version 2
Source: IERS Bulletin A (2000_Jan_13)

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)  
51556.50   44995  374530  3475169  10453  2140  2156    1563       0   0  0  0
51557.50   45547  374460  3464509  10866  4650  4650    4024       0   0  0  0
51558.50   46052  374344  3453676  10800  5407  5407    5946       0   0  0  0