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)  
51618.50   75971  357559  2887114   9069  4650  4650    4024       0   0  0  0
51619.50   76655  357214  2877464  10231  5407  5407    5946       0   0  0  0
51620.50   77272  356829  2866457  11782  5953  5953    7669       0   0  0  0