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http://dx.doi.org/10.7780/kjrs.2017.33.2.4

Application of Satellite Data Spatiotemporal Fusion in Predicting Seasonal NDVI  

Jin, Yihua (Interdisciplinary Program in Landscape Architecture, Seoul National University)
Zhu, Jingrong (Graduate School, Seoul National University)
Sung, Sunyong (Interdisciplinary Program in Landscape Architecture, Seoul National University)
Lee, Dong Kun (Department of Landscape Architecture and Rural System Engineering, Seoul National University)
Publication Information
Korean Journal of Remote Sensing / v.33, no.2, 2017 , pp. 149-158 More about this Journal
Abstract
Fine temporal and spatial resolution of image data are necessary to monitor the phenology of vegetation. However, there is no single sensor provides fine temporal and spatial resolution. For solve this limitation, researches on spatiotemporal data fusion methods are being conducted. Among them, FSDAF (Flexible spatiotemporal data fusion) can fuse each band in high accuracy.In thisstudy, we applied MODIS NDVI and Landsat NDVI to enhance time resolution of NDVI based on FSDAF algorithm. Then we proposed the possibility of utilization in vegetation phenology monitoring. As a result of FSDAF method, the predicted NDVI from January to December well reflect the seasonal characteristics of broadleaf forest, evergreen forest and farmland. The RMSE values between predicted NDVI and actual NDVI (Landsat NDVI) of August and October were 0.049 and 0.085, and the correlation coefficients were 0.765 and 0.642 respectively. Spatiotemporal data fusion method is a pixel-based fusion technique that can be applied to variousspatial resolution images, and expected to be applied to various vegetation-related studies.
Keywords
Phenology; Vegetation index; Satellite image fusion; MODIS; Landsat;
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