                                                                BULLETIN B 280
                                        			1 June 2011   
    
 Contents are described in ftp://hpiers.obspm.fr/iers/bul/bulb_new/bulletinb.pdf 
	
 1 - DAILY FINAL VALUES OF x, y, UT1-UTC, dX, dY
 Angular unit is milliarcsecond (mas), time unit is millisecond (ms). 
 Upgraded solution from February 1 2011 - consistent with ITRF 2008.
 
       DATE     MJD       x       y      UT1-UTC      dX     dY     x err    y err   UT1 err  X err  Y err
    (0 h UTC)            mas     mas       ms         mas    mas     mas      mas      ms     mas     mas

 Final values 

 Mean formal error      0.026    0.027    0.0059    0.041  0.071 
 
2011   4   2   55653  -34.729  280.642 -213.2020   -0.067 -0.099    0.050    0.051    0.0098  0.026  0.066
2011   4   3   55654  -36.200  281.946 -214.6833   -0.051 -0.164    0.046    0.048    0.0133  0.027  0.069
2011   4   4   55655  -37.484  283.622 -216.0584   -0.036 -0.232    0.041    0.043    0.0128  0.029  0.073
2011   4   5   55656  -39.373  285.426 -217.2537   -0.015 -0.288    0.042    0.044    0.0135  0.031  0.077
2011   4   6   55657  -41.395  287.005 -218.3242    0.023 -0.299    0.044    0.044    0.0126  0.032  0.080
2011   4   7   55658  -42.420  288.705 -219.2632    0.040 -0.337    0.044    0.043    0.0162  0.033  0.084
2011   4   8   55659  -42.955  290.933 -219.9945    0.049 -0.360    0.042    0.043    0.0040  0.035  0.088
2011   4   9   55660  -43.369  293.414 -220.7232    0.036 -0.358    0.043    0.043    0.0083  0.033  0.082
2011   4  10   55661  -43.327  295.697 -221.5012    0.013 -0.339    0.043    0.042    0.0129  0.029  0.073
2011   4  11   55662  -43.615  297.670 -222.3388   -0.009 -0.316    0.041    0.043    0.0091  0.025  0.064
2011   4  12   55663  -43.917  299.592 -223.3096   -0.035 -0.274    0.042    0.044    0.0020  0.021  0.054
2011   4  13   55664  -44.057  301.844 -224.4705   -0.100 -0.217    0.041    0.043    0.0052  0.017  0.043
2011   4  14   55665  -44.187  304.190 -225.8108   -0.174 -0.158    0.039    0.041    0.0083  0.019  0.049
2011   4  15   55666  -44.071  306.692 -227.3021   -0.242 -0.104    0.040    0.042    0.0025  0.022  0.056
2011   4  16   55667  -43.888  309.380 -228.9336   -0.248 -0.099    0.041    0.042    0.0061  0.021  0.053
2011   4  17   55668  -44.050  311.944 -230.5883   -0.225 -0.116    0.025    0.026    0.0063  0.019  0.047
2011   4  18   55669  -44.258  314.336 -232.1251   -0.193 -0.141    0.010    0.011    0.0029  0.022  0.056
2011   4  19   55670  -44.544  316.353 -233.4575   -0.158 -0.169    0.010    0.011    0.0015  0.019  0.048
2011   4  20   55671  -44.656  318.393 -234.5629   -0.171 -0.171    0.010    0.010    0.0009  0.029  0.074
2011   4  21   55672  -44.943  320.433 -235.4512   -0.180 -0.208    0.010    0.010    0.0019  0.032  0.081
2011   4  22   55673  -45.068  322.209 -236.1882   -0.182 -0.258    0.010    0.010    0.0042  0.032  0.080
2011   4  23   55674  -45.242  323.935 -236.9074   -0.184 -0.303    0.010    0.010    0.0050  0.032  0.080
2011   4  24   55675  -45.848  325.797 -237.7005   -0.184 -0.337    0.010    0.010    0.0037  0.031  0.079
2011   4  25   55676  -46.171  327.498 -238.5595   -0.181 -0.366    0.010    0.010    0.0033  0.031  0.078
2011   4  26   55677  -46.020  329.198 -239.5203   -0.175 -0.366    0.010    0.009    0.0021  0.031  0.077
2011   4  27   55678  -45.763  331.317 -240.5563   -0.160 -0.347    0.010    0.009    0.0009  0.030  0.076
2011   4  28   55679  -45.337  333.596 -241.6538   -0.168 -0.207    0.010    0.010    0.0007  0.034  0.085
2011   4  29   55680  -45.114  336.139 -242.7748   -0.178 -0.034    0.010    0.011    0.0008  0.038  0.096
2011   4  30   55681  -44.690  338.523 -243.8777   -0.174  0.003    0.010    0.011    0.0026  0.036  0.091
2011   5   1   55682  -44.018  341.136 -244.9186   -0.165 -0.017    0.010    0.011    0.0032  0.032  0.081

