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Investigating the Performance of Four Empirical Cross-Calibration Methods for the Proposed SWOT Mission

Gerald Dibarboure, Clement Ubelmann
2014 Remote Sensing  
In general, the so-called direct method (using a single SWOT image) yields better coverage and smaller calibrated roll residuals because the full extent of the swath can be used for calibration, but this  ...  method makes an extensive use of the external nadir constellation to separate roll from oceanic variability, and it is more prone to leakages from oceanic variability on roll (i.e., true topography signal  ...  Author Contributions Gerald Dibarboure developed the roll calibration with four inverse methods, processed input model snapshots and nadir constellation snapshots, and carried out performance estimations  ... 
doi:10.3390/rs6064831 fatcat:m2n54bcjbjeenjuxrfpnryn67u

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  
Because of that, the importance of regular and precise calibration and validation ("cal/val") remains undiminished, especially with efforts to merge altimetric records from multiple missions spanning different  ...  Since then, there have been about 20 further missions, with several advances in the sophistication of hardware and complexity of processing with the aim of increased accuracy and precision.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs13010125 fatcat:oxalyomb25frnavurtc7iuduyu

Exploring the Benefits of UsingCryoSat-2's Cross-Track Interferometry to Improve the Resolution of Multisatellite Mesoscale Fields

G. Dibarboure, P. Y. Le Traon, N. Galin
2013 Journal of Atmospheric and Oceanic Technology  
measurements if the SARin error is significantly reduced in the future, and in particular in the context of a prospective SARin demonstrator optimized for oceanography.  ...  Although only limited experiments might be possible with the error level of current CryoSat-2 data, this paper shows the potential of the SAR interferometry technology to reduce the anisotropy of altimeter  ...  of coherent SWOT errors using external references 568 and the altimetry constellation, Transactions on Geoscience and Remote Sensing (in press, 569 10.1109/TGRS.2011.2171976) 570 o Dibarboure.G., Renaudie.C  ... 
doi:10.1175/jtech-d-12-00156.1 fatcat:po3gc2mv5jcllnyykz6a43okii

GEROS-ISS: GNSS REflectometry, Radio Occultation, and Scatterometry Onboard the International Space Station

Jens Wickert, Estel Cardellach, Manuel Martin-Neira, Jorge Bandeiras, Laurent Bertino, Ole Baltazar Andersen, Adriano Camps, Nuno Catarino, Bertrand Chapron, Fran Fabra, Nicolas Floury, Giuseppe Foti (+19 others)
2016 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
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  ...  Secondary mission goals include atmosphere/ionosphere sounding using refracted GNSS signals (radio occultation, GNSS-RO) and remote sensing of land surfaces using GNSS-R.  ...  The altimetric error increases with wind speed and the cross-track distance from the nadir.  ... 
doi:10.1109/jstars.2016.2614428 fatcat:7zfmpvdb2fhu3aj5wfcvwwghza

Validating a new GNSS-based sea level instrument (CalNaGeo) at Senetosa Cape

Pascal Bonnefond, Olivier Laurain, Pierre Exertier, Michel Calzas, Thierry Guinle, Nicolas Picot, the FOAM project Team
2021 Marine Geodesy  
This has been undertaken using the well-defined geodetic infrastructure deployed at Senetosa Cape, and involved the estimation of the stability of the waterline (and thus the instantaneous separation of  ...  The geodetic Corsica site was set up in 1998 in order to perform altimeter calibration of the TOPEX/Poseidon (T/P) mission and subsequently, Jason-1, OSTM/Jason-2, Jason-3 and more recently Sentinel-6  ...  Special thanks to Claude Gaillemin who takes care of all the instruments at Cape Senetosa since 1998 and performs the deployments of the GNSS-based systems for sea level measurements.  ... 
doi:10.1080/01490419.2021.2013355 fatcat:yzzgetsqfnba7m6qg7mw673hua

