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7 results on '"De Witte, Erik"'

1. Synthetic RAW data generator for ESA HARMONY mission

Author

Monnier, Goulven, Camus, Benjamin, Hellouvry, Yann-Hervé, Dubois, Pierre, and de Witte, Erik

Subjects
Physics - Geophysics
Abstract

In this paper, we introduce HEEPS/MARE, the end-to-end simulator developed for the SAR oceanographic products of ESA Earth Explorer 10 mission, Harmony, expected to launch in Decembre 2029. Harmony is primarily dedicated to the observation of small-scale motion and deformation fields of the Earth surface (oceans, glaciers and ice sheets, solid Earth), thanks to passive SAR/ATI receivers carried by two companion satellites for Sentinel-1. The paper focuses on the raw data generator designed to efficiently simulate large, heterogeneous, moving oceanic areas and produce the acquired SAR/ATI bistatic IQ signals. The heterogeneous sea-surface model, bistatic scattering model, multi-GPU implementation and achieved performance are emphasized. Finally, sample results are presented, to illustrate the ability of Harmony to map wind and surface current vectors at kilometric scale.

Published
2024

2. SKIM, a Candidate Satellite Mission Exploring Global Ocean Currents and Waves

Author

Ardhuin, Fabrice, Brandt, Peter, Gaultier, Lucile, Donlon, Craig, Battaglia, Alessandro, Boy, Francois, Casal, Tania, Chapron, Bertrand, Collard, Fabrice, Cravatte, Sophie, Delouis, Jean-Marc, De Witte, Erik, Dibarboure, Gerald, Engen, Geir, Johnsen, Harald, Lique, Camille, Lopez-Dekker, Paco, Maes, Christophe, Martin, Adrien, Marie, Louis, Menemenlis, Dimitris, Nouguier, Frederic, Peureux, Charles, Rampal, Pierre, Ressler, Gerhard, Rio, Marie-Helene, Rommen, Bjorn, Shutler, Jamie D., Suess, Martin, Tsamados, Michel, Ubelmann, Clement, van Sebille, Erik, van den Oever, Martin, Stammer, Detlef, Sub Physical Oceanography, Marine and Atmospheric Research, Sub Physical Oceanography, Marine and Atmospheric Research, Laboratoire d'Océanographie Physique et Spatiale (LOPS), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), OceanDataLab, European Space Research and Technology Centre (ESTEC), Agence Spatiale Européenne = European Space Agency (ESA), Centre National d'Études Spatiales [Toulouse] (CNES), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Institut de Recherche pour le Développement (IRD), Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), National Oceanography Centre [Southampton] (NOC), University of Southampton, Centre for Polar Observation & Modelling, University College of London [London] (UCL), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Grantham Institute for Climate Change and the Environment, Imperial College London, ISBlue - Interdisciplinary Graduate School for the Blue planet (2017), ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), ODL - OceanDataLab, European Space Agency (ESA), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), and Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)

Subjects
0106 biological sciences, lcsh:QH1-199.5, 010504 meteorology & atmospheric sciences, BUDGET, Oceanography, 01 natural sciences, 7. Clean energy, remote sensing, Arctic, ocean waves, altimetry, Wind wave, SPACE, WATER, Marine & Freshwater Biology, lcsh:Science, Delta-k interferometry, Physics::Atmospheric and Oceanic Physics, Water Science and Technology, Global and Planetary Change, Doppler centroid, IN-SITU, ocean current, Doppler, SEA-SURFACE KINEMATICS, Life Sciences & Biomedicine, Meteorology, CIRCULATION, Ocean Engineering, VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452, Environmental Sciences & Ecology, Sea state, lcsh:General. Including nature conservation, geographical distribution, Aquatic Science, tropics, Altimetry, Ocean current, Radar, Remote sensing, VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452, 14. Life underwater, Altimeter, Rogue wave, Sea ice concentration, 0105 earth and related environmental sciences, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Science & Technology, 010604 marine biology & hydrobiology, Scatterometer, VELOCITY, TRANSPORT, Boundary current, MODEL, 13. Climate action, MIXED-LAYER HEAT, Environmental science, lcsh:Q, sea state, Environmental Sciences
Abstract

