version 2
Source: IERS Bulletin A (2001_2001_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)  
51911.50  -72369  400005   920368   8033  2105  2110    1572       0   0  0  0
51912.50  -71739  401384   912045   8613  4650  4650    4024       0   0  0  0
51913.50  -71161  402803   903352   8772  5407  5407    5946       0   0  0  0