                                                                BULLETIN B 291
                                        			1 May 2012   
    
 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      0.020    0.023    0.0070    0.062  0.083 
 
2012   3   2   55988   18.937  275.646 -473.1884    0.111 -0.303    0.023    0.025    0.0040  0.141  0.216
2012   3   3   55989   18.563  277.173 -473.5285    0.089 -0.259    0.023    0.025    0.0039  0.136  0.192
2012   3   4   55990   17.782  278.172 -473.9946    0.063 -0.232    0.023    0.025    0.0043  0.120  0.144
2012   3   5   55991   17.387  279.057 -474.6191    0.063 -0.317    0.021    0.024    0.0040  0.114  0.146
2012   3   6   55992   16.938  279.996 -475.4440    0.053 -0.354    0.021    0.024    0.0023  0.103  0.126
2012   3   7   55993   15.713  280.781 -476.4778    0.055 -0.372    0.021    0.023    0.0253  0.089  0.107
2012   3   8   55994   14.414  281.463 -477.6973    0.064 -0.383    0.021    0.023    0.0110  0.072  0.087
2012   3   9   55995   13.219  282.526 -479.0665    0.076 -0.390    0.021    0.023    0.0027  0.056  0.068
2012   3  10   55996   12.112  283.779 -480.5270    0.089 -0.393    0.021    0.023    0.0048  0.054  0.065
2012   3  11   55997   11.081  285.000 -481.9953    0.101 -0.387    0.021    0.023    0.0064  0.056  0.069
2012   3  12   55998    9.693  286.339 -483.3724    0.111 -0.366    0.022    0.024    0.0076  0.060  0.074
2012   3  13   55999    8.716  287.402 -484.6160    0.115 -0.333    0.022    0.024    0.0076  0.062  0.077
2012   3  14   56000    7.787  288.851 -485.7658    0.113 -0.287    0.021    0.023    0.0023  0.066  0.081
2012   3  15   56001    6.396  290.088 -486.8843    0.123 -0.261    0.021    0.023    0.0239  0.051  0.067
2012   3  16   56002    4.961  291.305 -488.0525    0.131 -0.237    0.021    0.023    0.0022  0.033  0.048
2012   3  17   56003    3.408  292.453 -489.3520    0.134 -0.231    0.021    0.023    0.0060  0.032  0.048
2012   3  18   56004    1.664  293.818 -490.7959    0.132 -0.232    0.021    0.023    0.0098  0.039  0.056
2012   3  19   56005   -0.066  295.068 -492.3400    0.127 -0.233    0.021    0.024    0.0088  0.045  0.064
2012   3  20   56006   -1.503  295.981 -493.9230    0.118 -0.230    0.021    0.024    0.0033  0.052  0.071
2012   3  21   56007   -2.628  296.959 -495.4831    0.104 -0.200    0.020    0.023    0.0308  0.047  0.066
2012   3  22   56008   -3.668  298.210 -496.9786    0.091 -0.163    0.020    0.023    0.0074  0.040  0.057
2012   3  23   56009   -4.461  299.582 -498.3959    0.078 -0.125    0.020    0.023    0.0032  0.033  0.048
2012   3  24   56010   -4.601  300.921 -499.7354    0.129 -0.121    0.020    0.023    0.0040  0.031  0.045
2012   3  25   56011   -5.048  302.625 -500.9856    0.203 -0.130    0.020    0.023    0.0065  0.031  0.045
2012   3  26   56012   -5.769  303.991 -502.1345    0.295 -0.150    0.020    0.024    0.0060  0.030  0.043
2012   3  27   56013   -6.669  305.064 -503.1977    0.361 -0.174    0.020    0.024    0.0022  0.030  0.042
2012   3  28   56014   -7.584  305.823 -504.2043    0.324 -0.259    0.019    0.023    0.0037  0.043  0.058
2012   3  29   56015   -8.111  307.058 -505.1893    0.254 -0.355    0.019    0.023    0.0051  0.057  0.076
2012   3  30   56016   -8.824  308.790 -506.1999    0.176 -0.439    0.019    0.023    0.0024  0.072  0.093
2012   3  31   56017   -9.569  310.658 -507.2863    0.149 -0.438    0.019    0.023    0.0018  0.076  0.103
2012   4   1   56018  -10.272  312.753 -508.5085    0.142 -0.392    0.019    0.023    0.0044  0.077  0.111

