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)
51643.50   77896  344965  2669912   8160    56    49     134      72   0  0  0    400   -942     51     40
51644.50   78567  344029  2661807   7815    64    68      85      90   0  0  0   1032   -896     53     35
51645.50   79691  343594  2653783   8129    99    43      84     123   0  0  0   1359    -83    282     58
51646.50   80887  343577  2644909   9394    80    37      96     139   0  0  0   1222   -107    200     40
51647.50   81792  343684  2634965  10656    68    23      81      76   0  0  0    701    233    260    120
51648.50   82045  343974  2623413  12153    67    41      79      85   0  0  0     86    336    184    101
51649.50   82058  344210  2610180  13834    87    73     100      79   0  0  0    243     98    164     78