Filters








7 Hits in 4.8 sec

Calibrating the SAR SSH of Sentinel-3A and CryoSat-2 over the Corsica Facilities

Pascal Bonnefond, Olivier Laurain, Pierre Exertier, François Boy, Thierry Guinle, Nicolas Picot, Sylvie Labroue, Matthias Raynal, Craig Donlon, Pierre Féménias, Tommaso Parrinello, Salvatore Dinardo
2018 Remote Sensing  
Acknowledgments: This study was conducted and financed thanks to Centre National d'Etudes Spatiales (CNES), Centre National de la Recherche Scientifique (CNRS), and the French Ministry of Research.  ...  The present paper focuses on the calibration of both the Sentinel-3A and CryoSat-2 missions using the same facilities and similar data processing.  ...  The present paper focuses on the calibration of both the Sentinel-3A and CryoSat-2 missions using the same facilities and similar data processing.  ... 
doi:10.3390/rs10010092 fatcat:7rogvvgwsfeyhamzxctnb64lrm

The Roles of the S3MPC: Monitoring, Validation and Evolution of Sentinel-3 Altimetry Observations

Graham D. Quartly, Francesco Nencioli, Matthias Raynal, Pascal Bonnefond, Pablo Nilo Garcia, Albert Garcia-Mondéjar, Adrian Flores de la Cruz, Jean-Francois Cretaux, Nicolas Taburet, Marie-Laure Frery, Mathilde Cancet, Alan Muir (+13 others)
2020 Remote Sensing  
The altimeters on Sentinel-3A and -3B are the first to operate in delay-Doppler or SAR mode over all Earth surfaces, which enables better spatial resolution of the signal in the along-track direction and  ...  There are regular routine assessments of the instruments through investigation of telemetered housekeeping data, calibrations over selected sites and comparisons of geophysical retrievals with models,  ...  Acknowledgments: We are all grateful to Sylvie Labroue and Remko Scharroo for their involvement in S3MPC over the years, and were sorry that they did not have the time to contribute to this publication  ... 
doi:10.3390/rs12111763 fatcat:gdqccsmf45c7dmpf7z5u57wzzi

Ensuring that the Sentinel-3A altimeter provides climate-quality data

Graham Quartly, Francesco Nencioli, Sylvie Labroue, Pierre Femenias, Remko Scharroo, Saleh Abdalla, Pascal Bonnefond, Mathilde Cancet, Marie-laure Frery, Matthias Raynal, Steven Baker, Alan Muir (+10 others)
2017 Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017  
Sentinel-3A, launched in February 2016, is part of ESA's long-term commitment to climate monitoring from space.  ...  The Sentinel-3 Mission Performance Centre (S3MPC) has been developing the methodology to evaluate the accuracy of retrievals, monitor any changes and develop solutions to known problems.  ...  Thus, from the 10 currently available repeat passes off southwest Corsica, we conclude that SSH bias for Sentinel-3A is +11 ± 6 mm and -10 ± 9 mm for respectively SAR and PLRM.  ... 
doi:10.1117/12.2277593 fatcat:mwdyslsa4vgj7ezbkodr4r5tqm

The ESA Permanent Facility for Altimetry Calibration: Monitoring Performance of Radar Altimeters for Sentinel-3A, Sentinel-3B and Jason-3 Using Transponder and Sea-Surface Calibrations with FRM Standards

Stelios Mertikas, Achilleas Tripolitsiotis, Craig Donlon, Constantin Mavrocordatos, Pierre Féménias, Franck Borde, Xenophon Frantzis, Costas Kokolakis, Thierry Guinle, George Vergos, Ilias N. Tziavos, Robert Cullen
2020 Remote Sensing  
This work presents the latest calibration results for the Copernicus Sentinel-3A and -3B and the Jason-3 radar altimeters as determined by the Permanent Facility for Altimetry Calibration (PFAC) in west  ...  External and independent calibration and validation facilities provide an objective assessment of the altimeter's performance by comparing satellite observations with ground-truth and in-situ measurements  ...  Antonio Martellucci of the European Space Research and Technology Center of ESA in the Netherlands for all his help and support with the ESA radiometer.  ... 
doi:10.3390/rs12162642 fatcat:sv5uytkopvfmzh6fvtonjcrgzu

An Overview of Requirements, Procedures and Current Advances in the Calibration/Validation of Radar Altimeters

Graham D. Quartly, Ge Chen, Francesco Nencioli, Rosemary Morrow, Nicolas Picot
2021 Remote Sensing  
This special issue brings together 19 papers, with a focus on the recent missions (Jason-2, Jason-3, Sentinel-3A and HY-2B) as well as detailing the issues for anticipated future missions such as SWOT.  ...  Analysis of the radar echoes from a spaceborne altimeter gives information on sea surface height, wave height and wind speed, as well as other parameters over land and ice.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs13010125 fatcat:oxalyomb25frnavurtc7iuduyu

Absolute Calibration of the European Sentinel-3A Surface Topography Mission over the Permanent Facility for Altimetry Calibration in west Crete, Greece

Stelios Mertikas, Craig Donlon, Pierre Féménias, Constantin Mavrocordatos, Demitris Galanakis, Achilles Tripolitsiotis, Xenophon Frantzis, Costas Kokolakis, Ilias Tziavos, George Vergos, Thierry Guinle
2018 Remote Sensing  
The facility has been providing calibration services for more than 15 years for all past (i.e., Envisat, Jason-1, Jason-2, SARAL/AltiKa, HY-2A) and current (i.e., Sentinel-3A, Sentinel-3B, Jason-3) satellite  ...  The other Pass No.335 of Sentinel-3A descends from southwest of Crete to south and intersects the Gavdos calibration site.  ...  Many thanks to Joana Fernandes and Telmo Vieira, University of Porto, Portugal, for helping us better understand the wet troposphere delays and for verifying the produced results.  ... 
doi:10.3390/rs10111808 fatcat:ha723kjvrjf3tbe27fnxeot2iu

Report of the Ocean Surface Topography Science Team Meeting

Steigenberger Inselhotel
unpublished
CryoSat is seen as the precursor mission of Sentinel-3 and Sentinel-6 and fundamental for their development and for user ramp-up to SAR.  ...  The launch of Sentinel-3B is foreseen some 12-18 months after Sentinel-3A. About GOCE, the mission is accomplished but the exploitation continues.  ...  (March, 2015) and Jason-CS (2020) may not leave sufficient margin for cross calibration between missions, and further slips will jeopardize continuity of the sea level record.  ... 
fatcat:e2t2tio3w5ee7g34p3dpm2t5wi