 Preliminary extension 
2012   4   2   56019  -11.351  314.853 -509.8935    0.136 -0.317    0.020    0.023    0.0059  0.068  0.114
2012   4   3   56020  -12.264  316.855 -511.4393    0.140 -0.253    0.020    0.023    0.0029  0.068  0.121
2012   4   4   56021  -12.891  318.655 -513.1549    0.264 -0.238    0.020    0.023    0.0228  0.072  0.127
2012   4   5   56022  -13.368  320.312 -514.9928    0.414 -0.235    0.020    0.023    0.0018  0.076  0.134
2012   4   6   56023  -13.710  322.167 -516.8596    0.416 -0.259    0.020    0.023    0.0191  0.072  0.129
2012   4   7   56024  -13.657  324.150 -518.6314    0.353 -0.289    0.022    0.023    0.0083  0.066  0.120
2012   4   8   56025  -13.092  325.975 -520.2019    0.276 -0.315    0.022    0.023    0.0074  0.059  0.110
2012   4   9   56026  -12.298  327.895 -521.5379    0.191 -0.333    0.020    0.023    0.0069  0.053  0.101
2012   4  10   56027  -11.614  330.091 -522.6739    0.103 -0.345    0.020    0.023    0.0046  0.047  0.092
2012   4  11   56028  -10.891  332.536 -523.7003    0.017 -0.350    0.020    0.023    0.0026  0.040  0.082
2012   4  12   56029   -9.891  334.818 -524.7324   -0.004 -0.343    0.020    0.023    0.0176  0.027  0.054
2012   4  13   56030   -8.880  337.106 -525.8409    0.000 -0.336    0.020    0.023    0.0025  0.011  0.021
2012   4  14   56031   -8.009  339.142 -527.0342    0.002  0.002    0.020    0.023    0.0039  0.048  0.057
2012   4  15   56032   -7.221  341.121 -528.2914    0.002  0.002    0.363    0.155    0.0064  0.063  0.074
2012   4  16   56033   -6.300  342.959 -529.5897    0.002  0.002    0.610    0.334    0.0073  0.063  0.074
2012   4  17   56034   -5.197  344.945 -530.9075    0.002  0.002    0.628    0.392    0.0084  0.063  0.074
2012   4  18   56035   -4.224  347.160 -532.2220    0.002  0.002    0.557    0.382    0.0062  0.063  0.074
2012   4  19   56036   -3.437  349.521 -533.5068    0.002  0.002    0.371    0.296    0.0068  0.063  0.074
2012   4  20   56037   -2.825  351.967 -534.7309    0.002  0.002    0.354    0.201    0.0108  0.063  0.074
2012   4  21   56038   -2.349  354.200 -535.8604    0.002  0.002    0.477    0.258    0.0087  0.063  0.074
2012   4  22   56039   -1.463  356.005 -536.8881    0.002  0.002    0.636    0.401    0.0054  0.063  0.074
2012   4  23   56040   -0.254  357.970 -537.8142    0.002  0.002    0.583    0.420    0.0095  0.063  0.074
2012   4  24   56041    0.689  359.959 -538.6414    0.002  0.002    0.468    0.401    0.0114  0.063  0.074
2012   4  25   56042    1.394  361.778 -539.4095    0.002  0.002    0.434    0.450    0.0061  0.063  0.074
2012   4  26   56043    2.198  363.412 -540.1527    0.002  0.002    0.412    0.377    0.0063  0.063  0.074
2012   4  27   56044    3.383  364.828 -540.9070    0.002  0.002    0.370    0.445    0.0095  0.063  0.074
2012   4  28   56045    4.388  366.246 -541.6866    0.002  0.002    0.465    0.571    0.0075  0.063  0.074
2012   4  29   56046    5.307  367.430 -542.5549    0.002  0.002    0.486    0.582    0.0357  0.063  0.074
2012   4  30   56047    6.243  368.851 -543.6124    0.002  0.002    1.120    1.234    0.0980  0.063  0.074
2012   5   1   56048    7.012  370.526 -544.8969    0.002  0.002    1.839    1.829    0.0555  0.063  0.074
 
