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)  
51587.50   66535  370236  3174919   9317  2128  2124    1663       0   0  0  0
51588.50   66763  369932  3165870   8780  4650  4650    4024       0   0  0  0
51589.50   67049  369642  3157254   8451  5407  5407    5946       0   0  0  0