摘要
海面盐度是描述海洋的重要参量之一,基于星载微波辐射计的海面盐度探测也是海洋遥感研究的重要内容。在影响盐度遥感的误差中,大气是重要的影响因素。在辐射传输理论的基础上,仿真计算了大气透射率和上、下行辐射随地面大气温度、压强和辐射计入射角的变化关系,进而得到大气对接收辐射亮温的影响。仿真结果表明,大气对盐度遥感的影响很大,但当地面大气温度和压强精度分别达到2℃和1 000 Pa时,可以消除大气的影响。
Sea surface salinity is a key physical parameter in ocean science. It is important in ocean remote sensing to retrieve sea surface salinity by the microwave radiometer. There are a set of geophysical error sources for the microwave remote sensing of sea surface salinity, among which atmospheric propagation effects is indispensable. Based on the theory of atmospheric propagation, the relationship between transmittance, up-radiation, down-radiation of atmosphere and atmospheric temperature and pressure of the earth＇s surface and incidence angle is calculated, along with the influence form atmosphere. The result showed that the atmospheric propagation effect was serious, unless when the precision of atmospheric temperature and pressure of the earth surface was 2℃ and 10hPa.
出处
《海洋技术》
北大核心
2009年第4期68-71,共4页
Ocean Technology
关键词
海面盐度
卫星遥感
大气传输
微波辐射计
sea surface salinity
satellite remote sensing
atmospheric propagation
microwave radiometer
