-Because a mathematically strict transformation to a regional reference system is not possible in BNC when a significant scale factor is involved, the program follows an approximate solution. While orbits are transformed in full accordance with given equations, transformed clocks are derived through applying correction term +Because a mathematically strict transformation to a regional reference system is not possible on the BNC server side when a significant scale factor is involved, the program follows an approximate solution. While orbits are transformed in full accordance with given equations, transformed clocks are derived through applying correction term