                                                                BULLETIN B 220
                                                            1 june 2006         

    Contents are described in the Explanatory Supplement available at
    http://hpiers.obspm.fr/eop-pc/
      
 1 - EARTH ORIENTATION PARAMETERS (IERS evaluation).
     The values in this section are samplings of section 2 given at five-day 
     intervals. 

    Date    MJD       x       y    UT1R-UTC    UT1R-TAI    dPsi dEpsilon
    2006              "       "        s           s     0.001"   0.001"
   (0h UTC)
  
 Final Bulletin B values.
  
  APR  14  53839  0.10320 0.36751  0.254824  -32.745176   -53.6    -5.2
  APR  19  53844  0.10223 0.36526  0.250105  -32.749895   -53.8    -6.0
  APR  24  53849  0.10564 0.36287  0.245099  -32.754901   -52.6    -6.4
  
  APR  29  53854  0.10854 0.36124  0.239468  -32.760532   -54.3    -5.7
  MAY   4  53859  0.10967 0.35802  0.233268  -32.766732   -53.3    -6.7
  
 Preliminary extension, to be updated weekly in Bulletin A and monthly
  in Bulletin B.
  
  MAY   9  53864  0.10803 0.35283  0.227232  -32.772768   -53.3    -5.8
  MAY  14  53869  0.10861 0.34990  0.220862  -32.779138   -54.3    -6.3
  MAY  19  53874  0.11137 0.34625  0.214785  -32.785215   -53.5    -6.7
  
  MAY  24  53879  0.11357 0.34337  0.210181  -32.789819   -54.3    -5.6
  MAY  29  53884  0.11841 0.33791  0.205932  -32.794068   -55.0    -6.3
  JUN   3  53889  0.12047 0.33401  0.202656  -32.797344   -54.8    -5.9
  JUN   8  53894  0.12187 0.33037  0.200085  -32.799915   -55.6    -5.4
  JUN  13  53899  0.12261 0.32696  0.198536  -32.801464   -56.9    -5.9
  
  JUN  18  53904  0.12316 0.32356  0.197826  -32.802174   -56.7    -5.6
  JUN  23  53909  0.12336 0.32014  0.197796  -32.802204   -57.9    -5.2
  JUN  28  53914  0.12322 0.31668  0.198315  -32.801685   -58.3    -6.1
  JUL   3  53919  0.12270 0.31318  0.199253  -32.800747   -59.0    -5.3
  JUL   8  53924  0.12180 0.30968  0.200512  -32.799488   -60.9    -5.5
  
  JUL  13  53929  0.12049 0.30619  0.201977  -32.798023   -60.8    -5.5
  JUL  18  53934  0.11877 0.30274  0.203579  -32.796421   -62.2    -5.5
  JUL  23  53939  0.11660 0.29936  0.205227  -32.794773   -63.0    -5.5
  JUL  28  53944  0.11401 0.29608  0.206844  -32.793156   -62.9    -5.3
                                                            
 Note. In UT1R, the effects of zonal tides with periods shorter than 35 days
 are removed ; UT1-UT1R (smaller than 0.0025s in absolute value) should be  
 added after quadratic interpolation of UT1R. Section 2 of this Bulletin gives 
 the daily interpolation of x, y, UT1, duration of day, dPsi, and dEpsilon.
  
