CASSINI/altimeter and VIMS complementarity: example using observations over the same area from Ta and T13 Titan's flybys
The altimeter mode of the Ku-band RADAR experiment onboard the Cassini-Huygens mission has been designed primarily for the study of Titan's surface topography. Inspired by what is done on the Earth in icy contexts like in the Antarctic, Cassini altimetry data can also be used to retrieve the ra...
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ftccsdartic:oai:HAL:hal-00129685v1 2023-05-15T13:32:49+02:00 CASSINI/altimeter and VIMS complementarity: example using observations over the same area from Ta and T13 Titan's flybys Crapeau, M. Rodriguez, S. Le mouelic, S. Paillou, Philippe Sotin, C. Wall, S. Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux (L3AB) Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Observatoire aquitain des sciences de l'univers (OASU) Laboratoire d'Astrophysique de Bordeaux Pessac (LAB) Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Berlin, Italy 2006 https://hal.archives-ouvertes.fr/hal-00129685 en eng HAL CCSD hal-00129685 https://hal.archives-ouvertes.fr/hal-00129685 BIBCODE: 2006epsc.conf.579C European Planetary Science Congress 2006. Berlin, Germany, 18 - 22 September 2006., p.579 https://hal.archives-ouvertes.fr/hal-00129685 European Planetary Science Congress 2006. Berlin, Germany, 18 - 22 September 2006., p.579, 2006, Berlin, Italy [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] info:eu-repo/semantics/conferenceObject Conference papers 2006 ftccsdartic 2021-12-26T00:39:53Z The altimeter mode of the Ku-band RADAR experiment onboard the Cassini-Huygens mission has been designed primarily for the study of Titan's surface topography. Inspired by what is done on the Earth in icy contexts like in the Antarctic, Cassini altimetry data can also be used to retrieve the radar reflectivity of Titan's surface and thus, information about its nature. Our first study shows clear contrasts of the radar reflectivity along the altimeter track acquired during the first Titan flyby (Ta). This distinct decrease in radar reflectivity is somewhat correlated with a slight surface height variation. The 13th Titan flyby (T13) provided us VIMS (Visual and Infrared Mapping Spectrometer, operating between 0.3 and 5.1 µm) medium resolution observations of the same region. Infrared I/F along the Ta altimeter track presents a very strong correlation with the computed radar reflectivity. These correlations between infrared I/F and radar reflectivity variations indicate a change in the surface nature and the presence of a clearly defined surface structure under the track. VIMS 2.03/1.27 µm channels ratio transect along the altimeter track also suggests a local enrichment in water ice associated with a smooth depression, maybe witnessing ancient channels. Conference Object Antarc* Antarctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic The Antarctic Titan ENVELOPE(-68.733,-68.733,-72.083,-72.083) |
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Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] |
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[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] Crapeau, M. Rodriguez, S. Le mouelic, S. Paillou, Philippe Sotin, C. Wall, S. CASSINI/altimeter and VIMS complementarity: example using observations over the same area from Ta and T13 Titan's flybys |
topic_facet |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] |
description |
The altimeter mode of the Ku-band RADAR experiment onboard the Cassini-Huygens mission has been designed primarily for the study of Titan's surface topography. Inspired by what is done on the Earth in icy contexts like in the Antarctic, Cassini altimetry data can also be used to retrieve the radar reflectivity of Titan's surface and thus, information about its nature. Our first study shows clear contrasts of the radar reflectivity along the altimeter track acquired during the first Titan flyby (Ta). This distinct decrease in radar reflectivity is somewhat correlated with a slight surface height variation. The 13th Titan flyby (T13) provided us VIMS (Visual and Infrared Mapping Spectrometer, operating between 0.3 and 5.1 µm) medium resolution observations of the same region. Infrared I/F along the Ta altimeter track presents a very strong correlation with the computed radar reflectivity. These correlations between infrared I/F and radar reflectivity variations indicate a change in the surface nature and the presence of a clearly defined surface structure under the track. VIMS 2.03/1.27 µm channels ratio transect along the altimeter track also suggests a local enrichment in water ice associated with a smooth depression, maybe witnessing ancient channels. |
author2 |
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux (L3AB) Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Observatoire aquitain des sciences de l'univers (OASU) Laboratoire d'Astrophysique de Bordeaux Pessac (LAB) Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Crapeau, M. Rodriguez, S. Le mouelic, S. Paillou, Philippe Sotin, C. Wall, S. |
author_facet |
Crapeau, M. Rodriguez, S. Le mouelic, S. Paillou, Philippe Sotin, C. Wall, S. |
author_sort |
Crapeau, M. |
title |
CASSINI/altimeter and VIMS complementarity: example using observations over the same area from Ta and T13 Titan's flybys |
title_short |
CASSINI/altimeter and VIMS complementarity: example using observations over the same area from Ta and T13 Titan's flybys |
title_full |
CASSINI/altimeter and VIMS complementarity: example using observations over the same area from Ta and T13 Titan's flybys |
title_fullStr |
CASSINI/altimeter and VIMS complementarity: example using observations over the same area from Ta and T13 Titan's flybys |
title_full_unstemmed |
CASSINI/altimeter and VIMS complementarity: example using observations over the same area from Ta and T13 Titan's flybys |
title_sort |
cassini/altimeter and vims complementarity: example using observations over the same area from ta and t13 titan's flybys |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.archives-ouvertes.fr/hal-00129685 |
op_coverage |
Berlin, Italy |
long_lat |
ENVELOPE(-68.733,-68.733,-72.083,-72.083) |
geographic |
Antarctic The Antarctic Titan |
geographic_facet |
Antarctic The Antarctic Titan |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
European Planetary Science Congress 2006. Berlin, Germany, 18 - 22 September 2006., p.579 https://hal.archives-ouvertes.fr/hal-00129685 European Planetary Science Congress 2006. Berlin, Germany, 18 - 22 September 2006., p.579, 2006, Berlin, Italy |
op_relation |
hal-00129685 https://hal.archives-ouvertes.fr/hal-00129685 BIBCODE: 2006epsc.conf.579C |
_version_ |
1766036342381215744 |