非降水条件下微波辐射计海面风遥感产品性能分析

发布时间：2018-01-11 02:01

本文关键词：非降水条件下微波辐射计海面风遥感产品性能分析　出处：《遥感技术与应用》2016年01期 　论文类型：期刊论文

【摘要】：通过对5种微波辐射计SSM/I、SSM/IS、TMI、AMSR-E和WINDSAT以及2种微波散射计ASCAT和QUIKSCAT多年的海面风产品同浮标同步的实测资料进行数据匹配处理,再对匹配后的数据进行数据分析和统计。研究结果表明:微波辐射计遥感海面风的性能在1m/s左右,可以满足绝大多数应用的需求。微波辐射计的低频海面风产品性能优于中频产品,但是中频数据地面分辨率高,建议在近海应用中使用中频产品,在大洋应用中使用低频产品。就不同微波辐射计而言,AMSR-E和WINDSAT性能较优,SSM/I和SSM/IS性能较差,TMI则处于中等水平。微波辐射计测量风速的性能与微波散射计相比处于同一水平,但在高风速段微波辐射计有一定优势。微波辐射计中仅全极化微波辐射计WINDSAT具有测量海面风向的能力,在低风速段,WINDSAT测量海面风向的性能远远不及微波散射计,只有风速超过6m/s时,WINDSAT提供的海面风向数据才能符合应用的需求。当风速超过8m/s后,WINDSAT遥感海面风向的能力就和微波散射计基本一致。在此基础上,提出了强风条件下深入研究的必要性,并对浮标测风存在的问题做出了初步的分析并指出了改进的方向。
[Abstract]:Five kinds of microwave radiometers, SSM / I, SSM / ISM / TMI, were studied. AMSR-E and WINDSAT, as well as the sea surface wind products of two microwave scattermeters ASCAT and QUIKSCAT for many years, are matched with the measured data of buoy. The results show that the performance of microwave radiometer in remote sensing of sea surface wind is about 1 m / s. Microwave radiometer has better performance than if product, but the ground resolution of if data is high. It is suggested to use intermediate frequency product in offshore application. For different microwave radiometers, the performance of AMSR-E and WINDSAT is better than that of SSM / I and SSM/IS. The performance of microwave radiometer in measuring wind speed is at the same level as that of microwave scatterometer. However, microwave radiometer has some advantages in high wind speed. In microwave radiometer, only fully polarized microwave radiometer (WINDSAT) has the ability to measure the wind direction of the sea surface, and in the low wind speed section. The performance of WINDSAT in measuring the wind direction of the sea surface is far less than that of the microwave scatterometer, only when the wind speed exceeds 6 m / s. The sea surface wind direction data provided by WINDSAT can meet the requirements of the application. When the wind speed exceeds 8m / s. The ability of WINDSAT remote sensing of sea surface wind direction is basically consistent with that of microwave scatterometer. On this basis, the necessity of further study under strong wind conditions is put forward. The existing problems of buoy wind measurement are analyzed preliminarily and the direction of improvement is pointed out.
【作者单位】：中国科学院大气物理研究所中层大气与全球环境探测重点实验室;中国科学院大学;
【基金】：中国科学院对外合作重点项目(GJHZ1207)
【分类号】：P715.7;P714.2
【正文快照】： 1引言1.1研究背景海面风遥感是海洋遥感中的一个重要组成部分,目前,有多种遥感器具备海面风遥感能力,包括微波散射计[1-2]、微波辐射计[3-4]、微波高度计[5-6]和合成孔径雷达[7-8],此外,导航卫星反射信号也被认为具有遥感海面风的潜力[9-10]。尽管微波散射计是公认的最重要的

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