FY-3气象卫星可见光红外扫描辐射计冷空间基准采样区观测到月球后的现象研究
投稿时间:2020-06-19  修订日期:2020-09-10  点此下载全文
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作者单位E-mail
张锷 中国科学院上海技术物理研究所红外探测与成像技术重点实验室 zeshcn@126.com 
陈帅帅 中国科学院上海技术物理研究所红外探测与成像技术重点实验室  
张里阳 国家卫星气象中心  
中文摘要:FY-3气象卫星可见光红外扫描辐射计(VIRR)冷空间基准采样区在特定时刻观测到月球,使得该时刻遥感图像出现地球区信号码值减小甚至无码值的条带状异常区域,对遥感数据产生影响。本文根据VIRR轨道运行特点、在轨工作模式和冷空间数据采样机理,分析了VIRR冷空间采样区观测到月球并影响遥感数据的原因,阐述了VIRR扫描镜像旋转引起冷空间采样时月球图像通道间配准错位的机理,通过卫星轨道仿真计算了一年周期内出现此种现象的时间及规律,对受影响的遥感数据提出了处理建议,对数据修正作了初步尝试并对数据修正的可能性作了分析。
中文关键词:可见光红外扫描辐射计  冷空间  基准采样  月球
 
Study on the phenomena of lunar observation in cold space reference sampling area of Visible and Infrared Radiometer on FY-3 Meteorological Satellite
Abstract:The moon is observed at a specific time in the cold space reference sampling area of the Visible Infrared Radiometer (VIRR) of FY-3 meteorological satellite, which makes the remote sensing image appear abnormal area of strip image with reduced or even no code value in the earth region at that time, which has an impact on the remote sensing data. Based on the characteristics of VIRR orbit operation, on orbit working mode and cold space data sampling mechanism, this paper analyzes the reasons why the moon is observed in the cold space sampling area of VIRR and affects the remote sensing data. The mechanism of registration dislocation between lunar image channels caused by the rotation of VIRR scanning image in cold space sampling is expounded. The time and regularity of this phenomenon in one year period are calculated by satellite orbit simulation. The processing suggestions for the affected remote sensing data are put forward. The preliminary attempt of data correction is made and the possibility of data correction is analyzed.
keywords:Visible and Infrared Radiometer  cold space  reference sampling  moon
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