A5000632646- Astro and Planetary Science
- Planetary Science and Exploration
- Spacecraft and Cryogenic Technologies
- Space Satellite Systems and Control
- Spacecraft Design and Technology
- Historical Astronomy and Related Studies
- Geology and Paleoclimatology Research
- Maritime and Coastal Archaeology
- Nuclear Physics and Applications
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Spacecraft Dynamics and Control
- Isotope Analysis in Ecology
- Image Processing and 3D Reconstruction
- Scientific Research and Philosophical Inquiry
- Radio Wave Propagation Studies
- Geophysics and Sensor Technology
- Scientific Research and Discoveries
- Ancient Mediterranean Archaeology and History
- Biblical Studies and Interpretation
- Historical Geography and Cartography
- Geophysical Methods and Applications
- Simulation Techniques and Applications
- Particle accelerators and beam dynamics
- Service-Oriented Architecture and Web Services
Centre National de la Recherche Scientifique
2012-2021
Université Grenoble Alpes
2012-2021
Institut de Planétologie et d'Astrophysique de Grenoble
2012-2021
National Council for Scientific Research
2018
Centrale Marseille
2017
Institut Fresnel
2017
Université Joseph Fourier
2012
The Philae lander provides a unique opportunity to investigate the internal structure of comet nucleus, providing information about its formation and evolution in early solar system. We present Comet Nucleus Sounding Experiment by Radiowave Transmission (CONSERT) measurements interior 67P/Churyumov-Gerasimenko. From propagation time form signals, upper part "head" 67P is fairly homogeneous on spatial scale tens meters. CONSERT also reduced size uncertainty Philae's final landing site down...
Context. After the successful landing of Philae on nucleus 67P/Churyumov-Gerasimenko, Rosetta mission provided first opportunity performing measurements with CONSERT tomographic radar in November 2014. data were acquired during this science sequence. They unambiguously showed that propagation through smaller lobe was achieved.
ABSTRACT CONSERT, a bistatic radar onboard the Rosetta spacecraft and its Philae lander, was designed to probe nucleus of comet 67P/Churyumov–Gerasimenko with radio waves at 90 MHz frequency. In 2016 September, exact position retrieved, within region previously identified by CONSERT. This allowed us revisit measurements improve our analysis properties interior, results which we present here. The relative permittivity materials is found range from about 1.7 1.95 in shallow subsurface...
Since Rosetta's lander Philae touched down on comet 67P/Churyumov-Gerasimenko November 12, 2014, many tools have been applied to reconstruct Philae's flight path and attitude between separation, the touchdowns, collision final landing at Abydos. In addition images from cameras onboard both orbiter ("OSIRIS", "CIVA" "ROLIS"), radio tracking results, solar array data link housekeeping data, one of major sources for timing information were two point magnetic field measurements by magnetometers...
Our knowledge of the internal structure asteroids is currently indirect and relies entirely on inferences from remote sensing observations surfaces. Radar observation most mature technique available in order to characterize their structure, which fundamental for understanding small bodies' history planetary defense missions. However, as geometry complex, simulation radar design signal required assess instrument performance thus mission science return. SPRATS a software package designed...
<p>The Low Frequency Radar (LFR) on the JUVENTAS CubeSat for HERA / ESA mission to Didymos Binary Asteroid is a unique opportunity perform direct measurements of its internal structure and regolith. LFR has been developed fathom asteroid from small platform. This instrument inherited CONSERT/Rosetta redesigned in frame AIDA mission.</p><p>Onboard JUVENTAS, operating monostatic mode probe down first hundreds meters into subsurface achieve full...
Many future space missions to asteroids and comets will implement autonomous or near-autonomous navigation, in order save costly observation time from Earth tracking stations, improve the security of spacecraft perform real-time operations. Existing Earth-Spacecraft-Earth modes rely on severely limited station resources, with back-and-forth delays up several hours. In this paper, we investigate use CONSERT ranging data acquired direct visibility between lander Philae Rosetta orbiter, frame...