version 2
Source: IERS Bulletin A (2000_Jan_08)

Orbits: to be used with the IGS Prediction Service Orbits (IGP)

  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   43797  375949  3513098   4879  2124  2124    1566       0   0  0  0
51552.50   44090  375823  3507580   6156  4650  4650    4024       0   0  0  0
51553.50   44427  375668  3500566   7872  5407  5407    5946       0   0  0  0