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)  
51667.50   90534  336596  2410680  14355  2114  2117    1517       0   0  0  0
51668.50   91070  336282  2397017  12970  4650  4650    4024       0   0  0  0
51669.50   91524  335878  2385095  10875  5407  5407    5946       0   0  0  0