TY - JOUR
T1 - Altimetry for the future
T2 - Building on 25 years of progress
AU - Abdalla, Saleh
AU - Abdeh Kolahchi, Abdolnabi
AU - Ablain, Michaël
AU - Adusumilli, Susheel
AU - Aich Bhowmick, Suchandra
AU - Alou-Font, Eva
AU - Amarouche, Laiba
AU - Andersen, Ole Baltazar
AU - Antich, Helena
AU - Aouf, Lotfi
AU - Arbic, Brian
AU - Armitage, Thomas
AU - Arnault, Sabine
AU - Artana, Camila
AU - Aulicino, Giuseppe
AU - Ayoub, Nadia
AU - Badulin, Sergei
AU - Baker, Steven
AU - Banks, Chris
AU - Bao, Lifeng
AU - Barbetta, Silvia
AU - Barceló-Llull, Bàrbara
AU - Barlier, François
AU - Basu, Sujit
AU - Bauer-Gottwein, Peter
AU - Becker, Matthias
AU - Beckley, Brian
AU - Bellefond, Nicole
AU - Belonenko, Tatyana
AU - Benkiran, Mounir
AU - Benkouider, Touati
AU - Bennartz, Ralf
AU - Benveniste, Jérôme
AU - Bercher, Nicolas
AU - Berge-Nguyen, Muriel
AU - Bettencourt, Joao
AU - Blarel, Fabien
AU - Blazquez, Alejandro
AU - Blumstein, Denis
AU - Bonnefond, Pascal
AU - Borde, Franck
AU - Bouffard, Jérôme
AU - Boy, François
AU - Boy, Jean Paul
AU - Brachet, Cédric
AU - Brasseur, Pierre
AU - Braun, Alexander
AU - Brocca, Luca
AU - Brockley, David
AU - Schneider, Raphael
AU - International Altimetry Team
N1 - Funding Information:
This collective synthesis of the worldwide interdisciplinary altimetry community would not have been possible without the support that has been given to each of the contributors by numerous institutions at local, national and intergovernmental levels. At the forefront of this support, we must obviously mention the space agencies CNES, ESA and NASA which have played and still play a decisive role in the development and launch of several prominent altimetry missions from the outset. Other agencies such as DLR, EUMETSAT, ISRO, NOAA, NSOAS and organizations such as CMEMS, also contribute significantly to developments in all forms of altimetry. We are very grateful to all the players in the previous organizations and many others that we cannot list extensively here, and that were all behind this remarkable success of radar altimetric technology and made the many scientific, technical and application developments possible. Sincere thanks should be specifically addressed to all contributors either individually or as responsible in various capacities (thematic leaders, session chairmen, contributors to round tables, actors from different space agencies or national organizations or international, etc.), who provided their inputs in different forms to this document. We also warmly thank the reviewers for their helpful comments to improve the article. The views, opinions, and findings contained in this article are those of the authors and should not be construed as an official National Oceanic and Atmospheric Administration (NOAA) or U.S. Government position, policy, or decision. This also applied to other Organizations or Institutes.
Publisher Copyright:
© 2021 COSPAR
PY - 2021/7/15
Y1 - 2021/7/15
N2 - 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.
AB - 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.
KW - Coastal oceanography
KW - Cryospheric sciences
KW - Hydrology
KW - Oceanography
KW - Satellite altimetry
KW - Sea level
UR - http://www.scopus.com/inward/record.url?scp=85103075118&partnerID=8YFLogxK
U2 - 10.1016/j.asr.2021.01.022
DO - 10.1016/j.asr.2021.01.022
M3 - Article
AN - SCOPUS:85103075118
SN - 0273-1177
VL - 68
SP - 319
EP - 363
JO - Advances in Space Research
JF - Advances in Space Research
IS - 2
ER -