 Preliminary extension 
2011   5   2   55683  -43.225  344.026 -245.9039   -0.156 -0.046    0.010    0.010    0.0021  0.028  0.071
2011   5   3   55684  -42.676  346.734 -246.8451   -0.142 -0.084    0.009    0.009    0.0010  0.024  0.060
2011   5   4   55685  -42.417  349.087 -247.7529   -0.223 -0.072    0.009    0.009    0.0045  0.031  0.077
2011   5   5   55686  -41.903  351.251 -248.6046   -0.321 -0.048    0.009    0.009    0.0054  0.040  0.100
2011   5   6   55687  -41.648  353.454 -249.4075   -0.409 -0.026    0.009    0.009    0.0020  0.049  0.124
2011   5   7   55688  -41.487  355.340 -250.2175   -0.401 -0.028    0.009    0.009    0.0020  0.048  0.120
2011   5   8   55689  -41.721  357.311 -251.0795   -0.356 -0.040    0.010    0.010    0.0026  0.042  0.105
2011   5   9   55690  -41.763  358.967 -252.0923   -0.313 -0.052    0.010    0.010    0.0021  0.036  0.091
2011   5  10   55691  -41.179  360.751 -253.3296   -0.274 -0.066    0.010    0.009    0.0012  0.030  0.076
2011   5  11   55692  -39.855  362.888 -254.7652   -0.306 -0.086    0.010    0.009    0.0020  0.027  0.069
2011   5  12   55693  -38.471  365.427 -256.3725   -0.361 -0.107    0.009    0.009    0.0020  0.025  0.063
2011   5  13   55694  -36.570  368.202 -258.1440   -0.422 -0.130    0.010    0.009    0.0009  0.023  0.058
2011   5  14   55695  -34.781  371.157 -260.0519   -0.004  0.019    0.010    0.009    0.0018  0.032  0.081
2011   5  15   55696  -33.352  374.068 -261.8390   -0.004  0.020    0.119    0.105    0.0100  0.036  0.090
2011   5  16   55697  -32.546  376.417 -263.4361   -0.004  0.020    0.215    0.169    0.0123  0.036  0.090
2011   5  17   55698  -31.900  378.042 -264.8299   -0.004  0.020    0.180    0.127    0.0098  0.036  0.090
2011   5  18   55699  -31.271  379.977 -266.0054   -0.004  0.020    0.153    0.119    0.0089  0.036  0.090
2011   5  19   55700  -30.656  381.642 -267.0094   -0.004  0.020    0.137    0.131    0.0152  0.036  0.090
2011   5  20   55701  -29.838  383.277 -267.7720   -0.005  0.020    0.153    0.138    0.0130  0.036  0.090
2011   5  21   55702  -28.971  384.816 -268.5789   -0.004  0.020    0.141    0.108    0.0160  0.036  0.090
2011   5  22   55703  -28.062  386.237 -269.3899   -0.004  0.020    0.153    0.112    0.0112  0.036  0.090
2011   5  23   55704  -26.776  387.726 -270.1991   -0.004  0.020    0.204    0.096    0.0119  0.036  0.090
2011   5  24   55705  -25.416  389.270 -271.0689   -0.005  0.020    0.172    0.123    0.0133  0.036  0.090
2011   5  25   55706  -23.669  390.894 -271.9898   -0.005  0.020    0.180    0.181    0.0081  0.036  0.090
2011   5  26   55707  -21.950  393.134 -272.9002   -0.005  0.020    0.180    0.135    0.0114  0.036  0.090
2011   5  27   55708  -20.311  395.578 -273.8960   -0.005  0.020    0.169    0.132    0.0269  0.036  0.090
2011   5  28   55709  -19.019  397.379 -274.8783   -0.005  0.020    0.187    0.138    0.0204  0.036  0.090
2011   5  29   55710  -17.936  398.972 -275.7330   -0.005  0.020    0.173    0.124    0.0285  0.036  0.090
2011   5  30   55711  -17.207  400.691 -276.5157   -0.004  0.020    0.150    0.165    0.1016  0.036  0.090
2011   5  31   55712  -16.600  402.140 -277.2308   -0.005  0.020    0.281    0.377    0.1016  0.036  0.090
2011   6   1   55713  -15.949  403.591 -277.8111    0.001  0.002 1000.000 1000.000 1000.0000 397.800 1000.000
 