	
 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   

2012   3   2   55988   -70.932   -10.371     0.354     0.216
2012   3   3   55989   -70.970   -10.250     0.343     0.192
2012   3   4   55990   -70.983   -10.112     0.301     0.144
2012   3   5   55991   -70.883   -10.243     0.286     0.146
2012   3   6   55992   -70.723   -10.455     0.260     0.126
2012   3   7   55993   -70.413   -10.529     0.223     0.107
2012   3   8   55994   -70.091   -10.305     0.182     0.087
2012   3   9   55995   -69.995    -9.941     0.141     0.068
2012   3  10   55996   -70.203    -9.770     0.135     0.065
2012   3  11   55997   -70.524    -9.939     0.142     0.069
2012   3  12   55998   -70.703   -10.287     0.150     0.074
2012   3  13   55999   -70.680   -10.585     0.157     0.077
2012   3  14   56000   -70.593   -10.746     0.165     0.081
2012   3  15   56001   -70.551   -10.853     0.129     0.067
2012   3  16   56002   -70.625   -10.941     0.082     0.048
2012   3  17   56003   -70.713   -11.022     0.081     0.048
2012   3  18   56004   -70.676   -11.058     0.098     0.056
2012   3  19   56005   -70.509   -11.020     0.114     0.064
2012   3  20   56006   -70.350   -10.905     0.130     0.071
2012   3  21   56007   -70.283   -10.736     0.119     0.066
2012   3  22   56008   -70.261   -10.623     0.101     0.057
2012   3  23   56009   -70.228   -10.657     0.082     0.048
2012   3  24   56010   -70.034   -10.870     0.077     0.045
2012   3  25   56011   -69.791   -11.147     0.078     0.045
2012   3  26   56012   -69.449   -11.395     0.076     0.043
2012   3  27   56013   -69.090   -11.610     0.075     0.042
2012   3  28   56014   -69.008   -11.905     0.107     0.058
2012   3  29   56015   -69.165   -12.207     0.143     0.076
2012   3  30   56016   -69.447   -12.356     0.180     0.093
2012   3  31   56017   -69.494   -12.188     0.192     0.103
2012   4   1   56018   -69.294   -11.868     0.194     0.111

 
 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

2012   3   2   55988  0.2932  0.0022  15.04106712763    0.00000000038 
2012   3   3   55989  0.3928  0.0022  15.04106711029    0.00000000038 
2012   3   4   55990  0.5434  0.0022  15.04106708407    0.00000000038 
2012   3   5   55991  0.7031  0.0021  15.04106705627    0.00000000037 
2012   3   6   55992  0.9276  0.0021  15.04106701719    0.00000000037 
2012   3   7   55993  1.1170  0.0021  15.04106698422    0.00000000037 
2012   3   8   55994  1.2909  0.0021  15.04106695394    0.00000000037 
2012   3   9   55995  1.4230  0.0021  15.04106693095    0.00000000037 
2012   3  10   55996  1.4563  0.0021  15.04106692515    0.00000000037 
2012   3  11   55997  1.4503  0.0021  15.04106692619    0.00000000037 
2012   3  12   55998  1.2916  0.0023  15.04106695382    0.00000000040 
2012   3  13   55999  1.1775  0.0023  15.04106697368    0.00000000040 
2012   3  14   56000  1.1305  0.0022  15.04106698187    0.00000000038 
2012   3  15   56001  1.1365  0.0022  15.04106698082    0.00000000038 
2012   3  16   56002  1.2366  0.0022  15.04106696340    0.00000000038 
2012   3  17   56003  1.3827  0.0022  15.04106693796    0.00000000038 
2012   3  18   56004  1.4974  0.0022  15.04106691799    0.00000000038 
2012   3  19   56005  1.5768  0.0023  15.04106690417    0.00000000040 
2012   3  20   56006  1.5941  0.0023  15.04106690116    0.00000000040 
2012   3  21   56007  1.5507  0.0022  15.04106690871    0.00000000038 
2012   3  22   56008  1.4646  0.0022  15.04106692370    0.00000000038 
2012   3  23   56009  1.3760  0.0022  15.04106693913    0.00000000038 
2012   3  24   56010  1.3061  0.0022  15.04106695130    0.00000000038 
2012   3  25   56011  1.2063  0.0018  15.04106696867    0.00000000031 
2012   3  26   56012  1.1041  0.0015  15.04106698646    0.00000000026 
2012   3  27   56013  1.0361  0.0015  15.04106699830    0.00000000026 
2012   3  28   56014  1.0024  0.0015  15.04106700417    0.00000000026 
2012   3  29   56015  0.9960  0.0015  15.04106700528    0.00000000026 
2012   3  30   56016  1.0312  0.0015  15.04106699915    0.00000000026 
2012   3  31   56017  1.1621  0.0015  15.04106697636    0.00000000026 
2012   4   1   56018  1.3212  0.0018  15.04106694867    0.00000000031 


