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)  
51557.50   46577  374624  3463784  11100  2131  2154    1549       0   0  0  0
51558.50   47561  374611  3452846  10776  4650  4650    4024       0   0  0  0
51559.50   48456  374543  3442485   9946  5407  5407    5946       0   0  0  0