                                                             IERS, B 220 (2)
 2 - SMOOTHED VALUES OF x, y, UT1, D, DPSI, DEPSILON (IERS EVALUATION)
 at one-day intervals. For smoothing characteristics, see Table2 in the
 explanatory supplement. The reference system is described in the 2004
 IERS Annual Report.
    2006     MJD       x        y     UT1-UTC UT1-UT1R   D    dPsi dEpsilon
    (0 h UTC)          "        "        s       ms     ms  0.001"  0.001"
  APR   4   53829  0.10406  0.37271  0.263951 -1.009   0.549  -54.8   -5.9
  APR   5   53830  0.10443  0.37235  0.263419 -0.461   0.536  -54.4   -6.1
  APR   6   53831  0.10450  0.37190  0.262851  0.044   0.598  -54.1   -6.1
  APR   7   53832  0.10428  0.37171  0.262204  0.435   0.706  -53.8   -6.0
  APR   8   53833  0.10410  0.37141  0.261428  0.669   0.880  -53.6   -5.8
  APR   9   53834  0.10430  0.37085  0.260443  0.730   1.084  -53.4   -5.5
  APR  10   53835  0.10442  0.37034  0.259268  0.626   1.213  -53.4   -5.2
  APR  11   53836  0.10403  0.36950  0.258033  0.393   1.258  -53.4   -5.1
  APR  12   53837  0.10361  0.36860  0.256773  0.087   1.263  -53.4   -5.0
  APR  13   53838  0.10343  0.36801  0.255532 -0.222   1.216  -53.5   -5.1
  APR  14   53839  0.10320  0.36751  0.254364 -0.460   1.107  -53.6   -5.2
  APR  15   53840  0.10252  0.36693  0.253338 -0.562   0.941  -53.8   -5.3
  APR  16   53841  0.10193  0.36632  0.252492 -0.484   0.753  -54.0   -5.4
  APR  17   53842  0.10194  0.36599  0.251828 -0.217   0.588  -54.1   -5.6
  APR  18   53843  0.10207  0.36580  0.251299  0.209   0.485  -54.0   -5.8
  APR  19   53844  0.10223  0.36526  0.250827  0.721   0.472  -53.8   -6.0
  APR  20   53845  0.10290  0.36457  0.250316  1.213   0.561  -53.4   -6.3
  APR  21   53846  0.10372  0.36413  0.249663  1.562   0.750  -53.0   -6.5
  APR  22   53847  0.10438  0.36380  0.248784  1.659   1.041  -52.7   -6.6
  APR  23   53848  0.10505  0.36341  0.247571  1.442   1.391  -52.5   -6.5
  APR  24   53849  0.10564  0.36287  0.246019  0.920   1.675  -52.6   -6.4
  APR  25   53850  0.10600  0.36234  0.244265  0.188   1.812  -52.9   -6.1
  APR  26   53851  0.10623  0.36195  0.242454 -0.597   1.825  -53.3   -5.8
  APR  27   53852  0.10651  0.36170  0.240672 -1.260   1.718  -53.7   -5.6
  APR  28   53853  0.10732  0.36153  0.239053 -1.663   1.476  -54.1   -5.6
  APR  29   53854  0.10854  0.36124  0.237726 -1.743   1.157  -54.3   -5.7
  APR  30   53855  0.10945  0.36076  0.236718 -1.524   0.872  -54.2   -6.0
  MAY   1   53856  0.10980  0.36018  0.235946 -1.094   0.722  -54.0   -6.4
  MAY   2   53857  0.10992  0.35961  0.235234 -0.569   0.716  -53.7   -6.6
  MAY   3   53858  0.10991  0.35898  0.234480 -0.057   0.792  -53.5   -6.7
  MAY   4   53859  0.10967  0.35802  0.233627  0.359   0.921  -53.3   -6.7
  MAY   5   53860  0.10921  0.35690  0.232627  0.627   1.041  -53.2   -6.4
  MAY   6   53861  0.10878  0.35561  0.231542  0.725   1.202  -53.1   -6.2
  MAY   7   53862  0.10862  0.35436  0.230229  0.658   1.350  -53.1   -6.0
  MAY   8   53863  0.10834  0.35352  0.228856  0.453   1.428  -53.1   -5.8
  MAY   9   53864  0.10803  0.35283  0.227391  0.159   1.492  -53.3   -5.8
  MAY  10   53865  0.10777  0.35219  0.225895 -0.159   1.514  -53.5   -5.9
  MAY  11   53866  0.10755  0.35181  0.224387 -0.432   1.489  -53.7   -6.0
  MAY  12   53867  0.10751  0.35150  0.222939 -0.590   1.371  -54.0   -6.1
  MAY  13   53868  0.10784  0.35078  0.221659 -0.580   1.229  -54.2   -6.2
  MAY  14   53869  0.10861  0.34990  0.220483 -0.379   1.048  -54.3   -6.3
  MAY  15   53870  0.10970  0.34919  0.219548 -0.004   0.858  -54.3   -6.4
  MAY  16   53871  0.11074  0.34867  0.218737  0.479   0.760  -54.2   -6.5
  MAY  17   53872  0.11111  0.34800  0.217989  0.969   0.745  -54.0   -6.5
  MAY  18   53873  0.11118  0.34713  0.217208  1.346   0.834  -53.8   -6.6
  MAY  19   53874  0.11137  0.34625  0.216290  1.505   1.024  -53.5   -6.7
  MAY  20   53875  0.11161  0.34552  0.215149  1.381   1.249  -53.6   -6.3
  MAY  21   53876  0.11194  0.34509  0.213804  0.975   1.439  -53.5   -6.2
  MAY  22   53877  0.11231  0.34467  0.212305  0.353   1.565  -53.6   -6.1
  MAY  23   53878  0.11286  0.34413  0.210722 -0.361   1.594  -53.9   -5.8
  MAY  24   53879  0.11357  0.34337  0.209168 -1.013   1.476  -54.3   -5.6
  MAY  25   53880  0.11441  0.34229  0.207810 -1.468   1.232  -54.6   -5.5
                                                             IERS, B 220 (3)
  
  
 3 - NORMAL VALUES OF THE EARTH ORIENTATION PARAMETERS AT FIVE-DAY INTERVALS 
       (IERS evaluation).
  
