BULLETIN B 161 02 July 2001 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 2001 " " s s 0.001" 0.001" (0h UTC) Final Bulletin B values. MAY 5 52034 .17171 .45849 -.004197 -32.004197 -49.6 -6.2 MAY 10 52039 .18385 .44787 -.009352 -32.009352 -50.4 -6.2 MAY 15 52044 .19497 .43862 -.014442 -32.014442 -49.5 -6.3 MAY 20 52049 .20511 .42518 -.019273 -32.019273 -50.9 -5.9 MAY 25 52054 .21335 .41312 -.022689 -32.022689 -51.2 -6.4 MAY 30 52059 .22093 .39922 -.024581 -32.024581 -50.9 -6.2 JUN 4 52064 .22870 .38552 -.025417 -32.025417 -53.3 -5.6 Preliminary extension, to be updated weekly in Bulletin A and monthly in Bulletin B. JUN 9 52069 .23797 .37245 -.025357 -32.025357 -51.5 -6.1 JUN 14 52074 .24322 .35848 -.025563 -32.025563 -52.2 -5.3 JUN 19 52079 .24852 .34355 -.025409 -32.025409 -54.7 -5.5 JUN 24 52084 .24884 .32869 -.025518 -32.025518 -53.4 -5.4 JUN 29 52089 .25249 .31391 -.025911 -32.025911 -55.0 -4.7 JUL 4 52094 .25442 .29898 -.026386 -32.026386 -54.9 -5.5 JUL 9 52099 .25412 .28585 -.026814 -32.026814 -53.3 -5.5 JUL 14 52104 .25249 .27299 -.027226 -32.027226 -55.5 -5.0 JUL 19 52109 .24965 .26033 -.027622 -32.027622 -56.8 -5.6 JUL 24 52114 .24568 .24790 -.028034 -32.028034 -55.6 -4.9 JUL 29 52119 .24061 .23577 -.028477 -32.028477 -58.8 -5.0 AUG 3 52124 .23449 .22402 -.029018 -32.029018 -57.6 -5.5 AUG 8 52129 .22733 .21273 -.029697 -32.029697 -57.6 -4.9 AUG 13 52134 .21919 .20196 -.030544 -32.030544 -59.8 -5.1 AUG 18 52139 .21010 .19181 -.031635 -32.031635 -58.7 -5.2 AUG 23 52144 .20011 .18233 -.033009 -32.033009 -59.7 -4.4 AUG 28 52149 .18928 .17359 -.034672 -32.034672 -60.9 -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 161 (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 1999 IERS Annual Report. 2001 MJD x y UT1-UTC UT1-UT1R D dPsi dEpsilon (0 h UTC) " " s ms ms 0.001" 0.001" MAY 5 52034 .17171 .45849 -.004617 -.420 1.578 -49.6 -6.2 MAY 6 52035 .17366 .45656 -.006166 -.900 1.479 -49.8 -5.9 MAY 7 52036 .17575 .45443 -.007552 -1.261 1.299 -50.2 -5.9 MAY 8 52037 .17840 .45230 -.008750 -1.437 1.100 -50.4 -5.9 MAY 9 52038 .18119 .45011 -.009752 -1.407 .891 -50.5 -6.1 MAY 10 52039 .18385 .44787 -.010544 -1.192 .707 -50.4 -6.2 MAY 11 52040 .18652 .44578 -.011184 -.839 .596 -50.3 -6.3 MAY 12 52041 .18913 .44406 -.011758 -.411 .558 -50.0 -6.4 MAY 13 52042 .19138 .44254 -.012321 .030 .590 -49.8 -6.4 MAY 14 52043 .19324 .44074 -.012956 .424 .692 -49.6 -6.4 MAY 15 52044 .19497 .43862 -.013718 .724 .812 -49.5 -6.3 MAY 16 52045 .19688 .43633 -.014587 .902 .905 -49.5 -6.3 MAY 17 52046 .19868 .43365 -.015528 .944 1.016 -49.8 -6.1 MAY 18 52047 .20076 .43071 -.016613 .858 1.111 -50.2 -6.0 MAY 19 52048 .20318 .42789 -.017741 .666 1.133 -50.5 -5.9 MAY 20 52049 .20511 .42518 -.018862 .411 1.109 -50.9 -5.9 MAY 21 52050 .20691 .42259 -.019938 .147 1.034 -51.2 -5.9 MAY 22 52051 .20885 .42025 -.020908 -.059 .886 -51.4 -6.0 MAY 23 52052 .21041 .41804 -.021694 -.151 .672 -51.4 -6.1 MAY 24 52053 .21189 .41563 -.022249 -.100 .452 -51.3 -6.3 MAY 25 52054 .21335 .41312 -.022610 .079 .279 -51.2 -6.4 MAY 26 52055 .21462 .41037 -.022833 .327 .186 -50.9 -6.5 MAY 27 52056 .21588 .40735 -.023012 .557 .200 -50.6 -6.5 MAY 28 52057 .21732 .40448 -.023258 .685 .305 -50.5 -6.4 MAY 29 52058 .21903 .40180 -.023635 .650 .446 -50.6 -6.3 MAY 30 52059 .22093 .39922 -.024148 .433 .570 -50.9 -6.2 MAY 31 52060 .22286 .39666 -.024758 .065 .630 -51.4 -6.0 JUN 1 52061 .22442 .39405 -.025381 -.390 .637 -52.0 -5.9 JUN 2 52062 .22579 .39134 -.026001 -.842 .580 -52.7 -5.8 JUN 3 52063 .22720 .38848 -.026514 -1.205 .422 -53.1 -5.7 JUN 4 52064 .22870 .38552 -.026828 -1.411 .198 -53.3 -5.6 JUN 5 52065 .23048 .38258 -.026905 -1.426 -.038 -52.8 -5.3 JUN 6 52066 .23244 .37990 -.026758 -1.257 -.252 -52.7 -5.6 JUN 7 52067 .23444 .37728 -.026418 -.938 -.418 -52.4 -5.9 JUN 8 52068 .23642 .37476 -.025943 -.524 -.502 -51.9 -6.1 JUN 9 52069 .23797 .37245 -.025435 -.078 -.485 -51.5 -6.1 JUN 10 52070 .23913 .37008 -.024992 .341 -.385 -51.2 -6.1 JUN 11 52071 .24016 .36746 -.024680 .682 -.241 -51.1 -6.0 JUN 12 52072 .24102 .36464 -.024520 .910 -.092 -51.2 -5.8 JUN 13 52073 .24197 .36165 -.024499 1.007 .035 -51.6 -5.4 JUN 14 52074 .24322 .35848 -.024586 .977 .117 -52.2 -5.3 JUN 15 52075 .24480 .35531 -.024724 .838 .154 -52.7 -5.1 JUN 16 52076 .24623 .35231 -.024882 .621 .190 -53.4 -5.2 JUN 17 52077 .24735 .34951 -.025088 .373 .214 -54.0 -5.2 JUN 18 52078 .24818 .34652 -.025290 .148 .167 -54.4 -5.3 JUN 19 52079 .24852 .34355 -.025404 .005 .053 -54.7 -5.5 JUN 20 52080 .24836 .34068 -.025386 -.013 -.041 -54.7 -5.6 JUN 21 52081 .24825 .33775 -.025328 .103 -.097 -54.6 -5.6 JUN 22 52082 .24846 .33488 -.025213 .311 -.182 -54.2 -5.6 JUN 23 52083 .24866 .33186 -.024996 .530 -.195 -53.8 -5.5 JUN 24 52084 .24884 .32869 -.024854 .664 -.064 -53.4 -5.4 JUN 25 52085 .24943 .32568 -.024885 .635 .146 -53.3 -5.2 JUN 26 52086 .25051 .32271 -.025145 .418 .380 -53.4 -5.1 JUN 27 52087 .25133 .31967 -.025618 .039 .552 -53.6 -4.9 JUN 28 52088 .25208 .31684 -.026218 -.430 .515 -54.2 -4.8 JUN 29 52089 .25249 .31391 -.026809 -.898 .494 -55.0 -4.7 JUN 30 52090 .25306 .31080 -.027291 -1.278 .378 -55.7 -4.8 IERS, B 161 (3) 3 - NORMAL VALUES OF THE EARTH ORIENTATION PARAMETERS AT FIVE-DAY INTERVALS (IERS evaluation). Raw normal values Uncertainties 2001 MJD x y UT1-UTC dPsi dEps x y UT1 dPsi dEps (0 h UTC) " " s 0.001" 0.001" 0.0001s 0.001" MAY 5 52034 .17171 .45851 -.004625 - - .05 .05 .04 - - MAY 10 52039 .18385 .44786 -.010548 -50.43 -6.14 .04 .04 .03 .09 .05 MAY 15 52044 .19498 .43862 -.013721 -49.54 -6.31 .04 .04 .04 .10 .06 MAY 20 52049 .20510 .42518 -.018865 - - .05 .05 .04 - - MAY 25 52054 .21336 .41312 -.022614 -51.14 -6.41 .04 .03 .03 .09 .05 MAY 30 52059 .22094 .39923 -.024152 -50.89 -6.15 .04 .04 .04 .11 .06 JUN 4 52064 .22870 .38552 -.026840 - - .05 .05 .11 - - JUN 9 52069 .23797 .37246 -.025443 - - .05 .05 .05 - - JUN 14 52074 .24321 .35848 -.024591 - - .05 .05 .04 - - JUN 19 52079 .24851 .34355 -.025410 - - .05 .06 .05 - - JUN 24 52084 .24884 .32870 -.024858 - - .07 .06 .05 - - JUN 29 52089 .25248 .31391 - - - .06 .05 - - - 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 2001 MJD s (microrad/s) MAY 5 52034 .00107 72.921 15056 MAY 10 52039 .00100 15062 MAY 15 52044 .00106 15057 MAY 20 52049 .00084 15075 MAY 25 52054 .00051 15104 MAY 30 52059 .00027 15124 JUN 4 52064 .00009 15139 5 - INFORMATION ON TIME SCALES No leap second will be introduced in UTC on 31 December 2001. 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 161 (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(GSFC) 1 R 04 .09 .07 .04 - .15 .07 4 52038.25 to 52059.25 .03 .01 .03 - .12 .05 EOP(GSFC) 1 R 03 - - .11 - - - 28 52036.80 to 52085.79 - - .09 - - - EOP(IAA) 1 R 03 - - .09 - - - 27 52036.80 to 52082.79 - - .11 - - - EOP(IAA) 1 R 04 .08 .07 .03 - .15 .06 4 52038.25 to 52059.25 .05 .09 .05 - .14 .08 EOP(SPBU) 0 R 03 .09 .07 .05 - .15 .06 4 52038.25 to 52059.25 .10 .16 .07 - .14 .08 EOP(SPBU) 99 R 01 - - .09 - - - 27 52036.80 to 52082.79 - - .17 - - - EOP(BKG) 0 R 02 .08 .06 .04 - .23 .10 4 52038.00 to 52059.00 .15 .09 .08 - .19 .07 EOP(BKG) 0 R 01 - - .10 - - - 28 52036.80 to 52085.79 - - .15 - - - GPS EOP(CODE) 98 P 01 .01 .01 - .23 - - 56 52034.50 to 52089.50 .20 .07 - .31 - - EOP(EMR) 96 P 03 .05 .05 - .08 - - 50 52034.50 to 52083.50 .09 .09 - .20 - - EOP(ESOC) 96 P 01 .04 .03 - .04 - - 55 52034.50 to 52088.50 .18 .12 - .21 - - EOP(GFZ) 96 P 02 .01 .01 - .01 - - 56 52034.50 to 52089.50 .08 .10 - .23 - - EOP(JPL) 96 P 03 .04 .04 - .12 - - 56 52034.50 to 52089.50 .17 .11 - .20 - - EOP(NOAA) 96 P 01 .03 .03 - .19 - - 48 52034.50 to 52081.50 .20 .27 - .42 - - EOP(SIO) 96 P 01 .07 .08 - .19 - - 56 52034.50 to 52089.50 .08 .12 - .34 - - EOP(IGS) 95 P 02 .07 .04 .11 .06 - - 43 52034.50 to 52076.50 .08 .07 .24 .14 - - EOP(IGS) 96 P 02 .07 .07 .23 .10 - - 56 52034.50 to 52089.50 .10 .16 .89 .30 - - EOP(IERS) 97 P 01 .07 .06 .20 .12 - - 56 52034.50 to 52089.50 .03 .02 .30 .22 - - SLR EOP(CGS) 97 L 02 .13 .13 .48 - - - 50 52034.00 to 52083.00 .45 .47 5.30 - - - EOP(CSR) 95 L 01 .26 .27 6.91 - - - 13 52035.15 to 52070.94 .63 .47 3.46 - - - EOP(DUT) 98 L 01 .10 .09 - - - - 16 52035.00 to 52080.00 .37 .27 - - - - EOP(IAA) 98 L 02 .06 .05 .04 .04 - - 56 52034.00 to 52089.00 .18 .19 .50 .28 - - EOP(MCC) 97 L 01 .04 .04 - .03 - - 48 52034.00 to 52081.00 .16 .17 - .35 - - Bulletin A EOP(NEOS) 97 C 01 .07 .06 .12 - - - 55 52034.00 to 52088.00 .12 .09 .11 - - - 7 - INDIVIDUAL SERIES OF EARTH ORIENTATION PARAMETERS Operational series used for Bulletin B completion are now available on our web ftp site: http://hpiers.obspm.fr/eop-pc/products/operational.html For this reason, section 7 has been removed. We hope there is no inconvenience.