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Table 4

Error in the predicted sodium abundance (A(Na)) obtained using the RBF and FFNN interpolation models for verification stars excluded from the training set.

Model λ[Å] Method Sun PLATO1 PLATO2 PLATO3
Direct synthesis 6.24 6.50 5.72 4.22
5682 RBF 0.025 −0.003 0.007 0.003
FFNN 0.003 −0.004 0.016 −0.006
5688 RBF 0.026 0.002 0.007 0.005
FFNN −0.007 0.001 0.012 0.002
5889 RBF 0.014 0.023 0.004 0.010
FFNN 0.013 0.019 0.010 0.003
5896 RBF 0.014 0.019 0.005 0.009
FFNN 0.014 −0.016 0.011 0.009
6154 RBF 0.028 0.003 0.001 0.004
FFNN −0.020 0.004 0.002 −0.003
6160 RBF 0.019 −0.006 0.003 0.006
FFNN −0.014 0.010 0.002 0.001
8183 RBF 0.030 0.004 0.007 0.014
FFNN 0.009 0.006 0.017 0.008
8194 RBF 0.034 0.008 0.007 0.023
FFNN −0.017 0.008 0.015 0.001
10747 RBF 0.022 0.009 0.001 0.001
FFNN −0.015 0.001 0.001 −0.009

Notes. The first row (‘Direct synthesis’) displays the input abundances, while subsequent rows show the deviation from the reference values (∆A(Na)). The stellar parameters of the verification stars are presented in Fig. 3.

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