Technology and Methodology |
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THE APPLICATION OF TIME-SERIES FOURIER ANALYSIS TO
RECONSTRUCTING CLOUD-FREE NDVI IMAGES |
WANG Dan 1,2, JIANG Xiao-guang 1, TANG Ling-li 1, XI Xiao-huan 1 |
1.China Remote Sensing Satellite Ground Station, Beijing 100086, China; 2.Graduate School of Chinese Academy of Science, Beijing 100039, China |
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Abstract This paper applied the Harmonic Analysis of Time Series (HANTS) algorithm based on Fourier transformation
to predigest and compress the NOAA/AVHRR Normalized Difference Vegetation Index (NDVI) time-series images, and at the
same time, wipe off and fill in the data where cloud cover and misdata are examined. The HANTS algorithm outputs such
Fourier components as amplitude components and phase components. A fit curve is built according to the Fourier
components. Temporal interpolation according to the curve makes it possible to reconstruct the sequential time-series
images.
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Issue Date: 31 July 2009
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