The Sea surface KInematics Multiscale monitoring (SKIM) satellite mission is designed to explore ocean surface current and waves. This includes tropical currents, notably the poorly known patterns of divergence and their impact on the ocean heat budget, and monitoring of the emerging Arctic up to 82.5°N. SKIM will also make unprecedented direct measurements of strong currents, from boundary currents to the Antarctic circumpolar current, and their interaction with ocean waves with expected impacts on air-sea fluxes and extreme waves. For the first time, SKIM will directly measure the ocean surface current vector from space. The main instrument on SKIM is a Ka-band conically scanning, multi-beam Doppler radar altimeter/wave scatterometer that includes a state-of-the-art nadir beam comparable to the Poseidon-4 instrument on Sentinel 6. The well proven Doppler pulse-pair technique will give a surface drift velocity representative of the top meter of the ocean, after subtracting a large wave-induced contribution. Horizontal velocity components will be obtained with an accuracy better than 7 cm/s for horizontal wavelengths larger than 80 km and time resolutions larger than 15 days, with a mean revisit time of 4 days for of 99% of the global oceans. This will provide unique and innovative measurements that will further our understanding of the transports in the upper ocean layer, permanently distributing heat, carbon, plankton, and plastics. SKIM will also benefit from co-located measurements of water vapor, rain rate, sea ice concentration, and wind vectors provided by the European operational satellite MetOp-SG(B), allowing many joint analyses. SKIM is one of the two candidate satellite missions under development for ESA Earth Explorer 9. The other candidate is the Far infrared Radiation Understanding and Monitoring (FORUM). The final selection will be announced by September 2019, for a launch in the coming decade. Copyright © 2019 Ardhuin, Brandt, Gaultier, Donlon, Battaglia, Boy, Casal, Chapron, Collard, Cravatte, Delouis, De Witte, Dibarboure, Engen, Johnsen, Lique, Lopez-Dekker, Maes, Martin, Marié, Menemenlis, Nouguier, Peureux, Rampal, Ressler, Rio, Rommen, Shutler, Suess, Tsamados, Ubelmann, van Sebille, van den Oever and Stammer. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY).

Published
2019
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3. SKIM, a Candidate Satellite Mission Exploring Global Ocean Currents and Waves

Author

Sub Physical Oceanography, Marine and Atmospheric Research, Ardhuin, Fabrice, Brandt, Peter, Gaultier, Lucile, Donlon, Craig, Battaglia, Alessandro, Boy, Francois, Casal, Tania, Chapron, Bertrand, Collard, Fabrice, Cravatte, Sophie, Delouis, Jean-Marc, De Witte, Erik, Dibarboure, Gerald, Engen, Geir, Johnsen, Harald, Lique, Camille, Lopez-Dekker, Paco, Maes, Christophe, Martin, Adrien, Marie, Louis, Menemenlis, Dimitris, Nouguier, Frederic, Peureux, Charles, Rampal, Pierre, Ressler, Gerhard, Rio, Marie-Helene, Rommen, Bjorn, Shutler, Jamie D., Suess, Martin, Tsamados, Michel, Ubelmann, Clement, van Sebille, Erik, van den Oever, Martin, Stammer, Detlef, Sub Physical Oceanography, Marine and Atmospheric Research, Ardhuin, Fabrice, Brandt, Peter, Gaultier, Lucile, Donlon, Craig, Battaglia, Alessandro, Boy, Francois, Casal, Tania, Chapron, Bertrand, Collard, Fabrice, Cravatte, Sophie, Delouis, Jean-Marc, De Witte, Erik, Dibarboure, Gerald, Engen, Geir, Johnsen, Harald, Lique, Camille, Lopez-Dekker, Paco, Maes, Christophe, Martin, Adrien, Marie, Louis, Menemenlis, Dimitris, Nouguier, Frederic, Peureux, Charles, Rampal, Pierre, Ressler, Gerhard, Rio, Marie-Helene, Rommen, Bjorn, Shutler, Jamie D., Suess, Martin, Tsamados, Michel, Ubelmann, Clement, van Sebille, Erik, van den Oever, Martin, and Stammer, Detlef

Published
2019

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