• Total mass — the displacement is computed with respect to the center of the total Earth's mass, including the mass of the fluid (atmosphere or water).
• Solid mass — the displacement is computed with respect to the center of the solid Earth's mass, excluding the mass of the fluid (atmosphere or water).
• Degree 1 term only — incomplete loading displacement that accounts only for the contribution of the degree-1 spherical harmonics to loading displacement: the difference in displacements with respect to the center of the solid Earth mass and the center of the total Earth mass. This displacement is equivalent to the displacement of the center of the solid Earth with respect to the center of the total Earth with the opposite sign. When this displacement is added to the displacement computed with respect to the center of mass of the total Earth including the mass of the atmosphere, the sum becomes the displacement with respect to the center of mass of the solid Earth, excluding the atmosphere.

It should be noted that the difference in displacements with respect to different origins is not small.

This page was prepared by Leonid Petrov ()
Last update: 2016.02.26_17:20:14