摘要
为了实现低照度环境下遥感图像的正常采集,对遥感平台与遥感传感器进行了研究.分析对比了微小卫星平台现有遥感图像成像模式,利用敏捷性微小卫星平台,提出了在凝视模式下增加积分时间获取星载卫星低照度图像的方法,并对凝视情况下遥感图像信噪比进行建模和分析,给出了遥感图像信噪比与光学系统相对孔径、积分时间之间的函数关系.搭建了实验平台,可实现在低照度环境下进行不同积分时间的实际靶标图像采集及信噪比分析.
To acquire low-light remote sensing images,remote sensing platform and sensors are studied.By increasing integration time,low-light remote images are combined.In contrast to the current imaging models we have on satellite,a staring imaging model can achieve longer integer time.The new microsatellite platform can collect low-light remote image in this model.A mathematical model for signal-to-noise ratio is established to obtain functional relationship among relative optical aperture,integration time and signal-to-noise ratio.An experimental platform is setup to collect target images acquired in a low light environment with different integration time for analysis of signal-to-noise ratio.
出处
《应用科学学报》
CAS
CSCD
北大核心
2017年第1期90-98,共9页
Journal of Applied Sciences
基金
中国科学院青年创新促进会专项基金(No.Y62139w160)资助
关键词
遥感成像
低照度成像
积分时间
凝视模式
卫星姿态
信噪比
remote sensing image
low-light image
integration time
staring imaging model
satellite posture
signal-to-noise ratio
