version 2
Source: IERS Bulletin A (2000_Jan_11)

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)  
51554.50   43196  374711  3494407   8255  2130  2142    1552       0   0  0  0
51555.50   43000  374338  3485402   9756  4650  4650    4024       0   0  0  0
51556.50   42900  374020  3475069  10911  5407  5407    5946       0   0  0  0