两种ASCAT散射计风产品的比较及评估

发布时间：2018-06-18 06:04

本文选题：ASCAT散射计 + 浮标　；参考：《海洋科学》2016年04期

【摘要】：基于浮标和步进频率微波辐射计(SFMR,Stepped-Frequency Microwave Radiometer)数据对NASA JPL(Jet Propulsion Laboratory)和RSS(Remote Sensing Systems)公司分别发布的已广泛应用于全球海面风场观测的ASCAT(Advanced SCATterometer)散射计风产品进行了比较和分析。结果表明,两者风速在中低风速(15 m/s)时基本一致;高风速(15 m/s)时RSS风速整体高于JPL风速。通过浮标数据对比,风速15 m/s时两者风速精度一致;风速15 m/s时两者风速RMS相当,但JPL和RSS风速分别低估和高估。利用SFMR数据检验表明RSS风速与SFMR风速一致性更好。两者风向精度在低风速(5 m/s)时较低,但随风速增加而提高并趋于稳定。该研究结果对相关科研人员的ASCAT散射计风产品选择具有重要的指导意义。
[Abstract]:Based on the data of buoy and step frequency microwave radiometer SFMRN Stepped-Frequency Microwave Radiometer, the ASCATT Advanced SCATterometerometer wind scattering products, which have been widely used in the global sea surface wind field observation, published by NASA JPLN Jet Propulsion Laboratoryand RSSRemote Sensing Systems respectively, are compared and analyzed. The results show that the wind speed of both is basically the same at the middle and low wind speeds of 15 m / s, and the RSS wind speed of 15 m / s at high wind speed is higher than that of the JPL wind speed on the whole. By comparing the data of buoy, the accuracy of wind speed is the same when the wind speed is 15 m / s, the RMS is the same when the wind speed is 15 m / s, but the wind speed of JPL and RSS is underestimated and overestimated respectively. SFMR data test shows that RSS wind speed is more consistent with SFMR wind speed. The accuracy of wind direction is lower at low wind speed of 5 m / s, but increases with the increase of wind speed and tends to be stable. The results of this study are of great significance to the selection of ASCAT scatterometer products.
【作者单位】：哈尔滨工业大学电子与信息工程学院;国家海洋局第一海洋研究所;
【基金】：国家高技术研究发展计划(863计划)(SS2013AA091206,SQ2011GX06D05972) 民用航天技术预先研究项目(2014090-090)~~
【分类号】：P714.2

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