VIIRS Plus DMSP Change in Lights (VIIRS+DMSP dLIGHT)

The VIIRS Plus DMSP Change in Lights (VIIRS+DMSP dLIGHT) data set fuses nighttime lights imagery from the U.S. Air Force Defense Meteorological Satellite Program (DMSP) Operational Linescan System (OLS) with a stable night light composite from the next generation Suomi National Polar-orbiting Partnership (NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) Day-Night Band to map the spatial distribution and temporal evolution of global nighttime lights between 1992 and 2015. The product visualizes changes in both brightness and extent of nocturnal low lights over two decades while minimizing the spatial overextent (overglow) and bright saturation that compromise the DMSP-OLS composites. The map product utilizes annual DMSP-OLS stable lights composites, produced by the NOAA Earth Observation Group and archived at the NOAA National Geophysical Data Center (NGDC), in a tri-temporal global change map. To achieve greater spatial resolution and radiometric accuracy, the DMSP-OLS composites are co-registered and fused with the 2015 VIIRS annual composite from NGDC. The final product therefore retains the spatial detail and dynamic range of the VIIRS product, and the decadal change information from DMSP-OLS images.

VIIRS Plus DMSP 光照变化（VIIRS+DMSP dLIGHT）数据集融合了美国空军防御气象卫星计划（DMSP）操作线扫描系统（OLS）的夜间灯光影像与新一代苏omi国家极地轨道合作伙伴关系（NPP）可见红外成像辐射计套件（VIIRS）日夜波段稳定夜间灯光合成图像，以描绘1992年至2015年全球夜间灯光的空间分布和时空演变。该产品通过最小化损害DMSP-OLS合成的空间过度扩展（过度辉光）和亮度饱和，可视化了两十年间夜间低灯光的亮度和范围的变化。地图产品利用NOAA地球观测小组生产的年度DMSP-OLS稳定灯光合成图像，并存储于NOAA国家地球物理数据中心（NGDC），在三维时全球变化地图中。为了实现更高的空间分辨率和辐射测量精度，DMSP-OLS合成图像与NGDC的2015年VIIRS年度合成图像进行共注册和融合。因此，最终产品保留了VIIRS产品的空间细节和动态范围，以及DMSP-OLS图像的十年变化信息。