Fig. 12From: Comparison of non-tidal loading data for application in a secular terrestrial reference frameDifferences between the fitted annual amplitudes \(A_1\) (left column) and annual phases \(\phi _1\) (right column) of Eq. (4) for the vertical displacements of the combined loading (NTAL + NTOL + HYDL [+ SLEL]) of ESMGFZ and GCTI20 in the CF-frame, and for the corresponding GNSS stations’ height residuals. Top row: ESMGFZ minus GNSS, middle row: GCTI20 minus GNSS, bottom row: ESMGFZ minus GCTI20Back to article page