CHARACTERISTICS OF MAXIMUM-VALUE COMPOSITE IMAGES FROM TEMPORAL AVHRR DATA
CHARACTERISTICS OF MAXIMUM-VALUE COMPOSITE IMAGES FROM TEMPORAL AVHRR DATA
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DOI：
10.1080/01431168608948945
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发表时间：
1986-11-01
影响因子：
3.4
通讯作者：
HOLBEN, BN
中科院分区：
文献类型：
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作者：
HOLBEN, BN
来自先进的甚高分辨率辐射计传感器的红色和近红外卫星数据经过几天的处理，并结合在一起，在大片区域产生了空间上连续的无云图像，具有足够的时间分辨率，可以研究绿色植被的动态。这项技术最大限度地减少了云污染，减少了定向反射和离底观看效应，最大限度地减少了太阳角度和阴影效应，并最大限度地减少了气溶胶和水汽效应。这种改善在很大程度上取决于大气状态、表面覆盖类型以及太阳、目标和传感器的观察和照明几何形状。一个来自南部非洲的例子显示，从单个图像值到最终的合成图像，增加了40%。讨论了与该技术相关的局限性，并给出了改进该方法的建议
Red and near-infrared satellite data from the Advanced Very High Resolution Radiometer sensor have been processed over several days and combined to produce spatially continuous cloud-free imagery over large areas with sufficient temporal resolution to study green-vegetation dynamics. The technique minimizes cloud contamination, reduces directional reflectance and off-nadir viewing effects, minimizes sun-angle and shadow effects, and minimizes aerosol and water-vapour effects. The improvement is highly dependent on the state of the atmosphere, surface-cover type, and the viewing and illumination geometry of the sun, target and sensor. An example from southern Africa showed an increase of 40 per cent from individual image values to the final composite image. Limitations' associated with the technique are discussed, and recommendations are given to improve this approach