Amazon hydrology from space: scientific advances and future challenges

Alice César Fassoni‐Andrade, Ayan Santos Fleischmann, Fabrice Papa, Rodrigo Cauduro Dias de Paiva, Sly Wongchuig, John M. Melack, Adriana Aparecida Moreira, Adrien Paris, Anderson Ruhoff, Claudio Barbosa, Daniel Andrade Maciel, Evlyn Novo (+11 others)
2021 Reviews of Geophysics  
Here, we review major studies and the various techniques using satellite RS in the Amazon.  ...  We review the strengths and limitations of observations from satellites in the context of the current and upcoming hydrology-oriented satellite missions, and we make recommendations for improving satellite  ...  Acknowledgments The authors thank Paul Bates from the University of Bristol and two other  ... 
doi:10.1029/2020rg000728 fatcat:6f6vqdhsibhxpdapfyj37udvni

2012 Index IEEE Transactions on Geoscience and Remote Sensing Vol. 50

2012 IEEE Transactions on Geoscience and Remote Sensing  
., +, TGRS July 2012 2630-2638 Error analysis Empirical Cross-Calibration of Coherent SWOT Errors Using External References and the Altimetry Constellation.  ...  ., +, TGRS March 2012 758-768 Empirical Cross-Calibration of Coherent SWOT Errors Using External Ref- erences and the Altimetry Constellation.  ...  Radar resolution A Novel Method for Imaging of Group Targets Moving in a Formation. Bai, X., +, TGRS Jan. 2012  ... 
doi:10.1109/tgrs.2012.2229656 fatcat:hjrotpfsqzhxlnnme27ftv33cu

GNSS Transpolar Earth Reflectometry exploriNg System (G-TERN): Mission Concept

Estel Cardellach, Jens Wickert, Rens Baggen, Javier Benito, Adriano Camps, Nuno Catarino, Bertrand Chapron, Andreas Dielacher, Fran Fabra, Greg Flato, Heinrich Fragner, Carolina Gabarro (+24 others)
2018 IEEE Access  
advance the understanding and prediction of climate change and its impacts on the environment and society.  ...  the various components of the ocean, atmosphere, and cryosphere modify or influence the processes governing the characteristics of the sea ice cover (ice production, growth, deformation, and melt)?  ...  ACKNOWLEDGMENTS The authors would like to thank SSTL for providing GNSS-R data acquired from the TDS-1 mission that have been used in this study.  ... 
doi:10.1109/access.2018.2814072 fatcat:mkvkjscl7rc37fk4pjmkz4ucb4

Observing Sea States

Fabrice Ardhuin, Justin E. Stopa, Bertrand Chapron, Fabrice Collard, Romain Husson, Robert E. Jensen, Johnny Johannessen, Alexis Mouche, Marcello Passaro, Graham D. Quartly, Val Swail, Ian Young
2019 Frontiers in Marine Science  
In situ and satellite observations are particularly critical for the correction and calibration of significant wave heights to ensure the stability of model time series.  ...  Finally, sea state patterns can reveal the intensity of storms and associated climate patterns at large scales, and the intensity of currents at small scales.  ...  ACKNOWLEDGMENTS We acknowledge the acquisition, processing and dissemination of sea state data by many organizations including NASA, CNES, ESA, EUMETSAT, NOAA, CDIP, Environment and Climate Change Canada  ... 
doi:10.3389/fmars.2019.00124 fatcat:4dviyqzewffgxbocuvgsghz3eu

Remote Sensing Systems for Ocean: A Review (Part 2: Active Systems)

Meisam Amani, Farzaneh Mohseni, Nasir Farsad Layegh, Mohsen Eslami Nazari, Farzam Fatolazadeh, Abbas Salehitangrizi, Seyed Ali Ahmadi, Hamid Ebrahimy, Arsalan Ghorbanian, Shuanggen Jin, Sahel Mahdavi, Armin Moghimi
2022 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
This review paper provides useful information to all students and researchers who are interested in the oceanographic applications of active RS systems.  ...  Part 1 of this review paper was dedicated to reviewing passive RS systems and their main applications in the ocean.  ...  The constellation of Small Satellites for Mediterranean basin Observation (COSMO-SkyMed) is a constellation of four platforms, developed by the Agenzia Spaziale Italiana (ASI), and funded and managed by  ... 
doi:10.1109/jstars.2022.3141980 fatcat:kc55frb76nbtfkkfabvhbtflem

