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Characterizing Rain Cells as Measured by a Ka-Band Nadir Radar Altimeter: First Results and Impact on Future Altimetry Missions

Bruno Picard, Nicolas Picot, Gérald Dibarboure, Nathalie Steunou
2021 Remote Sensing  
The SARAL/AltiKa mission and its Ka-band nadir altimeter offer a unique opportunity to assess this impact.  ...  The impact of large atmospheric attenuation events on data quality and availability is a critical aspect for future altimetry missions based on Ka-band altimetry.  ...  First, the robust characterization of rain cells can be used to draw some guidelines for the future altimetry missions based on the Ka band as SWOT (oceanography and terrestrial surface water), SKIM (oceanic  ... 
doi:10.3390/rs13234861 fatcat:cpztjek3urc53i6243zlfyocbm

The Benefits of the Ka-Band as Evidenced from the SARAL/AltiKa Altimetric Mission: Quality Assessment and Unique Characteristics of AltiKa Data

Pascal Bonnefond, Jacques Verron, Jérémie Aublanc, K. Babu, Muriel Bergé-Nguyen, Mathilde Cancet, Aditya Chaudhary, Jean-François Crétaux, Frédéric Frappart, Bruce Haines, Olivier Laurain, Annabelle Ollivier (+5 others)
2018 Remote Sensing  
The India-France SARAL/AltiKa mission is the first Ka-band altimetric mission dedicated to oceanography.  ...  It shows also that beyond the fact that AltiKa data quality meets the expectations and initial mission requirements, the unique characteristics of the altimeter and the Ka-band offer unique contributions  ...  Acknowledgments: The SARAL/AltiKa mission is an achievement of a very fruitful cooperation between ISRO and CNES. The contribution of EUMETSAT to data distribution is also strongly appreciated.  ... 
doi:10.3390/rs10010083 fatcat:lplo2fk7rjhd3leenpvgsqqsgu

AltiKa: a Ka-band Altimetry Payload and System for Operational Altimetry during the GMES Period

Patrick Vincent, Nathalie Steunou, Eric Caubetq, Laurent Phalippou, Laurent Rey, Eric Thouvenot, Jacques Verron
2006 Sensors  
This paper describes the Ka-band altimetry payload and system that has been studied for several years by CNES, ALCATEL SPACE and some science laboratories.  ...  A coupled Ka-band altimeter-radiometer payload is then described; technical items are detailed to explain how this payload shall meet the science and operational requirements, and expected performances  ...  Acknowledgments The work presented in this paper involved a large number of scientists who have been contributing through the AltiKa Mission Group: The authors would like to thank all these scientists  ... 
doi:10.3390/s6030208 fatcat:rpylptytsjf73eipczyxo37b5q

Fine-scale Altimetry and the Future SWOT Mission [chapter]

Rosemary Morrow, Dennis Blurmstein, Gerald Dibarboure
2018 New Frontiers in Operational Oceanography  
We present the advantages of the measurement techniques in conventional Ku-band (Jason) and Ka-band (Saral), and in global SAR mode .  ...  We concentrate on the ocean component of this mission, which will provide the first two-dimensional (2D) observations of SSH on a 1-2 km grid.  ...  In this first section, we detail some of the characteristics and advances of the most recent LRM missions in Ku-and Ka-band, as well as their differences from the SAR along-track missions.  ... 
doi:10.17125/gov2018.ch08 fatcat:eod7oxlnivhajliqb42u7gxw6e

Surface-based Ku- and Ka-band polarimetric radar for sea ice studies

Julienne Stroeve, Vishnu Nandan, Rosemary Willatt, Rasmus Tonboe, Stefan Hendricks, Robert Ricker, James Mead, Robbie Mallett, Marcus Huntemann, Polona Itkin, Martin Schneebeli, Daniela Krampe (+5 others)
2020 The Cryosphere  
This instrument, built to operate both as an altimeter (stare mode) and as a scatterometer (scan mode), provided the first in situ Ku- and Ka-band dual-frequency radar observations from autumn freeze-up  ...  To improve our understanding of how snow properties influence sea ice thickness retrievals from presently operational and upcoming satellite radar altimeter missions, as well as to investigate the potential  ...  This paper was edited by Chris Derksen and reviewed by Nathan Kurtz and one anonymous referee.  ... 
doi:10.5194/tc-14-4405-2020 fatcat:6p4om2qhpvedvgkzgepnpxqsia

Monitoring Sea Level in the Coastal Zone with Satellite Altimetry and Tide Gauges

Paolo Cipollini, Francisco M. Calafat, Svetlana Jevrejeva, Angelique Melet, Pierre Prandi
2016 Surveys in geophysics  
This trend towards better altimetric data at the coast comes also from technological innovations such as Ka-band altimetry and SAR altimetry, and we discuss the advantages deriving from the AltiKa Ka-band  ...  A case study along the UK coast demonstrates the good agreement between coastal altimetry and tide gauge observations, with root mean square differences as low as 4 cm at many stations, allowing the characterization  ...  The X-TRACK altimetry data used in this study were developed, validated and distributed by the CTOH/LEGOS, France.  ... 
doi:10.1007/s10712-016-9392-0 pmid:32269397 pmcid:PMC7115061 fatcat:jcs3cikfovdulfmwmhwxofocq4

Monitoring Sea Level in the Coastal Zone with Satellite Altimetry and Tide Gauges [chapter]