                        Raw normal values                     Uncertainties
  
  
   2006   MJD      x       y     UT1-UTC   dPsi  dEps    x    y   UT1 dPsi dEps
    (0 h UTC)      "       "        s       0.001"       0.001" 0.0001s  0.001"
  
 APR  4 53829  0.10406 0.37273  0.263950 -54.73 -5.95  0.01 0.01 0.02 0.05 0.02
 APR  9 53834  0.10430 0.37086  0.260439 -53.42 -5.51  0.02 0.02 0.01 0.07 0.03
 APR 14 53839  0.10319 0.36751  0.254364 -53.64 -5.24  0.01 0.02 0.02 0.10 0.05
 APR 19 53844  0.10222 0.36526  0.250827 -53.88 -6.01  0.01 0.02 0.01 0.05 0.02
 APR 24 53849  0.10565 0.36287  0.246019 -52.57 -6.38  0.01 0.01 0.02 0.06 0.03
  
 APR 29 53854  0.10854 0.36124  0.237713 -54.31 -5.69  0.02 0.02 0.02 0.11 0.06
 MAY  4 53859  0.10966 0.35803  0.233622 -53.28 -6.64  0.02 0.02 0.02 0.08 0.03
 MAY  9 53864  0.10803 0.35282  0.227396 -53.24 -5.83  0.01 0.01 0.02 0.05 0.03
 MAY 14 53869  0.10862 0.34991  0.220477 -54.29 -6.32  0.02 0.02 0.02 0.09 0.04
 MAY 19 53874  0.11136 0.34624  0.216289 -53.43 -6.74  0.01 0.01 0.02 0.07 0.04
  
 MAY 24 53879  0.11358 0.34337  0.209166    -     -    0.02 0.02 0.02  -    -  
  
  
 4 - DURATION OF THE DAY AND ANGULAR VELOCITY OF THE EARTH (IERS evaluation).
     The data of this section are smoothed, with the same characteristics as 
 UT1R in section 1. They are corrected for the effects of zonal tides with 
 periods up to 35 days. Section 2 gives the daily interpolation of D.
  
        Date (0h UTC)              DR              OmegaR   
        2006    MJD                s            (microrad/s)
                             
  
      APR  4   53829             0.00109         72.921  15054
      APR  9   53834             0.00106                 15057
      APR 14   53839             0.00093                 15068
      APR 19   53844             0.00100                 15062
      APR 24   53849             0.00103                 15060
  
      APR 29   53854             0.00124                 15042
      MAY  4   53859             0.00127                 15039
   
   
  
  5 - INFORMATION ON TIME SCALES 
      A leap second was introduced in UTC on 31 December 2005.      
      No leap second will be introduced in UTC on 30 June 2006.        
      All information concerning time scales : announcements of the
      leap seconds (Bulletin C) and of the value of DUT1 (Bulletin D)
      can be found in our web/ftp site :

      World Wide Web : http://hpiers.obspm.fr
      Anonymous ftp  : hpiers.obspm.fr or 145.238.100.28



                                                             IERS, B 220 (4)
       6 - SUMMARY OF CONTRIBUTED EARTH ORIENTATION PARAMETERS SERIES
     This section gives the average precision of the individual series contri-
 buting to the combination and their average agreement with it. The periods
 covered start at the beginning of the first month in Section 1 and end with 
 the last available value in the individual series considered.
     The complete list of measurements is  available in the electronic-mailed
 version of Bulletin B in section 7.
    Units : 0.001" for x,y , 0.0001s for UT1, 0.001" for dPsi, dEpsi.
--------------------------------------------------------------------------------
  EOP series                      Mean  formal  uncertainty
  Periods covered                 Weighted RMS agreement with Bulletin B
--------------------------------------------------------------------------------
                                   x     y     UT    D   dPsi  dEps Data Number
 VLBI      
   EOP(AUS)  1  R 1              0.10  0.09  0.04   -    0.20  0.09      14
   53829.20 to 53874.27          0.15  0.16  0.09   -    0.40  0.08

   EOP(BKG)  3  R 4              0.08  0.08  0.03   -    0.14  0.06      13
   53829.20 to 53871.21          0.11  0.15  0.06   -    0.13  0.03

   EOP(BKG)  3  R 2               -     -    0.11   -     -     -        44
   53829.79 to 53879.79           -     -    0.23   -     -     -  

