Results 91 to 100 of about 4,330 (196)

Selection of the key earth observation sensors and platforms focusing on applications for Polar Regions in the scope of Copernicus system 2020-2030 [PDF]

, 2019
An optimal payload selection conducted in the frame of the H2020 ONION project (id 687490) is presented based on the ability to cover the observation needs of the Copernicus system in the time period 2020–2030.
Camps Carmona, Adriano José, Cote, Judith, Hyuk, Park, Lancheros Sepulveda, Estefany Maria, Pierotti, Stéphane, Rodríguez, Pedro, Tonetti, Stefania   +6 more
core   +2 more sources

Uncertainties in Arctic sea ice thickness and volume: new estimates and implications for trends [PDF]

, 2013
Sea ice volume has decreased in the last decades, evoked by changes in sea ice area and thickness. Estimates of sea ice area and thickness rely on a number of geophysical parameters which introduce large uncertainties.
L. H. Smedsrud, M. Zygmuntowska, N. Ivanova, P. Rampal   +3 more
core   +4 more sources

Detecting Sea Ice Leads and Floes in the Northwest Passage Using CryoSat-2

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Knowledge of sea ice lead and floe density is important for ship navigation, understanding ice pack dynamics, and mapping primary productivity. Furthermore, reliable lead and floe discrimination is essential for the calculation of sea ice freeboard and ...
Amy E. Swiggs, Isobel R. Lawrence, Andy Ridout, Andrew Shepherd   +3 more
doaj   +1 more source

Evaluation of new CryoSat-2 products over the ocean

Remote Sensing of Environment, 2017
The CryoSat-2 satellite, primarily dedicated to precise monitoring of the Cryosphere, is demonstrating its capability to provide valuable altimetric data also over the ocean. Here we present the results of a global assessment and validation of the new Geophysical Ocean Product (GOP) distributed by the European Space Agency (ESA) since April 2014 ...
Calafat, F.M., Cipollini, P., Bouffard, J., Snaith, H., Féménias, P.   +4 more
openaire   +5 more sources

High-Resolution Mass Trends of the Antarctic Ice Sheet through a Spectral Combination of Satellite Gravimetry and Radar Altimetry Observations

Remote Sensing, 2019
Time-variable gravity measurements from the Gravity Recovery and Climate Experiment (GRACE) and GRACE-Follow On (GRACE-FO) missions and satellite altimetry measurements from CryoSat-2 enable independent mass balance estimates of the Earth’s ...
Ingo Sasgen, Hannes Konrad, Veit Helm, Klaus Grosfeld   +3 more
doaj   +1 more source

Increased ice losses from Antarctica detected by CryoSat-2

Geophysical Research Letters, 2014
We use 3years of Cryosat-2 radar altimeter data to develop the first comprehensive assessment of Antarctic ice sheet elevation change. This new data set provides near-continuous (96%) coverage of the entire continent, extending to within 215 km of the South Pole and leading to a fivefold increase in the sampling of coastal regions where the vast ...
McMillan, M, Shepherd, A, Sundal, A, Briggs, K, Muir, A, Ridout, A, Hogg, A, Wingham, D   +7 more
openaire   +2 more sources

Evaluation of Operation IceBridge quick-look snow depth estimates on sea ice [PDF]

, 2015
We evaluate Operation IceBridge (OIB) ‘quick-look’ (QL) snow depth on sea ice retrievals using in situ measurements taken over immobile first-year ice (FYI) and multi-year ice (MYI) during March of 2014. Good agreement was found over undeformed FYI (-4.5
Beckers, Justin, Derksen, Chris, Haas, Christian, Howell, Stephen, King, Joshua, Kurtz, Nathan, Richter-Menge, Jacqueline, Rutter, Nick, Toose, Peter   +8 more
core   +1 more source

Bayesian Estimation of Smooth Altimetric Parameters: Application to Conventional and Delay/Doppler Altimetry [PDF]

, 2015
International audienceThis paper proposes a new Bayesian strategy for the smooth estimation of altimetric parameters. The altimetric signal is assumed to be corrupted by a thermal and speckle noise distributed according to an independent and non ...
Halimi, Abderrahim, Mailhes, Corinne, Snoussi, Hichem, Tourneret, Jean-Yves   +3 more
core   +4 more sources

A new phase in the production of quality-controlled sea level data [PDF]

, 2017
Sea level is an essential climate variable (ECV) that has a direct effect on many people through inundations of coastal areas, and it is also a clear indicator of climate changes due to external forcing factors and internal climate variability.
A. Cazenave, A. Cazenave, G. D. Quartly, J. Benveniste, J.-C. Poisson, J.-F. Legeais, L. Carrère, L. Zawadzki, M. Ablain, M. J. Fernandes, M. J. Fernandes, O. B. Andersen, P. Cipollini, P. N. García, S. Mbajon Njiche, S. Rudenko, S. Rudenko   +16 more
core   +1 more source

Modèle semi-analytique pour l'altimétrie SAR/Doppler sur océan [PDF]

, 2013
National audienceLe concept de radar altimétrique SAR/Doppler est apparu au milieu des années 90. Cette technologie permet de réduire le bruit de mesure (par augmentation du nombre d’observations) et d’augmenter la résolution le long de la trace (along ...
Boy, François, Halimi, Abderrahim, Mailhes, Corinne, Moreau, Thomas, Tourneret, Jean-Yves   +4 more
core   +1 more source