The ocean surface can be characterized by one-dimensional spectrum models. Among them, the Goda and Elfouhaily spectra are well applied for remote sensing simulations. However, they do not consider the sea state factor well. In this research, based on them, we apply the spectra measured from the Surface Waves Investigation and Monitoring instrument and establish a Combined Spectrum. Validation indicates the established spectrum is closer to the SWIM described sea surface with varied sea states.