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

机译:卡罗尔斯:一种新型的机载L波段辐射计用于海洋表面和陆地观测

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摘要

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.
机译:“用于海洋和陆地研究的合作式机载辐射仪”(CAROLS)L波段辐射仪是丹麦技术大学团队构建的EMIRAD II辐射仪的副本。它是一种全极化和直接采样相关辐射计。它与其他机载仪器(C波段散射仪—STORM,GOLD-RTR GPS系统,红外CIMEL辐射计和可见光波长摄像机)一起安装在法国ATR42专用研究飞机上。在获得最初的实验室资质之后,在2007年,2008年和2009年,在法国西南部,巴伦西亚基地和比斯开湾(大西洋)上进行了3次空降战役,涉及现场飞行战役,共进行21次飞行。为了验证CAROLS数据,已实施了各种飞机飞行模式和操纵,包括直线水平飞行,环形飞行,机翼和前摆在海洋上。对2007年和2008年的前两个活动的分析使我们在通道之间的隔离度和滤波器带宽方面改进了CAROLS辐射计。实施这些改进后,结果表明该仪器符合规范,是土壤水分和海洋盐度(SMOS)卫星验证以及表面土壤水分或海洋盐度特定研究的有用工具。

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