Applying artificial neural network methodology to ocean color remote sensing

详细信息    查看全文

• 作者：Gross ; Lidwine ; Thiria ; Sylvie ; Frouin ; Robert
• 关键词：Ocean color ; Inversion ; Noise filtering ; Artificial neural networks
• 刊名：Ecological Modelling
• 出版年：1999
• 出版时间：August 17, 1999
• 年：1999
• 卷：120
• 期：2-3
• 页码：237-246
• 全文大小：173 K

文摘

Artificial neural networks (ANN) are widely used as continuous models to fit non-linear transfer functions. In this study we used ANN to retrieve chlorophyll pigments in the near-surface of oceans from Ocean Color measurements. This bio-optical inversion is established by analyzing concomitant sun-light spectral reflectances over the ocean surface and pigment concentration. The relationships are complex, non-linear, and their biological nature implies a significant variability. Moreover, the sun-light reflectances are usually measured by satellite radiometers flying at 800 km over the ocean surface, which affect the data by adding radiometric noise and atmospheric correction errors. By comparison with the polynomial fit usually employed to treat this problem, we show the advantages of neural function approximation like the association of non-linear complexity and noise filtering.