	
 2 - DAILY FINAL VALUES OF CELESTIAL POLE OFFSETS dPsi1980 & dEps1980
  dPsi1980   dEps1980 ....dPsi,dEps / IAU 1980 precession-nutation model      
 Description : ftp://hpiers.obspm.fr/iers/bul/bulb_new/bulletinb.pdf
 The Reference Systems are described in the 2006 IERS Annual Report.
 
       DATE     MJD    dPsi1980   dEps1980  sig dPsi  sig dEps   
    (0 h UTC)             mas        mas      mas       mas   

2011   4   2   55653   -65.630    -9.987     0.098     0.066
2011   4   3   55654   -65.535   -10.126     0.104     0.069
2011   4   4   55655   -65.518   -10.472     0.111     0.073
2011   4   5   55656   -65.438   -10.852     0.116     0.077
2011   4   6   55657   -65.200   -11.073     0.122     0.080
2011   4   7   55658   -64.972   -11.204     0.128     0.084
2011   4   8   55659   -64.880   -11.309     0.133     0.088
2011   4   9   55660   -65.050   -11.420     0.122     0.082
2011   4  10   55661   -65.326   -11.479     0.104     0.073
2011   4  11   55662   -65.454   -11.461     0.087     0.064
2011   4  12   55663   -65.357   -11.430     0.068     0.054
2011   4  13   55664   -65.211   -11.455     0.063     0.043
2011   4  14   55665   -65.095   -11.432     0.073     0.049
2011   4  15   55666   -65.146   -11.178     0.082     0.056
2011   4  16   55667   -65.335   -10.792     0.080     0.053
2011   4  17   55668   -65.659   -10.567     0.073     0.047
2011   4  18   55669   -65.901   -10.693     0.079     0.056
2011   4  19   55670   -65.907   -11.017     0.071     0.048
2011   4  20   55671   -65.854   -11.240     0.115     0.074
2011   4  21   55672   -65.665   -11.370     0.126     0.081
2011   4  22   55673   -65.342   -11.496     0.121     0.080
2011   4  23   55674   -65.067   -11.633     0.116     0.080
2011   4  24   55675   -65.138   -11.702     0.112     0.079
2011   4  25   55676   -65.576   -11.697     0.108     0.078
2011   4  26   55677   -65.974   -11.676     0.103     0.077
2011   4  27   55678   -65.909   -11.689     0.098     0.076
2011   4  28   55679   -65.507   -11.558     0.112     0.085
2011   4  29   55680   -65.121   -11.296     0.130     0.096
2011   4  30   55681   -65.004   -11.139     0.125     0.091
2011   5   1   55682   -65.153   -11.167     0.110     0.081

