version 2
Source: IERS Bulletin A (   0_   0_ )

Orbits: to be used with the IGS Rapid Service Orbits (IGR)

  MJD      Xpole   Ypole  UT1-UTC    LOD  Xsig  Ysig   UTsig  LODsig  Nr Nf Nt
             (10**-6")       (0.1 usec)    (10**-6")    (0.1 usec)  
51644.50   78491  343945  2662198   7491    42    57      72       0   0  0  0
51645.50   79082  343144  2654775   7354  2120  2122    1527       0   0  0  0
51646.50   79637  342397  2647204   7789  4650  4650    4024       0   0  0  0