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Fig. 2

image

Simplified structure of the neural network. The input layer provides the hidden layer s data points per sample. It is equal to 200 and 60 for the full B-DM and Gaia wavelength ranges, respectively. The hidden layer has r neurons, which is equal to 30 or 20 in our implementation. Finally, the output layer has as many neurons as there are output classes, represented by c. Therefore, c is equal to 11 for the reduced VisNIR set.

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