Level 1 Products from the 2021 campaign of the airborne Ku-Band KuROS radar
- DOI
- 10.21413/Kuros-2021.L1.v1
- Sujet
- Radar observation of the ocean surface
- Date de publication
- 2022-02-08
- Période
- 2021-02-15/2021-03-04
- Localisation(s)
- Gulf of Biscaye, Atlantic Ocean
- Auteur(s)
- Danièle Hauser, Christophe Dufour, Patricia Schippers, Christophe Le Gac, Nicolas Pauwels
- Affiliation(s)
- LATMOS, CNRS, UVSQ, Sorbonne University, ACRI-ST
- Editeur
- LATMOS
- Financement(s)
- CNES
- Langue(s)
- Anglais
- Résumé
-
This data set contains radar observations of the ocean surface . The instrument is an airborne Ku-Band Doppler radar named "KuROS".
This instrument was designed to measure the directional spectra of surface ocean waves , the ocean surface wind vector, and related parameters including the normalized radar cross-section profile with incidence.
This data set is relative to the Level 1 product, which contains the radar wave form (intensity and phase) versus range (with 1.5m resolution), the normalized radar cross-section versus incidence angle and ancillary data related to the geometry and localization of observations. The mean incidence angle of the observations is about 12.4° and the normalized radar cross-sections can be estimated from about 5° to about 20°. The observations are acquired over all azimuth angles from 0° to 360°. Level 2 data will correspond to ocean wave spectra estimated from the observations collected between 5° and 20°.
This data set is relative to the 2021 SUMOS campaign with 17 flights over the gulf of Biscaye, among which 13 were coordinated with CFOSAT passages.
- Méthode(s)
- The Level 1 products are obtained from the raw data of KuROS after the following main steps: time integration over 33 ms, conversion to geophysical units, radiometric and geometric corrections to obtain the normalized radar cross-section. See Caudal et al, JTECH 2014 for more details.
- Informations techniques
-
All the flights were performed at an altitude of about 3000m (±200m) with respect to the surface (some samples have however been acquired when the airplane was at 2000m during flight #14). The instrument has been calibrated before and after the campaign based on 1) laboratory measurements, 2) antenna pattern measurements, 3) calibration flights over corner reflectors. The calibration parameters adopted in the L1 and L2 processing are our best possible evaluation based on this multifold approach, which however cannot guarantee perfect corrections.
The KuROS data can be downloaded with 3 possible choices:
1) original 30-s file by 30-s file (the filename gives the mode of radar acquisition, the date and the starting time of acquisition)
2) a compressed file (.zip) containing several 30-s files as selected by the user
3) one or several concatenated files, which group the files with data of a same type (same flight, same antenna, same flight level, same polarisation).
- Version
- 1.0
- Format
- application/x-netcdf
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