
Io's sodium clouds result mostly from a combination of two atmospheric escape processes at Io.  ...  Atmospheric sputtering of Na by plasma torus ions produces the "banana cloud" near Io and a diamond-shaped sodium nebula.  ...  We thank Matthew Burger for assistance with modeling and Robert Sturm for data processing assistance.  ... 
doi:10.1006/icar.2002.6821 fatcat:3xlt27niunaw3ojxr7cebchyke

Auroral evidence of Io's control over the magnetosphere of Jupiter

B. Bonfond, D. Grodent, J.-C. Gérard, T. Stallard, J. T. Clarke, M. Yoneda, A. Radioti, J. Gustin
2012 Geophysical Research Letters  
were triggered by Io's volcanic activity.  ...  The contemporary observation of the spectacular Tvashtar volcanic plume by the New-Horizons probe as well as direct measurement of increased Io plasma torus emissions suggest that these dramatic changes  ...  Created by the sublimation of SO 2 frost of volcanic origin, Io's tenuous atmosphere releases around 1 ton/second of SO 2 in the form of a neutral cloud.  ... 
doi:10.1029/2011gl050253 fatcat:jubrgy63gbfzfkx3ejqtna7ecm

Europa's FUV auroral tail on Jupiter

D. Grodent, J.-C. Gérard, J. Gustin, B. H. Mauk, J. E. P. Connerney, J. T. Clarke
2006 Geophysical Research Letters  
We thank very much both referees for their constructive review of our manuscript.  ...  Partial funding for this research was provided by the PRODEX program of the European Space Agency (ESA).  ...  The presence of such a plasma cloud or plume has been suggested by different authors.  ... 
doi:10.1029/2005gl025487 fatcat:rkzeusdwpbhn3in63fxm5pjnva

Enhancement of the Jovian Magnetospheric Plasma Circulation Caused by the Change in Plasma Supply From the Satellite Io

F. Tsuchiya, K. Yoshioka, T. Kimura, R. Koga, G. Murakami, A. Yamazaki, M. Kagitani, C. Tao, F. Suzuki, R. Hikida, I. Yoshikawa, Y. Kasaba (+3 others)
2018 Journal of Geophysical Research - Space Physics  
In fact, significant variations of the plasma population in the inner magnetosphere caused by the volcanic eruptions in Io were found in early 2015, using a continuous data set of the Io plasma torus obtained  ...  The innermost Galilean satellite, Io, supplies a large amount of volcanic gasses to the Jovian magnetosphere.  ...  We acknowledge the contribution of the International Space Sciences Institute (ISSI) in Bern, Switzerland, for hosting and funding the ISSI international team on "The influence of Io on Jupiter's magnetosphere  ... 
doi:10.1029/2018ja025316 fatcat:cz7hde7xd5a27lbttaktgb3sf4

Synoptic observations of Jupiter's radio emissions: Average statistical properties observed by Voyager

J. K. Alexander, T. D. Carr, J. R. Thieman, J. J. Schauble, A. C. Riddle
1981 Journal of Geophysical Research  
Compilations of occurrence probability, average power flux density and average sense of circular polarization are presented as a function of central meridian longitude, phase of Io, and frequency.  ...  properties of the emissions.  ...  It should be possible to use these plots to construct a model of emission beam shape as a function of frequen-y, and when suitable ray tracing facilities are utilized, to expand the model to include plasma  ... 
doi:10.1029/ja086ia10p08529 fatcat:5bsenhqmsnd7jjscwjcm66j7uu

Mid-infrared detection of large longitudinal asymmetries in Io's SO atmosphere

J SPENCER, E LELLOUCH, M RICHTER, M LOPEZVALVERDE, K LEAJESSUP, T GREATHOUSE, J FLAUD
2005 Icarus (New York, N.Y. 1962)  
Interpretation of the spectra requires modeling of surface temperatures and atmospheric density across Io's disk, and the variation in non-LTE ν 2 vibrational temperature with altitude, and depends on  ...  However it is not clear whether the correlation results from volcanic control (regions of large frost abundance result from greater condensation of atmospheric gases supported by more vigorous volcanic  ...  The fabrication of TEXES was supported primarily by the National Science Foundation, with additional support from the National Aeronautics and Space Administration through the Universities Space Research  ... 
doi:10.1016/j.icarus.2005.01.019 fatcat:ceou7yjocvbehfk7ac6qvbj7i4

Time variability of Io's volcanic activity from near-IR adaptive optics observations on 100 nights in 2013–2015

Katherine de Kleer, Imke de Pater
2016 Icarus (New York, N.Y. 1962)  
The detector is a 1024x1024 Aladdin InSb array, which we 21 use with the f/32 camera for a platescale of 0.022"/pixel, corresponding to ∼45 pixels across the disk of Io, or 22 ∼80 km/pixel at disk center  ...  Brian Cameron of the California Institute of Technology 5  ...  The use of adaptive optics provides the spatial 24 resolution to identify and extract the flux densities of individual volcanic hot spots.  ... 
doi:10.1016/j.icarus.2016.06.019 fatcat:ghkl2jsz3ffove6fnchs4o4gjy

Multimodal remote sensing benchmark datasets for land cover classification with a shared and specific feature learning model

Danfeng Hong, Jingliang Hu, Jing Yao, Jocelyn Chanussot, Xiao Xiang Zhu
2021 ISPRS journal of photogrammetry and remote sensing (Print)  
and synthetic aperture radar (SAR) data, Augsburghyperspectral, SAR, and digital surface model (DSM) data, are released and used for land cover classification.  ...  Extensive experiments conducted on the three datasets demonstrate the superiority and advancement of our S2FL model in the task of land cover classification in comparison with previously-proposed state-of-the-art  ...  Acknowledgement The authors would like to the Hyperspectral Image Analysis group at the University of Houston and the IEEE GRSS DFC2013 for providing the University of Houston HS dataset.  ... 
doi:10.1016/j.isprsjprs.2021.05.011 fatcat:zx4qrfd5c5gh3odgah5mmatqua

Statistical analysis of 26 yr of observations of decametric radio emissions from Jupiter

M. S. Marques, P. Zarka, E. Echer, V. B. Ryabov, M. V. Alves, L. Denis, A. Coffre
2017 Astronomy and Astrophysics  
We determine the contours of all emission types in the CML−Φ Io plane (Central Meridian Longitude in Jupiter's System III coordinates versus Io Phase), provide representative examples of their typical  ...  We present the results of the first statistical analysis of this database.  ...  Our classification criteria allowed us to identify a new emission type with unique spectral characteristics, covering a specific area of the CML−Φ Io plane.  ... 
doi:10.1051/0004-6361/201630025 fatcat:avw7hq2vo5ct7buvh4iq2skyaq
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