Transformation parameters from ITRF2014 to past ITRFs.  

Transformation parameters from ITRF2014 to past ITRFs.
----------------------------------------------------------------------------------------
SOLUTION         Tx       Ty       Tz        D        Rx        Ry        Rz      EPOCH
UNITS----------> mm       mm       mm       ppb       .001"     .001"     .001"
                 .        .        .         .        .         .         .
       RATES     Tx       Ty       Tz        D        Rx        Ry        Rz
UNITS----------> mm/y     mm/y     mm/y     ppb/y    .001"/y   .001"/y   .001"/y
-----------------------------------------------------------------------------------------
  ITRF2008        1.6      1.9      2.4     -0.02      0.00      0.00      0.00    2010.0
       rates      0.0      0.0     -0.1      0.03      0.00      0.00      0.00
  ITRF2005        2.6      1.0     -2.3      0.92      0.00      0.00      0.00    2010.0
       rates      0.3      0.0     -0.1      0.03      0.00      0.00      0.00
  ITRF2000        0.7      1.2    -26.1      2.12      0.00      0.00      0.00    2010.0
       rates      0.1      0.1     -1.9      0.11      0.00      0.00      0.00
  ITRF97          7.4     -0.5    -62.8      3.80      0.00      0.00      0.26    2010.0
       rates      0.1     -0.5     -3.3      0.12      0.00      0.00      0.02
  ITRF96          7.4     -0.5    -62.8      3.80      0.00      0.00      0.26    2010.0
       rates      0.1     -0.5     -3.3      0.12      0.00      0.00      0.02
  ITRF94          7.4     -0.5    -62.8      3.80      0.00      0.00      0.26    2010.0
       rates      0.1     -0.5     -3.3      0.12      0.00      0.00      0.02
  ITRF93        -50.4      3.3    -60.2      4.29     -2.81     -3.38      0.40    2010.0
       rates     -2.8     -0.1     -2.5      0.12     -0.11     -0.19      0.07
  ITRF92         15.4      1.5    -70.8      3.09      0.00      0.00      0.26    2010.0
       rates      0.1     -0.5     -3.3      0.12      0.00      0.00      0.02
  ITRF91         27.4     15.5    -76.8      4.49      0.00      0.00      0.26    2010.0
       rates      0.1     -0.5     -3.3      0.12      0.00      0.00      0.02
  ITRF90         25.4     11.5    -92.8      4.79      0.00      0.00      0.26    2010.0
       rates      0.1     -0.5     -3.3      0.12      0.00      0.00      0.02
  ITRF89         30.4     35.5   -130.8      8.19      0.00      0.00      0.26    2010.0
       rates      0.1     -0.5     -3.3      0.12      0.00      0.00      0.02
  ITRF88         25.4     -0.5   -154.8     11.29      0.10      0.00      0.26    2010.0
       rates      0.1     -0.5     -3.3      0.12      0.00      0.00      0.02
_________________________________________________________________________________________

Note : These parameters are derived from those already published in the IERS
Technical Notes and Annual Reports. The transformation parameters should be
used with the standard model (1) given below and are valid at the indicated
epoch.


: XS :    : X :   : Tx :   :  D   -Rz   Ry : : X :
:    :    :   :   :    :   :               : :   :
: YS :  = : Y : + : Ty : + :  Rz   D   -Rx : : Y :                       (1)
:    :    :   :   :    :   :               : :   :
: ZS :    : Z :   : Tz :   : -Ry   Rx   D  : : Z :


Where X,Y,Z are the coordinates in ITRF2014 and XS,YS,ZS are the coordinates in
the other frames.

On the other hand, for a given parameter P, its value at any epoch t
is obtained by using equation (2).

                  .
P(t) = P(EPOCH) + P * (t - EPOCH)                                        (2)


where EPOCH is the epoch indicated in the above table (currently 2010.0)
    .
and P is the rate of that parameter.