FY-3A气象卫星大气垂直探测仪器数据几何位置匹配试验

随着卫星搭载的有效载荷数目的增加,卫星数据种类也不断增加,利用有限的数据资源获得多种卫星或多种仪器遥感数据源的信息,可以增强对目标物的检测与识别能力,提高卫星遥感应用的精度、范围和效率。以风云三号气象卫星L1级模拟数据为基础,用建立匹配查找表的方法进行红外分光计、微波温度计、微波湿度计三个大气垂直探测仪器的数据几何位置匹配技术研究,把三个仪器的观测资料统一匹配到红外分光计的观测格点上,并对匹配前后的资料进行了分析。匹配结果表明,当微波湿度计观测资料匹配到与其分辨率相差不大的红外分光计格点上时,其探测资料的精度损失不大,基本上保持了原有分辨率上观测资料的数据分布信息。而当微波湿度计观测资料匹配到与其分辨率相差较大的微波温度计格点上时(从15km分辨率匹配到50km分辨率上),总的数据信息损失不大,只有一些较细致的数据纹理信息有所损失,匹配后的观测资料为卫星大气垂直探测提供了良好的数据基础。

Geometric Location Matching Experiments of Atmospheric Vertical Sounders on FY-3A Satellite

With the increase in number of instruments on board of satellites,the data transmitted by satellite possess of continuously increasing data types,using the limited data sources to get multi-satellite or multi-instrument remote sensing information can enhance the ability of remote detection to objectives,improve the accuracy and efficiency of remote sensing,and expand the application extension of satellite data.Based on the simulated FY-3A satellite Level 1 data,with the method of building look-up table to study the matching techniques of the Microwave humidity sounder(MWHS),Microwave temperature sounder(MWTS) and Infrared atmospheric sounder(IRAS) brightness temperature data,map both MWHS and MWTS data to IRAS observed location,and analyzed the matching techniques effect.The results show when the mutual matching instruments with nearly spatial resolution,such as MWHS data matching to IRAS observed location(15 kilometers resolution map to 17 kilometers resolution),the matched brightness temperature well keep the origin information,while the mutual matching instruments with widely different spatial resolution,for instance MWHS data matched to MWTS observed location(15 kilometers resolution map to 50 kilometers resolution),in general the matched pictures kept the primal data information,only some weak detailed information been lost.The matched satellite data of atmospheric vertical sounders provide ampliative data sources for vertical sounding.