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)  
51574.50   56769  375658  3286594   6748  2140  2114    1842       0   0  0  0
51575.50   56647  375406  3280011   6418  4650  4650    4024       0   0  0  0
51576.50   56616  375151  3273573   6458  5407  5407    5946       0   0  0  0