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Altimetry for the future: Building on 25 years of progress

Saleh Abdalla 1 Abdolnabi Abdeh Kolahchi 2 Michaël Ablain Susheel Adusumilli 3 Suchandra Aich Bhowmick 4 Eva Alou-Font Laiba Amarouche 5 Ole Baltazar Andersen 6 Helena Antich 7 Lotfi Aouf 8 Brian Arbic 9 Thomas Armitage 10 Sabine Arnault 11 Camila Artana 12 Giuseppe Aulicino 13 Nadia Ayoub 14 Sergei Badulin 15 Steven Baker 16 Chris Banks 17 Lifeng Bao 18 Silvia Barbetta 19 Bàrbara Barceló-Llull 7 François Barlier 20 Sujit Basu 4 Peter Bauer-Gottwein 21 Matthias Becker 22 Brian Beckley Nicole Bellefond 23 Tatyana Belonenko 24 Mounir Benkiran 12 Touati Benkouider 25 Ralf Bennartz 26 Jérôme Benveniste 27 Nicolas Bercher Muriel Berge-Nguyen 14 Joao Bettencourt 28 Fabien Blarel 14 Alejandro Blazquez 14 Denis Blumstein 14 Pascal Bonnefond 29 Franck Borde 30 Jérôme Bouffard 27 François Boy 23 Jean-Paul Boy 31 Cédric Brachet 32 Pierre Brasseur 33 Alexander Braun 34 Luca Brocca 19 David Brockley 16 Laurent Brodeau 35 Shannon Brown 10 Sean Bruinsma 23, 36 Anna Bulczak 37 Sammie Buzzard 38 Madeleine Cahill 39 Stéphane Calmant 14 Michel Calzas 32 Stefania Camici 19 Mathilde Cancet 40 Hugues Capdeville 5 Claudia Cristina Carabajal 41 Loren Carrere 5 Anny Cazenave 14, 42 Eric Chassignet 43 Prakash Chauhan 44 Selma Cherchali 23 Teresa Chereskin 3 Cecile Cheymol 23 Daniele Ciani 45 Paolo Cipollini 46 Francesca Cirillo 47 Emmanuel Cosme 33 Steve Coss 48 Yuri Cotroneo 13 David Cotton 49 Alexandre Couhert 23 Sophie Coutin-Faye 23 Jean-François Crétaux 14, 23 Frédéric Cyr 50 Francesco d'Ovidio 51 José Darrozes 36 Cedric David 10 Nadim Dayoub 17 Danielle de Staerke 23 Xiaoli Deng 52 Shailen Desai 10 Jean-Damien Desjonqueres 10 Denise Dettmering 53 Alessandro Di Bella 6 Lara Díaz-Barroso 54 Gerald Dibarboure 23 Habib Boubacar Dieng 14 Salvatore Dinardo 5 Henryk Dobslaw 55 Guillaume Dodet 56 Andrea Doglioli 57 Alessio Domeneghetti 58 David Donahue 59 Shenfu Dong 60 Craig Donlon 30 Joël Dorandeu Christine Drezen 32 Mark Drinkwater 30 Yves Du Penhoat 14 Brian Dushaw Alejandro Egido Svetlana Erofeeva 61 Philippe Escudier Saskia Esselborn 55 Pierre Exertier 36 Ronan Fablet 62, 63, 64 Cédric Falco 65 Sinead Louise Farrell 66 Yannice Faugere 5 Pierre Femenias 27 Luciana Fenoglio 67 Joana Fernandes 68 Juan Gabriel Fernández 68 Pascale Ferrage 23 Ramiro Ferrari 69 Lionel Fichen 32 Paolo Filippucci Stylianos Flampouris Sara Fleury 14 Marco Fornari Rene Forsberg 6 Frédéric Frappart 14 Marie-Laure Frery 5 Pablo Garcia Albert Garcia-Mondejar Julia Gaudelli 16 Lucile Gaultier Augusto Getirana Ferran Gibert Artur Gil Lin Gilbert 16 Sarah Gille Luisella Giulicchi 30 Jesús Gómez-Enri Laura Gómez-Navarro 33 Christine Gommenginger 17 Lionel Gourdeau 14 David Griffin Andreas Groh 70 Alexandre Guerin 23 Raul Guerrero 71 Thierry Guinle 23 Praveen Gupta Benjamin Gutknecht Mathieu Hamon Guoqi Han 72 Danièle Hauser 73 Veit Helm Stefan Hendricks Fabrice Hernandez Anna Hogg Martin Horwath Martina Idžanović Peter Janssen Eric Jeansou 40 Yongjun Jia Yuanyuan Jia Liguang Jiang 21 Johnny Johannessen Masafumi Kamachi Svetlana Karimova Kathryn Kelly Sung Yong Kim 74 Robert King Cecile M.M. Kittel 21 Patrice Klein 75 Anna Klos Per Knudsen 6 Rolf Koenig 55 Andrey Kostianoy 15 Alexei Kouraev 14 Raj Kumar Sylvie Labroue 5 Loreley