Measuring Global Ocean Heat Content to Estimate the Earth Energy Imbalance

Benoit Meyssignac, Tim Boyer, Zhongxiang Zhao, Maria Z. Hakuba, Felix W. Landerer, Detlef Stammer, Armin Köhl, Seiji Kato, Tristan L'Ecuyer, Michael Ablain, John Patrick Abraham, Alejandro Blazquez (+25 others)
2019 Frontiers in Marine Science  
Precise monitoring of EEI is critical to assess the current status of climate change and the future evolution of climate.  ...  But the monitoring of EEI is challenging as EEI is two orders of magnitude smaller than the radiation fluxes in and out of the Earth system.  ...  GO-SHIP and OceanSITE records, which are post calibrated and of high quality, are essential points of cross-reference for Argo.  ... 
doi:10.3389/fmars.2019.00432 fatcat:eq5kksblrza5lp3mq2br42yrym

Integrated Observations of Global Surface Winds, Currents, and Waves: Requirements and Challenges for the Next Decade

Ana B. Villas Bôas, Fabrice Ardhuin, Alex Ayet, Mark A. Bourassa, Peter Brandt, Betrand Chapron, Bruce D. Cornuelle, J. T. Farrar, Melanie R. Fewings, Baylor Fox-Kemper, Sarah T. Gille, Christine Gommenginger (+14 others)
2019 Frontiers in Marine Science  
This paper reviews the present state of observations of surface winds, currents, and waves, and it outlines observational gaps that limit our current understanding of coupled processes that happen at the  ...  Ocean surface winds, currents, and waves play a crucial role in exchanges of momentum, energy, heat, freshwater, gases, and other tracers between the ocean, atmosphere, and ice.  ...  ACKNOWLEDGMENTS The authors thank the two reviewers for their comments and suggestions.  ... 
doi:10.3389/fmars.2019.00425 fatcat:byow2vu7snbx3orzoe573epiqu

DopSCAT: A mission concept for simultaneous measurements of marine winds and surface currents

Franco Fois, Peter Hoogeboom, François Le Chevalier, Ad Stoffelen, Alexis Mouche
2015 Journal of Geophysical Research - Oceans  
For the determination of ocean currents, in particular, the novel idea of using two chirps of opposite slope is introduced.  ...  This paper proposes a mission concept for the measurement of both oceanic winds and surface currents, which makes full use of earlier C-band radar remote sensing experience.  ...  Acknowledgments The present work was funded by RHEA System S. A. and  ... 
doi:10.1002/2015jc011011 fatcat:4jo23wtzjfe7fawqkz22cbnr7m

Ocean Surface Topography Science Team Meeting

Reston Reston
But the present altimeter constellation is barely adequate to map very short scales signals. The results show strong interest of this internal tide empirical atlas to correct altimetry.  ...  of processes which lead to loss of coherency of IW. o A CNES SWOT study (L.  ...  Further study and consideration of future launches and the overall health of the altimeter constellation, by both the Projects and the OSTST Jason-2 EoL subgroup, is recommended to find precise criteria  ... 

Report of the Ocean Surface Topography Science Team Meeting

Steigenberger Inselhotel
While the original HY2A data are negatively impacted by a variety of errors (e.g., USO drift, ground processing errors), cross-calibration with the reference Jason-2 mission is capable of significantly  ...  Estimated empirical accelerations when using the standard GDR-D configuration for Jason-2 (left) and when using the new calibrated SRP model (right).  ...  of non-coherent Internal Waves and checking the noise level.  ... 
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