Fig. 1. Laboratory hyperspectral data measured by ASD geophysical spectrometer

Fig. 2. Simulation flow chart

Fig. 3. Intra-pupillary irradiance L(λ)toa_1nm

Fig. 4. Simulated signal-to-noise ratio curve

Fig. 5. Simulated spectral data curves obtained by adding atmospheric effects and the influence of the signal-to-noise characteristics of the instrument

Fig. 6. Weighted regression coefficient curve

Fig. 7. SOM inversion results for laboratory hyperspectral data

Fig. 8. RMSE variation curve with SR

Fig. 9. Surface plot of RMSE vs. SR， WSNR

Fig. 10. 2D projection of 3D surface on RMSE， SR

Fig. 11. 2D projection of 3D surfaces on RMSE， WSNR

Fig. 12. Signal-to-noise ratio curve corresponding to SR=15 nm and WSNR=477.31