CAROLS: A New Airborne L-Band Radiometer for Ocean Surface and Land Observations

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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  • Author: Zribi, Mehrez

    CESBIO (CNRS/IRD/CNES/UPS)

  • Author: Parde, Mickael

    Université Versailles St-Quentin

  • Author: Boutin, Jacquline

    LOCEAN, France

  • Author: Fanise, Pascal

    Université Versailles St-Quentin

  • Author: Hauser, Daniele

    Université Versailles St-Quentin

  • Author: Dechambre, Monique

    Université Versailles St-Quentin

  • Author: Kerr, Yann

    CESBIO (CNRS/IRD/CNES/UPS)

  • Author: Leduc-Leballeur, Marion

    Université Versailles St-Quentin

  • Author: Reverdin, Gilles

    LOCEAN, France

  • Author: Skou, Niels

    Microwaves and Remote Sensing, National Space Institute, Technical University of Denmark, Ørsteds Plads, 2800, Kgs. Lyngby, Denmark

  • Author: Søbjærg, Sten Schmidl

    Microwaves and Remote Sensing, National Space Institute, Technical University of Denmark, Ørsteds Plads, 2800, Kgs. Lyngby, Denmark

  • Author: Albergel, Clement

    CNRM GAME Meteo France, CNRS, URA 1357, Toulouse, France

  • Author: Calvet, Jean Christophe

    CNRM/GAME (Météo-France, CNRS)

  • Author: Wigneron, Jean Pierre

    INRA, France

  • Author: Lopez-Baeza, Ernesto

    Universitat de Valencia

  • Author: Rius, Antonio

    IEEC ICE CSIC, Spain

  • Author: Tenerelli, Joseph

    CLS

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The "Cooperative Airborne Radiometer for Ocean and Land Studies" (CAROLS) L-Band radiometer was designed and built as a copy of the EMIRAD II radiometer constructed by the Technical University of Denmark team. It is a fully polarimetric and direct sampling correlation radiometer. It is installed on board a dedicated French ATR42 research aircraft, in conjunction with other airborne instruments (C-Band scatterometer-STORM, the GOLD-RTR GPS system, the infrared CIMEL radiometer and a visible wavelength camera). Following initial laboratory qualifications, three airborne campaigns involving 21 flights were carried out over South West France, the Valencia site and the Bay of Biscay (Atlantic Ocean) in 2007, 2008 and 2009, in coordination with in situ field campaigns. In order to validate the CAROLS data, various aircraft flight patterns and maneuvers were implemented, including straight horizontal flights, circular flights, wing and nose wags over the ocean. Analysis of the first two campaigns in 2007 and 2008 leads us to improve the CAROLS radiometer regarding isolation between channels and filter bandwidth. After implementation of these improvements, results show that the instrument is conforming to specification and is a useful tool for Soil Moisture and Ocean Salinity (SMOS) satellite validation as well as for specific studies on surface soil moisture or ocean salinity.
Original languageEnglish
JournalSensors
Publication date2011
Volume11
Issue1
Pages719-742
ISSN1424-8220
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 14
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