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)  
51598.50   68328  365609  3074700  10183  2141  2115    1603       0   0  0  0
51599.50   68086  365018  3065150   8916  4650  4650    4024       0   0  0  0
51600.50   67941  364489  3056984   7416  5407  5407    5946       0   0  0  0