version 2
Source: IERS Bulletin A (2000_2000_2)

Orbits: to be used with the IGS Final Service Orbits

  MJD      Xpole   Ypole  UT1-UTC    LOD  Xsig  Ysig   UTsig  LODsig  Nr Nf Nt
             (10**-6")       (0.1 usec)    (10**-6")    (0.1 usec)  
51551.50   43740  375879  3513119   4553    88    68     243       0   0  0  0
51552.50   43690  375534  3508078   5528    89    83     238       0   0  0  0
51553.50   43621  375072  3501893   6843    92    95     188       0   0  0  0
51554.50   43854  374699  3494290   8363    99   115     156       0   0  0  0
51555.50   44547  374561  3485162   9892    97   133     163       0   0  0  0
51556.50   45658  374574  3474650  11133    82   149     185       0   0  0  0
51557.50   46942  374597  3463180  11806   100   163     255       0   0  0  0
51558.50   48107  374631  3451414  11726   129   176     303       0   0  0  0
51559.50   49124  374720  3440077  10949   136   182     303       0   0  0  0