Correlation matrix of estimated parameters from the 2W mode, highlighting significant off-diagonal correlations among tidal Love numbers (k₂₂, k₃₁, k₃₃, k₄₂, k₄₄) and gravity field coefficients (C_2,0 to C_40,0, C_2,1, C_2,2, S_2,1, and S_2,2). The correlations reflect parameter interdependence that may affect estimation robustness. A notable decrease in correlation is observed beyond degree 12, suggesting improved parameter separability at higher degrees.