FN Archimer Export Format
PT J
TI New Observations From the SWIM Radar On-Board CFOSAT: Instrument Validation and Ocean Wave Measurement Assessment
BT 
AF HAUSER, Daniele
   TOURAIN, Cedric
   HERMOZO, Laura
   ALRADDAWI, D.
   AOUF, L.
   CHAPRON, Bertrand
   DALPHINET, A.
   DELAYE, L.
   DALILA, M.
   DORMY, E.
   GOUILLON, F.
   GRESSANI, Victor
   GROUAZEL, Antoine
   GUITTON, Gilles
   HUSSON, R.
   MIRONOV, Alexey
   MOUCHE, Alexis
   OLLIVIER, A.
   ORUBA, L.
   PIRAS, E.
   SUQUET, R. Rodriguez
   SCHIPPERS, P.
   TISON, C.
   TRAN, Ngan
AS 1:1;2:2;3:2;4:1;5:3;6:4;7:3;8:5,6;9:7;10:8;11:2;12:9;13:4;14:10;15:7;16:11;17:4;18:7;19:1;20:7;21:2;22:5;23:2;24:7;
FF 1:;2:;3:;4:;5:;6:PDG-ODE-LOPS-SIAM;7:;8:;9:;10:;11:;12:;13:PDG-ODE-LOPS-SIAM;14:;15:;16:;17:PDG-ODE-LOPS-SIAM;18:;19:;20:;21:;22:;23:;24:;
C1 Univ Paris Saclay, CNRS, Sorbonne Univ, LATMOS,UVSQ, F-78280 Guyancourt, France.
   Ctr Natl Etud Spatiales, F-31400 Toulouse, France.
   Meteo France, Div Marine & Oceanog, F-31100 Toulouse, France.
   Ifremer, Lab Oceanog Phys & Spatiale LOPS, F-29280 Plouzane, France.
   ACRI ST, F-78280 Guyancourt, France.
   Inst Natl Propriete Ind, F-92677 Courbevoie, France.
   Collecte Localisat Satellites, F-31520 Ramonville St Agne, France.
   Ecole Normale Super, F-75005 Paris, France.
   Ifremer, F-29280 Plouzane, France.
   Oceandatalab, F-29280 Locmaria Plouzane, France.
   Eodyn, F-29280 Plouzane, France.
C2 UNIV PARIS SACLAY, FRANCE
   CNES, FRANCE
   CNRM (METEO FRANCE), FRANCE
   IFREMER, FRANCE
   ACRI ST, FRANCE
   INST NATL PROPRIETE IND, FRANCE
   CLS, FRANCE
   ENS, FRANCE
   IFREMER, FRANCE
   OCEANDATALAB, FRANCE
   EODYN, FRANCE
SI BREST
SE PDG-ODE-LOPS-SIAM
UM LOPS
IN WOS Ifremer UMR
   copubli-france
   copubli-univ-france
IF 8.125
TC 87
UR https://archimer.ifremer.fr/doc/00677/78869/81168.pdf
LA English
DT Article
DE ;Spaceborne radar;Radar cross-sections;Surface waves;Sea surface;Instruments;Altimeter;ocean wave spectra;radar measurements;scatterometer;sea surface;spaceborne radar;speckle noise
AB This article describes the first results obtained from the Surface Waves Investigation and Monitoring (SWIM) instrument carried by the China France Oceanography Satellite (CFOSAT), which was launched on October 29, 2018. 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. It is then shown that the nadir products (significant wave height, normalized radar cross section, and wind speed) exhibit an accuracy similar to standard altimeter missions, thanks to a new retracking algorithm, which compensates a lower sampling rate compared to standard altimetry missions. The off-nadir beam observations are analyzed in detail. The normalized radar cross section varies with incidence and wind speed as expected from previous studies presented in the literature. We illustrate that, in order to retrieve the wave spectra from the radar backscattering fluctuations, it is crucial to apply a speckle correction derived from the observations. Directional spectra of ocean waves and their mean parameters are then compared to wave model data at the global scale and to in situ data from a selection of case studies. The good efficiency of SWIM to provide the spectral properties of ocean waves in the wavelength range [70500 m] is illustrated. The main limitations are discussed, and the perspectives to improve the data quality are presented. 
PY 2021
PD JAN
SO Ieee Transactions On Geoscience And Remote Sensing
SN 0196-2892
PU Ieee-inst Electrical Electronics Engineers Inc
VL 59
IS 1
UT 000603079000001
BP 5
EP 26
DI 10.1109/TGRS.2020.2994372
ID 78869
ER

EF