摘要
为了改善光学遥感卫星的成像质量,提升卫星操控的灵活性,基于遥感成像理论,提出了依据太阳高度角的卫星在轨成像参数自主调整方法。文中首先讨论了影响卫星遥感成像质量的因素,分析了入瞳辐亮度随太阳高度角的变化规律及在不同侧摆角时,一个轨道周期内相机积分时间的变化范围,并据此建立了太阳高度角、侧摆角与积分级数、增益的对应关系。然后分析了太阳高度角和侧摆角的最佳分挡策略,最终得到了可用于卫星在轨成像参数自主调整的二维查找表,以实现卫星在轨成像参数自主调整。利用该方法可提升图像的辐射质量,极大减少了地面上注的数据量。
A method for autonomous imaging parameters’adjustment based on solar elevation from remote sensing theory is proposed in this paper.The factors which influence imaging quality and the relationship between apparent radiance and solar elevation are firstly discussed.Then,the integral time change under different roll angles in one orbital period and the internal links among solar elevation,roll angle,integral grade and gain are analyzed.Finally,the best grading strategy is obtained and the two-dimensional lookup table which can be used for the autonomous imaging parameters’adjustment is built.The use of twodimensional lookup table improves the image radiation quality and fairly reduces satellite’s control workload.
作者
曹启鹏
董小静
韩杏子
尹欢
CAO Qipeng;DONG Xiaojing;HAN Xingzi;YIN Huan(DFH Satellite Co.Ltd.,Beijing,100094,China)
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2019年第S01期73-77,共5页
Journal of Nanjing University of Aeronautics & Astronautics
关键词
成像参数
太阳高度角
积分级数
增益
imaging parameter
solar elevation
integral grade
gain