 
 3 - EARTH ANGULAR VELOCITY : DAILY FINAL VALUES OF LOD, OMEGA AT 0hUTC
 
 LOD     : Excess of the Length of day - 86400 s TAI 
 OMEGA   : Earth angular velocity  
 Description: ftp://hpiers.obspm.fr/iers/bul/bulb_new/bulletinb.pdf
 
    DATE        MJD     LOD     sigma      OMEGA           sigma        
 (0 h UTC)              ms       ms        mas/ms          mas/ms

2011   4   2   55653  1.4911  0.0096  15.04106691909    0.00000000167 
2011   4   3   55654  1.4364  0.0091  15.04106692861    0.00000000158 
2011   4   4   55655  1.3027  0.0102  15.04106695189    0.00000000178 
2011   4   5   55656  1.1316  0.0107  15.04106698167    0.00000000186 
2011   4   6   55657  0.9764  0.0111  15.04106700869    0.00000000193 
2011   4   7   55658  0.8173  0.0111  15.04106703639    0.00000000193 
2011   4   8   55659  0.7289  0.0110  15.04106705178    0.00000000191 
2011   4   9   55660  0.7568  0.0095  15.04106704692    0.00000000165 
2011   4  10   55661  0.8225  0.0088  15.04106703548    0.00000000153 
2011   4  11   55662  0.9108  0.0101  15.04106702011    0.00000000176 
2011   4  12   55663  1.0861  0.0104  15.04106698960    0.00000000181 
2011   4  13   55664  1.2665  0.0103  15.04106695819    0.00000000179 
2011   4  14   55665  1.4165  0.0100  15.04106693208    0.00000000174 
2011   4  15   55666  1.5815  0.0100  15.04106690335    0.00000000174 
2011   4  16   55667  1.6685  0.0089  15.04106688821    0.00000000155 
2011   4  17   55668  1.6137  0.0051  15.04106689775    0.00000000089 
2011   4  18   55669  1.4380  0.0026  15.04106692833    0.00000000045 
2011   4  19   55670  1.2212  0.0027  15.04106696608    0.00000000047 
2011   4  20   55671  0.9743  0.0027  15.04106700906    0.00000000047 
2011   4  21   55672  0.7908  0.0027  15.04106704100    0.00000000047 
2011   4  22   55673  0.7030  0.0027  15.04106705629    0.00000000047 
2011   4  23   55674  0.7207  0.0026  15.04106705321    0.00000000045 
2011   4  24   55675  0.8311  0.0025  15.04106703399    0.00000000044 
2011   4  25   55676  0.9177  0.0025  15.04106701891    0.00000000044 
2011   4  26   55677  1.0008  0.0025  15.04106700444    0.00000000044 
2011   4  27   55678  1.0757  0.0025  15.04106699141    0.00000000044 
2011   4  28   55679  1.1122  0.0026  15.04106698505    0.00000000045 
2011   4  29   55680  1.1361  0.0026  15.04106698089    0.00000000045 
2011   4  30   55681  1.0800  0.0026  15.04106699066    0.00000000045 
2011   5   1   55682  0.9977  0.0026  15.04106700498    0.00000000045 


 4 - INFORMATION ON TIME SCALES      
     TAI - UTC = 34 s.  No leap second introduced during period [55653-55682]
     All information concerning time scales : 
	 - leap seconds announcements : Bulletin C 
	 - DUT1 announcements (UT1-UTC with 0.1 ms accuracy) : Bulletin D
      can be found at : 
         - web site : http://hpiers.obspm.fr/eop-pc/
         - anonymous ftp : hpiers.obspm.fr/iers/ or 145.238.100.28


 5 - SUMMARY OF CONTRIBUTED EARTH ORIENTATION PARAMETERS SERIES
 This section gives the average precision of the individual series, some of them
 contributing to the combination (*) and their average agreement with it. 
 The period covered is that one of Bulletin B. 
 