   EOP(USNO) 5  R 1               -     -    0.12   -     -     -        46
   53829.79 to 53879.79           -     -    0.18   -     -     -  

   EOP(GSFC) 4  R 2              0.07  0.07  0.03   -    0.14  0.06      14
   53829.20 to 53874.27          0.11  0.11  0.18   -    0.13  0.03

   EOP(GSFC) 4  R 1               -     -    0.12   -     -     -        44
   53829.79 to 53879.79           -     -    0.22   -     -     -  

   EOP(IAA)  5  R 2              0.08  0.08  0.04   -     -	-  	 13
   53829.20 to 53874.27          0.11  0.19  0.07   -     -	-  

   EOP(IAA)  5  R 1               -     -    0.11   -     -     -        44
   53829.79 to 53879.79           -     -    0.18   -     -     -  

   EOP(SPBU) 3  R 3              0.26  0.31  0.16   -    0.07  0.03      13
   53829.20 to 53871.21          0.20  0.20  0.11   -    0.16  0.06

   EOP(SPBU) 2  R 1               -     -    0.13   -     -     -        41
   53829.79 to 53876.33           -     -    0.19   -     -     -  

   EOP(MAO)  3  R 1              0.09  0.09  0.04   -     -	-  	 13
   53829.23 to 53871.21          0.12  0.19  0.08   -     -	-  

   EOP(USNO) 6  R 1              0.08  0.08  0.04   -    0.17  0.07      14
   53829.20 to 53874.27          0.14  0.15  0.08   -    0.10  0.07

   EOP(IVS)  0  R 1              0.04  0.04  0.02   -    0.08  0.04       9
   53829.00 to 53860.00          0.14  0.29  0.08   -    0.08  0.06

 GPS       
   EOP(CODE) 98 P 1              0.01  0.01   -    0.07   -     -        51
   53829.50 to 53879.50          0.07  0.06   -    0.24   -     -  

   EOP(EMR)  96 P 3              0.03  0.03   -    0.04   -     -        51
   53829.50 to 53879.50          0.08  0.06   -    0.49   -     -  

   EOP(ESOC) 96 P 1              0.01  0.01   -    0.04   -     -        51
   53829.50 to 53879.50          0.05  0.09   -    0.28   -     -  

   EOP(GFZ)  96 P 2              0.01  0.01   -    0.02   -     -        51
   53829.50 to 53879.50          0.05  0.05   -    0.32   -     -  

   EOP(IAA)  1  P 1              0.03  0.03   -    0.06   -     -        51
   53829.50 to 53879.50          0.14  0.25   -    0.70   -     -  

   EOP(JPL)  96 P 3              0.02  0.02   -    0.13   -     -        47
   53829.50 to 53875.50          0.05  0.04   -    0.50   -     -  

   EOP(NOAA) 96 P 1              0.00  0.00   -    0.02   -     -        26
   53829.50 to 53854.50          0.07  0.15   -    0.32   -     -  

   EOP(SIO)  96 P 1              0.02  0.02   -    0.00   -     -        51
   53829.50 to 53879.50          0.24  0.24   -    0.57   -     -  

   EOP(IGS F)95 P 2              0.02  0.02  0.09  0.04   -     -        40
   53829.50 to 53868.50          0.03  0.07  0.20  0.17   -     -  

   EOP(IGS R)96 P 2              0.04  0.04  0.19  0.06   -     -        51
   53829.50 to 53879.50          0.04  0.04  0.72  0.18   -     -  

   EOP(IERS) 97 P 1              0.03  0.03  0.19  0.13   -     -        51
   53829.50 to 53879.50          0.02  0.03  0.20  0.19   -     -  

 SLR       
   EOP(ASI)  3  L 2              0.07  0.07   -    0.16   -     -        51
   53829.50 to 53879.50          0.19  0.24   -    0.49   -     -  

   EOP(DUT)  98 L 1              0.09  0.08   -     -     -     -        45
   53829.00 to 53880.00          0.46  0.34   -     -     -     -  

   EOP(IAA)  2  L 1              0.03  0.04  0.02  0.02   -     -        52
   53829.00 to 53880.00          0.18  0.25  0.22  0.13   -     -  

   EOP(MCC)  97 L 1              0.15  0.16   -    0.10   -     -        52
   53829.00 to 53880.00          0.18  0.16   -    0.19   -     -  

   EOP(ILRS) 5  L 1              0.06  0.06   -    0.14   -     -        47
   53829.50 to 53875.50          0.14  0.13   -    0.50   -     -  

 Bulletin A
   EOP(NEOS) 97 C 1              0.04  0.05  0.09   -     -     -        52
   53829.00 to 53880.00          0.07  0.10  0.16   -     -     -  