 4 - INFORMATION ON TIME SCALES      
     TAI - UTC = 34 s.  No leap second introduced during period [55988-56018]
     All information concerning time scales : 
	 - leap seconds announcements : Bulletin C 
	 - DUT1 announcements (UT1-UTC with 0.1 s 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               152   130     6     -   109   112       9
   55988.27 to 56016.27       298   612    18     -   205   238

   BKG   8 R  2               121   115     4     -    71    62       9
   55988.27 to 56016.27       158   230     6     -    95    48

   GSFC  9 R  4               184   148     7    22   107    94      10
   55988.27 to 56016.27       335   234     7    19   106   100

   IAA   5 R  2                83    87     4     -    62    63       9
   55988.27 to 56016.27       119   163     8     -   107   114

   IAA   5 R  2                83    87     4     -    62    63       9
   55988.27 to 56016.27       119   163     8     -   107   114

   USNO 10 R  1               122   114     4     -    91    86       9
   55988.27 to 56016.27       187    91     6     -    42    66

   MAO   3 R  1               103    99     4     -    58    56       9
   55988.29 to 56016.25        55   124    10     -    79   122

   IVS   2 R  1 *              61    61     3     -    20    51       9
   55988.27 to 56016.27        79   198     1     -     9     5


 VLBI Intensive
   BKG   3 R  2 *               -     -    13     -     -     -      26
   55988.80 to 56017.27         -     -    19     -     -     -

   GSFC  9 R  2 *               -     -    13     -     -     -      26
   55988.80 to 56017.27         -     -    19     -     -     -

   IAA   5 R  1 *               -     -    12     -     -     -      23
   55989.27 to 56017.27         -     -    21     -     -     -

   PUL  10 R  0                 -     -    23     -     -     -      26
   55988.80 to 56017.27         -     -    17     -     -     -

   USNO  5 R  1 *               -     -    12     -     -     -      26
   55988.80 to 56017.27         -     -    19     -     -     -


 GPS
   CODE 98 P  1                 5     5     -     2     -     -      30
   55988.50 to 56017.50        24    24     -    10     -     -

   JPL  96 P  3                 8     8     -     7     -     -      30
   55988.50 to 56017.50        38    41     -    12     -     -

   GFZ  96 P  2                 5     5     -     1     -     -      30
   55988.50 to 56017.50        37    31     -    10     -     -

   ESOC 96 P  1                16    14     -     1     -     -      30
   55988.50 to 56017.50        54    39     -    15     -     -

   NOAA 96 P  1                 2     3     -     0     -     -      30
   55988.50 to 56017.50        45    68     -     8     -     -

   SIO  96 P  1                16    16     -     5     -     -      30
   55988.50 to 56017.50        36    39     -    19     -     -

   EMR  96 P  3                31    32     -     6     -     -      30
   55988.50 to 56017.50        50    39     -    14     -     -

   IAA   1 P  1                28    39     -     7     -     -      30
   55988.50 to 56017.50        96   225     -    35     -     -

   IGR  96 P  2 *              24    18     -     4     -     -      30
   55988.50 to 56017.50        25    33     -     8     -     -

   IGS   7 P  1 *               5     5     -     0     -     -      30
   55988.50 to 56017.50        24    26     -     9     -     -


 SLR
   MCC  97 L  1               150   151     -    21     -     -      26
   55988.00 to 56018.00        84   179     -   141     -     -

   IAA   2 L  1                42    45     -     2     -     -      31
   55988.00 to 56018.00       147   177     -    16     -     -

   CGS   3 L  2                72    72     -    16     -     -      30
   55988.50 to 56017.50       150   234     -    42     -     -

   PUL  10 L  0                35    35     -     2     -     -      30
   55988.13 to 56017.39       110    87     -    15     -     -

   ILRS  5 L  1 *              51    52     -    10     -     -      30
   55988.50 to 56017.50       161   215     -    33     -     -


 BULLETIN A
   NEOS 97 C  1                33    31     6     -     -     -      31
   55988.00 to 56018.00        25    28    12     -     -     -

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