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)  
51621.50   74199  354230  2860418  11211  2106  2127    1565       0   0  0  0
51622.50   74011  353546  2848544  12536  4650  4650    4024       0   0  0  0
51623.50   73913  352920  2835663  13227  5407  5407    5946       0   0  0  0