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)
51664.50   88773  337852  2453830  13325    44    65     259      62   0  0  0    825   -510    115     59
51665.50   89379  337483  2439892  14570    32    59     157      63   0  0  0    432   -410     56     90
51666.50   89863  337151  2425033  15168    40    66     187      82   0  0  0    504   -327     75     59
51667.50   90040  336659  2410036  14937    23    57     172      95   0  0  0   -110   -528    117     68
51668.50   89715  335807  2395641  13867    45    51     172     111   0  0  0   -538  -1145     64    101
51669.50   89265  334605  2382824  12057    48    86     156      44   0  0  0   -250  -1002    100     74
51670.50   88879  333635  2371889  10264    63    72     163      85   0  0  0   -475   -708     75     70