基于MODIS的HJ-1B热红外交叉辐射定标与时间序列建立  

HJ-1B Thermal Infrared Cross Radiation Calibration and Time Series Establishment Based on MODIS

作　　者：周方婷 冯多 刘鑫 谢勇 ZHOU Fangting;FENG Duo;LIU Xin

机构地区：[1]南京信息工程大学地理科学学院,江苏南京210044

出　　处：《科技创新与应用》2021年第21期16-19,共4页Technology Innovation and Application

基　　金：国家自然科学基金(编号:41671345);南京信息工程大学人才启动基金(编号:2243141601074)。

摘　　要：定量遥感应用迫切需要用到长时间序列数据,但历史数据的辐射精度不高,会给定量化遥感应用带来较大的不确定性。因此开展退役卫星历史数据的再定标,对于定量化应用具有极其重要的意义。为了获得定量遥感应用中较为精确的时间序列数据,文章选择已退役的HJ-1B卫星,基于MODIS数据,探索了HJ-1B红外发射谱段准SNO交叉定标方法,通过多年连续数据计算出利用典型场景红外发射谱段再定标系数的时间序列,并通过实验数据的反演对再定标结果进行检验。Long time series data are urgently needed in quantitative remote sensing application,but the radiation precision of historical data is not high,which will bring great uncertainty to quantitative remote sensing application.Therefore,it is of great significance for quantitative application to carry out the re-calibration of decommissioned satellite historical data.In order to obtain more accurate time series data in quantitative remote sensing applications,this article selected the retired HJ-1B satellite,based on the data of MODIS,explored the quasi-SNO cross calibration method for HJ-1B infrared emission spectrum segment.The time series of the re-calibration coefficient using typical infrared emission spectrum segment was calculated through years of continuous data,and the re-calibration results were verified through the inversion of experimental data.

关 键 词：HJ-1B MODIS 热红外 交叉辐射定标 时间序列 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]