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)  
51881.50  -80980  341119  1149642   9725  2114  2113     110       0   0  0  0
51882.50  -81276  342658  1139196  11167  4650  4650     101       0   0  0  0
51883.50  -81611  344154  1127374  12477  5407  5407      99       0   0  0  0