中国区域DMSP/OLS夜间灯光影像的校正

美国国防军事气象卫星（DMSP）搭载的线性扫描系统（OLS）获取的夜间灯光影像具有很强的光电放大能力，存储量小，可直观反映人类活动，被广泛应用于城镇化监测、社会经济因素估算等方面。但是获取这些数据集的各传感器均未经过星上定标，存在像元饱和问题，并且传感器获得的1992—2013年的各数据之间缺乏可比性、连续性，无法直接用于长时间序列的研究，因此需要对长时间序列的DMSP/OLS夜间灯光影像进行校正处理。校正内容包括中国区域各灯光影像间的相互校正、饱和校正、年内融合、年际间校正等；并对校正后的DMSP/OLS夜间灯光影像进行合理性检验，检验结果表明该校正方法是可行的。

Correction of nighttime light images of DMSP/OLS in China

The nighttime light images acquired by the operational linescan system (OLS) equipped with the Defense Meteorological Satellite Program (DMSP) have strong photoelectric amplification capability, small storage capacity and can directly reflect human activities. It is applied to urbanization monitoring and social and economic factors estimation. However, each sensor that obtains these data sets has not been scaled on the star, there is a problem of pixel saturation, and these data obtained by the sensors lacks comparability and continuity from 1992 to 2013 and cannot be directly used for long-term sequences. The study therefore requires the correction of long-term sequence DMSP/OLS nighttime light images. The correction includes mutual correction, saturation correction, annual fusion, inter-annual correction, etc. among the various light images in China. And the rationality test of the corrected DMSP/OLS nighttime light images. The test results show that the calibration method is feasible.