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)  
51619.50   75147  355863  2879411   9381  2163  2138    1575       0   0  0  0
51620.50   75433  355080  2869203  11037  4650  4650    4024       0   0  0  0
51621.50   75759  354366  2857357  12655  5407  5407    5946       0   0  0  0