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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ciarletti, Valérie
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (34/34 displayed)
- 2025Characterizing heterogeneities in the subsurface with an ultra-wideband GPR: Application to WISDOM, the GPR of the Rosalind Franklin ExoMars mission
- 2024Characterizing heterogeneities in the subsurface with an ultra-wideband GPR: Application to WISDOM, the GPR of the Rosalind Franklin ExoMars mission
- 2022Retrieval of the ground dielectric permittivity by planetary GPR accommodated on a rover: Application to the estimation of the reflectors' depth by the WISDOM/ExoMars radarcitations
- 2021WISDOM Antenna Pattern in the presence of Rover and Soil
- 2020Validation of an automated detection and characterization of diffraction curves in the WISDOM/ExoMars radargrams with a Hough transform
- 2019The WISDOM radar on the ExoMars rover designed to provide 3D mapping of the shallow subsurface at Oxia Planum
- 2019Characterization and performances of the WISDOM ground penetrating radar for the ExoMars 2020 mission
- 2018CONSERT probing of 67P/C-G nucleus during the ROSETTA mission, operations and results
- 2017 Interior of 67P/C-G comet as seen by CONSERT bistatic radar on Rosetta
- 2017CONSERT constrains the internal structure of 67P at a few-metre size scalecitations
- 2016An interpretation of the CONSERT and SESAME-PP results based on new permittivity measurements of porous water ice and ice-basaltic/organic dust mixtures suggests an increase of porosity with depth in 67P
- 2016Looking at Comet 67P Sub-surface in the Vicinity of Abydos
- 2016Electrical properties of the first meters of 67P/Churyumov-Gerasimenko’s nucleus as constrained by PP-SESAME/Philae/Rosetta
- 2016The electrical properties of Titan’s surface at the Huygens landing site measured with the PWA-HASI Mutual Impedance Probe. New approach and new findingscitations
- 2016Electrical properties and porosity of the first meter of the nucleus of 67P/Churyumov-Gerasimenko. As constrained by the Permittivity Probe SESAME-PP/Philae/Rosettacitations
- 2016Electrical properties and porosity of the first meter of the nucleus of 67P/Churyumov-Gerasimenkocitations
- 2016Characterizing the interior of 67P in the vicinity of Abydos
- 2016Heterogeneities of 67P nucleus seen by CONSERT in the vicinity of Abydos
- 2016Effect of meter-scale heterogeneities inside 67P nucleus on CONSERT data
- 2015Insights gained from Data Measured by the CONSERT Instrument during Philae's Descent onto 67P/C-G's surface
- 2015CONSERT Radar Investigations of the Shallow Subsurface of Comet 67P, in the Vicinity of the Philae Lander
- 2015Properties of the 67P/Churyumov-Gerasimenko interior revealed by CONSERT radarcitations
- 2015Findings from the PP-SESAME experiment on board the Philae/ROSETTA lander on the surface of comet 67P
- 2015CONSERT suggests a change in local properties of 67P/Churyumov-Gerasimenko's nucleus at depthcitations
- 2015The CONSERT Instrument during Philae's Descent onto 67P/C-G’s surface: Insights on Philae’s Attitude and the Surface Permittivity Measurements at the Agilkia-Landing-Site
- 2015investigating with the CONSERT bistatic radar a potential permittivity gradient at the Philae Landing site on 67P/Churyumov-Gerasimenko
- 2015Revealing the Possible Existence of a Near-Surface Gradient in Local Properties of 67P/Churyumov-Gerasimenko Nucleus Through CONSERT Measurements
- 2015The interior of 67P/C-G nucleus revealed by CONSERT measurements and simulations
- 2015The interior of 67P/C-G nucleus revealed by CONSERT measurements and simulations
- 2014Titan Ground Complex Permittivity at the HUYGENS Landing Site; the PWA-HASI and Other Instruments Data Revisited
- 2014Measuring the permittivity of the surface of the Churyumov-Gerasimenko nucleus: the PP-SESAME experiment on board the Philae/ROSETTA lander
- 2014Revealing the properties of Chuyurmov-Gerasimenko's shallow sub-surface through CONSERT's measurements at grazing angles
- 2013Evaluation of the first simulation tool to quantitatively interpret the measurements of the ExoMars mission's Wisdom GPR
- 2012Simulation of in-flight calibrations and first cometary permittivity measurements by PP-SESAME on Philae
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document
Insights gained from Data Measured by the CONSERT Instrument during Philae's Descent onto 67P/C-G's surface
Abstract
The scientific objective of the Comet Nucleus Sounding Experiment by Radiowave Transmission (CONSERT) aboard ESA spacecraft Rosetta is to perform a dielectric characterization of comet 67P/Chuyurmov-Gerasimenko's nucleus. This is done by means of a bi-static sounding between the lander Philae launched onto the comet's surface and the orbiter Rosetta. For the sounding, the CONSERT unit aboard the lander will receive and process the radio signal emitted by the orbiter counterpart of the instrument. It will then retransmit a signal back to the orbiter to be received by CONSERT. This happens at the milliseconds time scale. During the descent of lander Philae onto the comet's surface, CONSERT was operated as a bi-static RADAR. A single measurement of the obtained data is composed of the dominant signal from the direct line-of-sight propagation path between lander and orbiter as well as paths from the lander's signal being reflected by the comet's surface. From peak power measurements of the dominant direct path during the descent, the knowledge of the orbiter and lander positions and simulations of CONSERT's orbiter and lander antenna characteristics as well as polarization properties, we were able to reconstruct the lander's attitude and estimate the spin rate of the lander along the descent trajectory. Additionally, certain operations and manoeuvres of orbiter and lander, e.g. the deployment of the lander legs and CONSERT antennas or the orbiter change of attitude in order to orient the science towards the assumed lander position, are also visible in the data. The information gained on the landers attitude is used in the reconstruction of the dielectric properties of 67P/C-G's surface and near subsurface (metric to decametric scale) and will hopefully prove helpful supporting the data interpretation of other instruments. In the CONSERT measurements, the comet's surface is visible during roughly the last third of the descent enabling a mean permittivity estimation of the surface and near subsurface covered by the instruments footprint along the descent path. The comparatively large timespan with surface signatures exhibits a spatial diversity necessary for the mapping of dominant signatures and the estimation of the dielectric properties of prominent features yielding a possible contrast and permittivity mapping of the comet's surface in the vicinity of the original landing site.