version 2
Source: IERS Bulletin A (   0_   0_ )

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)  
51728.50  109262  277051  2041234    735  2121  2130    1528       0   0  0  0
51729.50  108741  276142  2039868   1997  4650  4650    4024       0   0  0  0
51730.50  108215  275284  2037329   3081  5407  5407    5946       0   0  0  0