GF-5卫星模拟单通道SST反演  

GF-5 Satellite Simulated Single Channel SST Retrieval

作　　者：崔文杰 李忠[1] 李家国 朱利[3] 张永红 CUI Wenjie;LI Zhong;LI Jiaguo;ZHU Li;ZHANG Yonghong(Institute of Disaster Prevention and Technology,Langfang,Hebei 065000,China;Institute of Remote Sensing Application and Digital Earth,Chinese Academy of Sciences,Beijing 100101,China;Satellite Environment Center,Ministry of Environmental Protection,Beijing 100094,China)

机构地区：[1]防灾科技学院,河北廊坊065000 [2]中国科学院遥感与数字地球研究所,北京100101 [3]环境保护部卫星环境应用中心,北京100094

出　　处：《遥感信息》2020年第3期57-62,共6页Remote Sensing Information

基　　金：中央高校基本科研业务费专项项目(ZY20180121);廊坊市科技支撑计划项目(2017013157)。

摘　　要：针对国内外热红外数据空间分辨率低、反演温度精度低的问题,提出了基于高分辨率GF-5卫星热红外通道修订的单通道海表温度(sea surface temperature,SST)反演算法。以大气传输模型软件(moderate resolution atmospheric transmittance and radiance code4.0,MODTRAN 4.0)与全球大气廓线数据(thermodynamic initial guess retrieval,TIGR)为基础,采用Jiménez-Muoz&Sobrino’s单通道算法和QIN单通道算法对GF-5卫星热红外数据进行SST的模拟反演研究。通过对比不同条件下的反演误差,结果表明,B11通道的反演精度高、效果最好,B12、B10通道次之,B09通道反演精度最低;传感器垂直向下观测即观测天顶角为0°时的SST反演精度最高。由于单通道算法反演误差较大,因此进行了二次修订,修订后效果有明显改善,误差在1 K以内。A single-channel sea surface temperature(SST)retrieval algorithm based on GF-5 satellite thermal infrared channel correction is proposed to solve the problems of low spatial resolution and low retrieval accuracy of thermal infrared data at home and abroad.Based on MODTRAN 4.0(moderate resolution atmospheric transmittance and radiance code4.0)and TIGR(thermodynamic initial guess retrieval),this paper uses Jiménez-Muoz&Sobrino’s single-channel algorithm and QIN single-channel to simulate the SST retrieval of GF-5 satellite thermal infrared data.By comparing the retrieval errors under different conditions,the results show that the retrieval accuracy of B11 channel is high and the effect is the best,the retrieval accuracy of B12 channel and B10 channel is the second,and the retrieval accuracy of B09 channel is the lowest.The vertical downward observation of the sensor means that the SST retrieval accuracy is the highest when the zenith angle is 0°.Because the retrieval error of single channel algorithm is large,the second revision is carried out,and the revised effect is obviously improved,and the error after revision is less than 1 K.

关 键 词：SST反演 GF-5 热红外遥感 单通道算法 算法修订 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]