Selene Lago Juliette Lambin 23 Léa Lasson 14 Olivier Laurain Rémi Laxenaire 43 Clara Lázaro 68 Sophie Le Gac 23 Julien Le Sommer 33 Pierre-Yves Le Traon Sergey Lebedev Fabien Léger 14 Benoı̂t Legresy Frank Lemoine Luc Lenain Eric Leuliette Marina Levy 51 John Lillibridge Jianqiang Liu W. Llovel 56 Florent Lyard 14 Claire Macintosh Eduard Makhoul Varona Cécile Manfredi 23 Frédéric Marin 14 Evan Mason 7 Christian Massari Constantin Mavrocordatos 30 Nikolai Maximenko Malcolm Mcmillan Thierry Medina 23 Angelique Melet Marco Meloni Stelios Mertikas Sammy Metref 33 Benoit Meyssignac 14, 23 Jean-François Minster Thomas Moreau 5 Daniel Moreira Yves Morel 14 Rosemary Morrow 14 John Moyard 23 Sandrine Mulet 5 Marc Naeije Robert Steven Nerem Hans Ngodock Karina Nielsen 6 Jan Even Øie Nilsen Fernando Niño 14 Carolina Nogueira Loddo Camille Noûs Estelle Obligis Inès Otosaka Michiel Otten Berguzar Oztunali Ozbahceci Roshin P. Raj Rodrigo Paiva Guillermina Paniagua 69 Fernando Paolo 10 Adrien Paris Ananda Pascual 7 Marcello Passaro 53 Stephan Paul Tamlin Pavelsky Christopher Pearson Thierry Penduff 33 Fukai Peng 52 Felix Perosanz 23 Nicolas Picot 23 Fanny Piras 5 Valerio Poggiali Étienne Poirier Sonia Ponce de León 28 Sergey Prants Catherine Prigent 76 Christine Provost 77 M-Isabelle Pujol 5 Bo Qiu Yves Quilfen 56 Ali Rami R. Keith Raney Matthias Raynal Elisabeth Remy Frédérique Rémy 14 Marco Restano Annie Richardson 10 Donald Richardson Robert Ricker Martina Ricko Eero Rinne Stine Kildegaard Rose 6 Vinca Rosmorduc 5 Sergei Rudenko 53 Simón Ruiz 7 Barbara Ryan Corinne Salaün Antonio Sanchez-Roman 7 Louise Sandberg Sørensen 6 David Sandwell Martin Saraceno Michele Scagliola Philippe Schaeffer 5 Martin Scharffenberg Remko Scharroo Andreas Schiller Raphael Schneider Christian Schwatke 53 Andrea Scozzari Enrico Ser-Giacomi F. Seyler Rashmi Shah 10 Rashmi Sharma Andrew Shaw Andrew Shepherd Jay Shriver C.K. Shum Wim Simons Sebatian Simonsen 6 Thomas Slater Walter Smith Saulo Soares Mikhail Sokolovskiy Laurent Soudarin 5 Ciprian Spatar Sabrina Speich Margaret Srinivasan 10 Meric Srokosz 17 Emil Stanev Joanna Staneva Nathalie Steunou 23 Julienne Stroeve 38 Bob Su Yohanes Budi Sulistioadi Debadatta Swain Annick Sylvestre-Baron 23 Nicolas Taburet 5 Rémi Tailleux Katsumi Takayama Byron Tapley Angelica Tarpanelli Gilles Tavernier 23 Laurent Testut 14 Praveen Thakur Pierre Thibaut Luanne Thompson Joaquín Tintoré Céline Tison 23 Cédric Tourain 23 Jean Tournadre 56 Bill Townsend Ngan Tran 5 Sébastien Trilles Michel Tsamados 38 Kuo-Hsin Tseng Clément Ubelmann Bernd Uebbing Oscar Vergara 14 Jacques Verron 33 Telmo Vieira 68 Stefano Vignudelli Nadya Vinogradova Shiffer Pieter Visser Frederic Vivier 51 Denis Volkov Karina von Schuckmann Valerii Vuglinskii Pierrik Vuilleumier 30 Blake Walter 78 Jida Wang 78 Chao Wang 79 Christopher Watson 80 John Wilkin 81 Josh Willis Hilary Wilson Philip Woodworth Kehan Yang 82 Fangfang Yao Raymond Zaharia Elena Zakharova 83 Edward Zaron 84 Yongsheng Zhang Zhongxiang Zhao 85 Vadim Zinchenko Victor Zlotnicki 10
11 VOG - Variabilité de l'Océan et de la Glace de mer
LOCEAN - Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques
16 Department of Space and Climate Physics [UCL London]
MSSL - Mullard Space Science Laboratory
51 PROTEO - Processus et interactions de fine échelle océanique