    Units :  micro-arc-seconds for x/y/dX/dY        micro-seconds for UT1/LOD
-----------------------------------------------------------------------------
  EOP series             first line  : Mean  formal  uncertainty
  Periods covered        second line : Weighted RMS agreement with Bulletin B
-----------------------------------------------------------------------------
                                x     y    UT1   LOD   dX    dY   Data Number		

 VLBI Standards
   AUS   1 R  1               132    99     4     -    94    95       8
   55656.21 to 55680.27       184   274    19     -   153   169

   BKG   8 R  2               120   108     4     -    81    80       8
   55656.21 to 55680.27       141   198     8     -    73    36

   GSFC  9 R  4                76    67     2     7    59    59       9
   55656.21 to 55680.27        49   149     6    11    46    48

   IAA   5 R  2                79    67     2     -    52    54       8
   55656.21 to 55680.27       465   234    11     -   164    93

   SPBU  3 R  3               161   124     4     -   115   117       2
   55659.27 to 55666.27         0     0     0     -     0     0

   USNO 10 R  1               101    87     3     -    77    80       8
   55656.21 to 55680.27       309   611    32     -   167   134

   MAO   3 R  1                94    76     3     -    60    61       8
   55656.25 to 55680.28       214   104     8     -   134   117

   IVS   2 R  1 *              75    64     2     -    20    51       8
   55656.21 to 55680.27       124   148     7     -    41     9


 VLBI Intensive
   BKG   3 R  2 *               -     -    13     -     -     -      27
   55653.33 to 55681.33         -     -    14     -     -     -

   GSFC  9 R  2 *               -     -    14     -     -     -      27
   55653.33 to 55681.33         -     -    12     -     -     -

   IAA   5 R  1 *               -     -    14     -     -     -      24
   55653.33 to 55681.33         -     -    18     -     -     -

   PUL  10 R  0                 -     -    13     -     -     -      26
   55653.33 to 55681.33         -     -    14     -     -     -

   USNO  5 R  1 *               -     -    14     -     -     -      27
   55653.33 to 55681.33         -     -    11     -     -     -


 GPS
   CODE 98 P  1                 5     5     -     2     -     -      29
   55653.50 to 55681.50        17    19     -    11     -     -

   JPL  96 P  3                 9     9     -     6     -     -      29
   55653.50 to 55681.50        49    48     -    18     -     -

   GFZ  96 P  2                 5     6     -     1     -     -      29
   55653.50 to 55681.50        38    34     -    18     -     -

   ESOC 96 P  1                12     9     -     1     -     -      29
   55653.50 to 55681.50        42    41     -     9     -     -

   NOAA 96 P  1                 2     3     -    36     -     -      29
   55653.50 to 55681.50        42    46     -     8     -     -

   SIO  96 P  1                15    15     -     4     -     -      29
   55653.50 to 55681.50        47    35     -    14     -     -

   EMR  96 P  3                32    33     -     6     -     -      29
   55653.50 to 55681.50        56    31     -    16     -     -

   IAA   1 P  1                32    38     -     7     -     -      29
   55653.50 to 55681.50        99   116     -    37     -     -

   IGR  96 P  2 *              25    19     -     6     -     -      29
   55653.50 to 55681.50        34    24     -     7     -     -

   IGS   7 P  1 *              16    16     -     4     -     -      29
   55653.50 to 55681.50        23    16     -     4     -     -


 SLR
   MCC  97 L  1               144   176     -    21     -     -      30
   55653.00 to 55682.00       116   125     -   166     -     -

   IAA   2 L  1                31    38     -     1     -     -      30
   55653.00 to 55682.00       137    95     -    18     -     -

   ASI   3 L  2                77   103     -    20     -     -      29
   55653.50 to 55681.50       152   345     -    61     -     -

   PUL  10 L  0                36    44     -     2     -     -      29
   55653.61 to 55681.44       138   131     -    17     -     -

   ILRS  5 L  1 *              58    70     -    13     -     -      28
   55654.50 to 55681.50       145   164     -    29     -     -


 BULLETIN A
   NEOS 97 C  1                33    28     5     -     -     -      30
   55653.00 to 55682.00        21    16     8     -     -     -

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