version 2
Source: IERS Bulletin A (2000_2000_2)

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)  
51908.50  -74691  395413   939846   4826  2114  2104    1554       0   0  0  0
51909.50  -74394  397135   934180   6506  4650  4650    4024       0   0  0  0
51910.50  -74122  398794   926977   7901  5407  5407    5946       0   0  0  0