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)
51615.50   73674  358834  2914291   9790    53    45     227      51   0  0  0    789   -109     50    105
51616.50   74303  358400  2904956   8737    97    63     158     132   0  0  0    411   -412    223    100
51617.50   74628  357761  2896840   7800   113    65     177     208   0  0  0     49   -596    169    164
51618.50   74819  356841  2888834   8076    59    56     137     133   0  0  0    410  -1043    102    223
51619.50   74834  355946  2880527   8710    48    58     154     167   0  0  0   -319   -556    194    212
51620.50   74389  355307  2871648   9362    73    65     122      98   0  0  0   -298   -656     37    163
51621.50   74160  354474  2862234   9788    77    81     179     186   0  0  0    -93   -626    142    253