Paolo Cipollini, Francisco M. Calafat, Svetlana Jevrejeva, Angelique Melet, Pierre Prandi
2017 Space Sciences Series of ISSI  
This trend towards better altimetric data at the coast comes also from technological innovations such as Ka-band altimetry and SAR altimetry, and we discuss the advantages deriving from the AltiKa Ka-band  ...  A case study along the UK coast demonstrates the good agreement between coastal altimetry and tide gauge observations, with root mean square differences as low as 4 cm at many stations, allowing the characterization  ...  The X-TRACK altimetry data used in this study were developed, validated and distributed by the CTOH/LEGOS, France.  ... 
doi:10.1007/978-3-319-56490-6_3 fatcat:iwd5lg2bqbexjlbotwif76vxwu

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  
As discussed in the previous part of this review paper, Remote Sensing (RS) creates unprecedented opportunities by providing a variety of systems with different characteristics to study and monitor oceans  ...  Here, in part 2, seven active RS systems, including scatterometers, altimeters, gravimeters, Synthetic Aperture Radar (SAR), Light Detection and Ranging (LiDAR), Sound Navigation and Ranging (SONAR), High-Frequency  ...  The Satellite with Argos and Altika/Ka-band Altimeter (SARAL/Altika) was launched on 25 February 2013 as the first altimeter to carry onboard a Ka-band sensor [73] , [74] .  ... 
doi:10.1109/jstars.2022.3141980 fatcat:kc55frb76nbtfkkfabvhbtflem

Ocean Measurements from Space in 2025

Anthony Freeman, Victor Zlotnicki, Tim Liu, Ben Holt, Ron Kwok, Simon Yueh, Jorge Vazquez, Dave Siegel, Gary Lagerloef
2010 Oceanography  
The islands of San miguel, Santa rosa, and Santa cruz are shown from west to east.Figure © 2003Canadian Space Agency SWOT) mission as the first flight of this new radar altimeter that will bring SSH measurement  ...  The increased exposure of the polar oceans resulting from sea ice cover retreat directly impacts surface albedo and resulting ocean warming.  ... 
doi:10.5670/oceanog.2010.12 fatcat:vvdbyzp7jfc65odkgwtjgbvrne

Microwave remote sensing from space

K.R. Carver, C. Elachi, F.T. Ulaby
1985 Proceedings of the IEEE  
A discussion of future microwave remote sensor techne logical developments and challenges is presented, along with a summary of future missions being planned by several countries.  ...  A brief review of the historical development and principles of active and passive microwave remote sensing is presented, with emphasis on the unique characteristics of the information obtaim able in the  ...  WINTER Satellite-borne radar altimeters are useful for mapping changes, as was first demonstrated by the GOES-3 altimeter launched in 1975.  ... 
doi:10.1109/proc.1985.13230 fatcat:uelvzywrg5d6pms5zc7j2uqggm

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  
These include the generalization of directional measurements, an easier exchange of moored buoy data, the measurement of waves on drifting buoys, the evolution of satellite altimeter technology, and the  ...  measurement of directional wave spectra from satellite radar instruments.  ...  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

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  ...  The Sentinel-3 Mission Performance Centre (S3MPC) is tasked by the European Space Agency (ESA) to monitor the health of the Copernicus Sentinel-3 satellites and ensure a high data quality to the users.  ...  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

New Observations From the SWIM Radar On-Board CFOSAT: Instrument Validation and Ocean Wave Measurement Assessment

Daniele Hauser, Cedric Tourain, Laura Hermozo, D. Alraddawi, L. Aouf, B. Chapron, A. Dalphinet, L. Delaye, M. Dalila, E. Dormy, F. Gouillon, V. Gressani (+12 others)
2020 IEEE Transactions on Geoscience and Remote Sensing  
SWIM is a Ku-Band radar with a near-nadir scanning beam geometry. It was designed to measure the spectral properties of surface ocean waves. First, the good behavior of the instrument is illustrated.  ...  This paper describes first results obtained from the SWIM (Surface Waves Investigation and Monitoring) instrument carried by CFOSAT (China France Oceanography Satellite), which was launched on October  ...  Lachiver as project SWIM managers in the development and operational phase, respectively, N. Corcoral as system engineer, T. Amiot as SWIM instrument responsible. We have a thought for G.  ... 
doi:10.1109/tgrs.2020.2994372 fatcat:onqtclkfyjeurlqxxhiakys2wa

The Winds and Currents Mission Concept

Ernesto Rodríguez, Mark Bourassa, Dudley Chelton, J. Thomas Farrar, David Long, Dragana Perkovic-Martin, Roger Samelson
2019 Frontiers in Marine Science  
WaCM features a Ka-band pencil-beam Doppler scatterometer able to map ocean winds and currents globally. We review the principles behind the WaCM measurement and the requirements driving the mission.  ...  The Winds and Currents Mission (WaCM) is a proposed approach to meet the need identified by the NRC Decadal Survey for the simultaneous measurements of ocean vector winds and currents.  ...  ACKNOWLEDGMENTS The research was partially carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004  ... 
doi:10.3389/fmars.2019.00438 fatcat:z4bvmu7csrfu7ouzd5uyaup6mi

Towards improved analysis of short mesoscale sea level signals from satellite altimetry

Yves Quilfen, Jean-François Piolle, Bertrand Chapron
2022 Earth System Science Data  
However, below a wavelength of about 70 km, along-track altimeter measurements are often characterized by a dramatic drop in signal-to-noise ratio (SNR), making it very challenging to fully exploit the  ...  For the available period, measurements from the Jason-3, Sentinel-3, and SARAL/AltiKa missions are processed and analyzed, and their energy spectral and seasonal distributions are characterized in the  ...  Manzella and reviewed by two anonymous referees.  ... 
doi:10.5194/essd-14-1493-2022 fatcat:3xiq2ibirfdcdl52xvfzetsweq
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