subsection Postprocess
  set List of postprocessors = gravity calculation,visualization

  subsection Gravity calculation
    set Sampling scheme = map
    set Minimum radius = 6621e3
    set Minimum longitude = -180
    set Maximum longitude = 179
    set Number points longitude = 180
    set Minimum latitude = -90
    set Maximum latitude = +90
    set Number points latitude  = 90
    set Quadrature degree increase = 1
  end
end
