version 2
Source: Xpole,Ypole,Xrt,Yrt,LOD: weighted average of centres;
        UT1-UTC: integrated from the 5th day prior to Bull. A
                 last non-predicted value.

Orbits: to be used with the IGS Final Orbits

  MJD      Xpole   Ypole  UT1-UTC    LOD  Xsig  Ysig   UTsig  LODsig  Nr Nf Nt    Xrt    Yrt  Xrtsig  Yrtsig
             (10**-6")       (0.1 usec)    (10**-6")     (0.1 usec)              (10**-6"/d)    (10**-6"/d)
51881.50  -80931  341482  1149915   9610    86    26     139      70   0  0  0   -136   1771    122     87
51882.50  -81063  343133  1139732  10863    81    28     110      88   0  0  0   -431   1617    102    122
51883.50  -81541  344819  1128397  11732    92    39     107     100   0  0  0   -557   1842     92    116
51884.50  -82061  346424  1115673  13144    83    33     102      55   0  0  0   -477   1745     72     77
51885.50  -82564  348271  1102631  13486    64    51     100      39   0  0  0   -530   2120     85     81
51886.50  -83100  350192  1089744  12706    76    42     108      69   0  0  0   -534   2119     85     81
51887.50  -83581  352045  1077413  11628    92    43     104      30   0  0  0   -371   1834    180    106