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CAROLS: A New Airborne L-Band Radiometer for Ocean Surface and Land Observations ArchiMer
Zribi, Mehrez; Parde, Mickael; Boutin, Jacqueline; Fanise, Pascal; Hauser, Daniele; Dechambre, Monique; Kerr, Yann; Leduc-leballeur, Marion; Reverdin, Gilles; Skou, Niels; Sobjaerg, Sten; Albergel, Clement; Calvet, Jean Christophe; Wigneron, Jean Pierre; Lopez-baeza, Ernesto; Rius, Antonio; Tenerelli, Joseph.
The "Cooperative Airborne Radiometer for Ocean and Land Studies" (CAROLS) L-Band radiometer was designed and built as a copy of the EMIRAD II radiometer constructed by the Technical University of Denmark team. It is a fully polarimetric and direct sampling correlation radiometer. It is installed on board a dedicated French ATR42 research aircraft, in conjunction with other airborne instruments (C-Band scatterometer-STORM, the GOLD-RTR GPS system, the infrared CIMEL radiometer and a visible wavelength camera). Following initial laboratory qualifications, three airborne campaigns involving 21 flights were carried out over South West France, the Valencia site and the Bay of Biscay (Atlantic Ocean) in 2007, 2008 and 2009, in coordination with in situ field...
Tipo: Text Palavras-chave: Radiometer; CAROLS; L band; SMOS; Ocean salinity; Soil moisture.
Ano: 2011 URL: https://archimer.ifremer.fr/doc/00240/35118/33615.pdf
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GEROS-ISS: GNSS REflectometry, Radio Occultation, and Scatterometry Onboard the International Space Station ArchiMer
Wickert, Jens; Cardellach, Estel; Martin-neira, Manuel; Bandeiras, Jorge; Bertino, Laurent; Andersen, Ole Baltazar; Camps, Adriano; Catarino, Nuno; Chapron, Bertrand; Fabra, Fran; Floury, Nicolas; Foti, Giuseppe; Gommenginger, Christine; Hatton, Jason; Hoeg, Per; Jaggi, Adrian; Kern, Michael; Lee, Tong; Li, Zhijin; Park, Hyuk; Pierdicca, Nazzareno; Ressler, Gerhard; Rius, Antonio; Rosello, Josep; Saynisch, Jan; Soulat, Francois; Shum, C. K.; Semmling, Maximilian; Sousa, Ana; Xie, Jiping; Zuffada, Cinzia.
GEROS-ISS stands for GNSS REflectometry, radio occultation, and scatterometry onboard the International Space Station (ISS). It is a scientific experiment, successfully proposed to the European Space Agency in 2011. The experiment as the name indicates will be conducted on the ISS. The main focus of GEROS-ISS is the dedicated use of signals from the currently available Global Navigation Satellite Systems (GNSS) in L-band for remote sensing of the Earth with a focus to study climate change. Prime mission objectives are the determination of the altimetric sea surface height of the oceans and of the ocean surface mean square slope, which is related to sea roughness and wind speed. These geophysical parameters are derived using reflected GNSS signals (GNSS...
Tipo: Text Palavras-chave: Global Navigation Satellite Systems (GNSS) reflectometry; GNSS radio occultation; International space station; Mean sea level; Mesoscale ocean currents.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00359/47016/46973.pdf
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GNSS Transpolar Earth Reflectometry exploriNg System (G-TERN): Mission Concept ArchiMer
Cardellach, Estel; Wickert, Jens; Baggen, Rens; Benito, Javier; Camps, Adriano; Catarino, Nuno; Chapron, Bertrand; Dielacher, Andreas; Fabra, Fran; Flato, Greg; Fragner, Heinrich; Gabarro, Carolina; Gommenginger, Christine; Haas, Christian; Healy, Sean; Hernandez-pajares, Manuel; Hoeg, Per; Jaggi, Adrian; Kainulainen, Juha; Khan, Shfaqat Abbas; Lemke, Norbert M. K.; Li, Weiqiang; Nghiem, Son V.; Pierdicca, Nazzareno; Portabella, Marcos; Rautiainen, Kimmo; Rius, Antonio; Sasgen, Ingo; Semmling, Maximilian; Shum, C. K.; Soulat, Francois; Steiner, Andrea K.; Tailhades, Sebastien; Thomas, Maik; Vilaseca, Roger; Zuffada, Cinzia.
The global navigation satellite system (GNSS) Transpolar Earth Reflectometry exploriNg system (G-TERN) was proposed in response to ESA's Earth Explorer 9 revised call by a team of 33 multi-disciplinary scientists. The primary objective of the mission is to quantify at high spatio-temporal resolution crucial characteristics, processes and interactions between sea ice, and other Earth system components in order to advance the understanding and prediction of climate change and its impacts on the environment and society. The objective is articulated through three key questions. 1) In a rapidly changing Arctic regime and under the resilient Antarctic sea ice trend, how will highly dynamic forcings and couplings between the various components of the ocean,...
Tipo: Text Palavras-chave: Polar science; GNSS; Reflectometry; GNSS-R; Sea ice; Altimetry; Polarimetry; Radio-occultation; Low Earth Orbiter.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00438/54994/56411.pdf
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Sea surface state measured using GPS reflected signals - art. no. 2122 ArchiMer
Rius, Antonio; Aparicio, Josep; Cardellach, Estel; Martin Neira, Manuel; Chapron, Bertrand.
We discuss an airborne experiment aimed to establish the potential of the PARIS concept (PAssive Reflectometry and Interferometry System) to retrieve small features in the sea surface topography. The date and location were chosen to coincide with a TOPEX/POSEIDON (T/P) overflight. The signals of the Global Positioning System (GPS) reflected off the sea surface are tracked and compared to the directly received ones, to compute the relative delays. The features detected in the peak tracking are likely caused by topographic and sea roughness variations. While very promising, these results open the challenge to use additional information to appropriately separate both contributions.
Tipo: Text Palavras-chave: Signal analysis; Reflectrometry; Inerferometry; Sea surface topography.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/2002/publication-766.pdf
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The mosaic of habitats of the Seine estuary: Insights from food-web modelling and network analysis ArchiMer
Tecchio, Samuele; Rius, Antonio; Dauvin, Jean-claude; Lobry, Jeremy; Lassalle, Geraldine; Morin, Jocelyne; Bacq, Nicolas; Cachera, Marie; Chaalali, Aurelie; Villanueva, Ching-maria; Niquil, Nathalie.
Ecological network analysis was applied in the Seine estuary ecosystem, northern France, integrating ecological data from the years 1996 to 2002. The Ecopath with Ecosim (EwE) approach was used to model the trophic flows in 6 spatial compartments leading to 6 distinct EwE models: the navigation channel and the two channel flanks in the estuary proper, and 3 marine habitats in the eastern Seine Bay. Each model included 12 consumer groups, 2 primary producers, and one detritus group. Ecological network analysis was performed, including a set of indices, keystoneness, and trophic spectrum analysis to describe the contribution of the 6 habitats to the Seine estuary ecosystem functioning. Results showed that the two habitats with a functioning most related to a...
Tipo: Text Palavras-chave: Trophic network; Estuary; Ecological network analysis; Ecopath with Ecosim; Food web; Ecosystem health indicators.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00270/38154/42026.pdf
Registros recuperados: 5
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