Abstract
Fraction of absorbed photosynthetically active radiation (FPAR) refers to the ratio of photosynthetically active radiation (PAR) absorbed by the green part of the vegetation canopy to the total PAR. Accurate and quantitative monitoring of rice FPAR is of great significance for cultivation management and yield estimation. High spatial and temporal resolution optical images, and all-time all-weather radar images are widely used in crop monitoring. In this study, a rice FPAR synergistic inversion model was established using a combination of optical and radar remote sensing dataset. The results suggest that the estimated FPAR is more approximate to the measured values, compared with the commonly used MODIS FPAR product. The FPAR spatiotemporal distribution maps are generated based on the synergistic inversion model.
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