version 2
Source: IERS Bulletin A (2000_Jan_12)

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)  
51555.50   44097  373989  3485820   9357  2143  2127    1532       0   0  0  0
51556.50   44428  373515  3475901  10481  4650  4650    4024       0   0  0  0
51557.50   44801  373108  3465076  11169  5407  5407    5946       0   0  0  0