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)  
51599.50   67784  365001  3065185   8787  2136  2124    1598       0   0  0  0
51600.50   67429  364431  3056984   7614  4650  4650    4024       0   0  0  0
51601.50   67178  363921  3049944   6467  5407  5407    5946       0   0  0  0