version 2
Source: IERS Bulletin A (2000_Jan_06)

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)  
51549.50   42958  376117  3520769   4132  2113  2126    1573       0   0  0  0
51550.50   42813  375888  3516318   4771  4650  4650    4024       0   0  0  0
51551.50   42760  375690  3511041   5782  5407  5407    5946       0   0  0  0