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  • 软件名称:FY-3近红外与热红外资料大气柱水汽总量反演对比
  • 软件大小: 0.00 B
  • 软件评级: ★★★
  • 开 发 商: 周爱明,鲍艳松,魏鸣,陆其峰
  • 软件来源: 《遥感技术与应用》
  • 解压密码:www.gissky.net

资源简介

摘要: 大气水汽含量信息对卫星图像辐射校正、大气微物理过程理解、降水预报等具有重要意义。分别利用FY\|3A中分辨率成像光谱仪(MERSI)近红外和扫描辐射计(VIRR)热红外通道反演大气柱水汽总量,并将反演结果与地面探空站观测值进行比对分析,结果表明:①MERSI反演值与观测值的相关系数为0.763,而VIRR反演值与观测值的相关性较差,相关系数为0.169;从水汽含量的反演精度看,MERSI(RMSE=1.109 g/cm2)高于VIRR(RMSE=1.894 g/cm2);②MERSI三通道水汽反演精度比17、18、19通道(RMSE分别为1.133、1.424和1.827 g/cm2)高,主要原因是3个水汽通道对水汽敏感性不同,综合利用3个通道反演大气柱水汽含量可达到取长补短的效果。 关键词: MERSI;  VIRR;  水汽含量;  反演     Abstract: Atmospheric water vapor content has important significance for radiometric correction of satellite image,understanding of atmospheric micro\|physical process,precipitation prediction and so on.We will retrievie atmospheric column water vapor based on Moderate Resolution Imaging Spectroradiometer (MERSI)near infrared channels and Visible and Infrared Radiometer (VIRR)thermal infrared channels datas of FY\|3A,respectively.Comparing the retrieval results of MERSI,VIRR and the observations of sounding ground stations respectively,we find :① the observed correlation between retrieval results of MERSI and observations is 0.763,while retrieval results of VIRR has poor correlations with observations,which is0.169.What’s more,The retrieval accuracy of MERSI (1.108 g/cm2)is higher than that of VIRR (1.894 g/cm2);②The average atmospheric column water vapor with three channels of MERSI has higher retrieval accuracy than channel 17th(1.133 g/cm2),18th(1.424 g/cm2),19th(1.827 g/cm2).The main reason is that three channels have different sensitivities of water vapor,and utilizing three channels to retrieve atmospheric column water vapor content can reach the effect of perfection.

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