+__DREF91:__ The formulas for the transformation 'ITRF2008->DREF91' are provided by Peter Franke, BKG. The following 14 Helmert Transformation Parameters were introduced:
+

+

+Translation in X at epoch To: -0.0118 m +Translation in Y at epoch To: 0.1432 m +Translation in Z at epoch To: -0.1117 m +Translation rate in X: 0.0001 m/y +Translation rate in Y: 0.0001 m/y +Translation rate in Z: -0.0018 m/y +Rotation in X at epoch To: 3.291 mas +Rotation in Y at epoch To: 6.190 mas +Rotation in Z at epoch To: -11.012 mas +Rotation rate in X: 0.081 mas/y +Rotation rate in Y: 0.490 mas/y +Rotation rate in Z: -0.792 mas/y +Scale at epoch To : 0.00000001224 +Scale rate: 0.00000000008 /y +To: 2000.0