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)  
51666.50   89843  336563  2425359  14780  2116  2128    1553       0   0  0  0
51667.50   90238  336024  2410944  14051  4650  4650    4024       0   0  0  0
51668.50   90566  335415  2397763  12310  5407  5407    5946       0   0  0  0