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)  
51597.50   68942  366337  3085529  11294  2131  2128    1565       0   0  0  0
51598.50   68921  365790  3074833  10099  4650  4650    4024       0   0  0  0
51599.50   68982  365300  3065511   8544  5407  5407    5946       0   0  0  0