LOCEAN - Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques
64 Lab-STICC_OSE - Equipe Observations Signal & Environnement
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance : UMR6285
73 SPACE - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
77 ABC - Austral, Boréal et Carbone
LOCEAN - Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques
Abstract : In 2018 we celebrated 25 years of development of radar altimetry, and the progress achieved by this methodology in the fields of global and coastal oceanography, hydrology, geodesy and cryospheric sciences. Many symbolic major events have celebrated these developments, e.g., in Venice, Italy, the 15th (2006) and 20th (2012) years of progress and more recently, in 2018, in Ponta Delgada, Portugal, 25 Years of Progress in Radar Altimetry. On this latter occasion it was decided to collect contributions of scientists, engineers and managers involved in the worldwide altimetry community to depict the state of altimetry and propose recommendations for the altimetry of the future. This paper summarizes contributions and recommendations that were collected and provides guidance for future mission design, research activities, and sustainable operational radar altimetry data exploitation. Recommendations provided are fundamental for optimizing further scientific and operational advances of oceanographic observations by altimetry, including requirements for spatial and temporal resolution of altimetric measurements, their accuracy and continuity. There are also new challenges and new openings mentioned in the paper that are particularly crucial for observations at higher latitudes, for coastal oceanography, for cryospheric studies and for hydrology. The paper starts with a general introduction followed by a section on Earth System Science including Ocean Dynamics, Sea Level, the Coastal Ocean, Hydrology, the Cryosphere and Polar Oceans and the “Green” Ocean, extending the frontier from biogeochemistry to marine ecology. Applications are described in a subsequent section, which covers Operational Oceanography, Weather, Hurricane Wave and Wind Forecasting, Climate projection. Instruments’ development and satellite missions’ evolutions are described in a fourth section. A fifth section covers the key observations that altimeters provide and their potential complements, from other Earth observation measurements to in situ data. Section 6 identifies the data and methods and provides some accuracy and resolution requirements for the wet tropospheric correction, the orbit and other geodetic requirements, the Mean Sea Surface, Geoid and Mean Dynamic Topography, Calibration and Validation, data accuracy, data access and handling (including the DUACS system). Section 7 brings a transversal view on scales, integration, artificial intelligence, and capacity building (education and training). Section 8 reviews the programmatic issues followed by a conclusion.
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Saleh Abdalla, Abdolnabi Abdeh Kolahchi, Michaël Ablain, Susheel Adusumilli, Suchandra Aich Bhowmick, et al.. Altimetry for the future: Building on 25 years of progress. Advances in Space Research, Elsevier, 2021, 68 (2), pp.319-363. ⟨10.1016/j.asr.2021.01.022⟩. ⟨insu-03215002⟩

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