TT(BIPM94) is a realization of Terrestrial Time as defined by Recommendation IV of Resolution A4 of the International Astronomical Union, adopted at its XXIst General Assembly (1991). Thus the unit of measurement of TT(BIPM94) is chosen to agree with the SI second on the geoid and its origin is defined by the following relation to TAI : TT(BIPM94) = TAI + 32.184 s on 1977 January 1st, 0 h TAI. TT(BIPM94) has been established according to the same principles as the previous versions (Guinot, B., Atomic time scales for pulsar studies and other demanding applications, Astron. Astrophys., 192, 1988, pp. 370-373). The difference TT(BIPM94)-TT(BIPM93B) is less than 4 nanoseconds until MJD=48029 (1990 May 18). The largest discrepancy between TT(BIPM94) and TT(BIPM93B) is -26 ns for MJD=49289 (1993 October 29). 1st column : MJD at 0 h UTC 2nd " : TT(BIPM94) - EAL - 32.184 s, unit is one microsecond 3rd " : TT(BIPM94) - TAI - 32.184 s, unit is one microsecond 42589. 47.091 47.091 42599. 46.256 46.256 42609. 45.419 45.419 42619. 44.580 44.580 42629. 43.737 43.737 42639. 42.890 42.890 42649. 42.040 42.040 42659. 41.185 41.185 42669. 40.327 40.327 42679. 39.463 39.463 42689. 38.594 38.594 42699. 37.720 37.720 42709. 36.841 36.841 42719. 35.948 35.948 42729. 35.050 35.050 42739. 34.148 34.148 42749. 33.243 33.243 42759. 32.336 32.336 42769. 31.428 31.428 42779. 30.517 30.517 42789. 29.608 29.608 42799. 28.700 28.700 42809. 27.795 27.795 42819. 26.895 26.895 42829. 26.000 26.000 42839. 25.115 25.115 42849. 24.238 24.238 42859. 23.368 23.368 42869. 22.507 22.507 42879. 21.654 21.654 42889. 20.810 20.810 42899. 19.985 19.985 42909. 19.171 19.171 42919. 18.366 18.366 42929. 17.567 17.567 42939. 16.773 16.773 42949. 15.985 15.985 42959. 15.199 15.199 42969. 14.418 14.418 42979. 13.636 13.636 42989. 12.855 12.855 42999. 12.071 12.071 43009. 11.284 11.284 43019. 10.492 10.492 43029. 9.687 9.687 43039. 8.875 8.875 43049. 8.057 8.057 43059. 7.234 7.234 43069. 6.404 6.404 43079. 5.569 5.569 43089. 4.718 4.718 43099. 3.863 3.863 43109. 3.005 3.005 43119. 2.145 2.145 43129. 1.285 1.285 43139. 0.427 0.427 43149. -0.427 0.005 43159. -1.277 0.019 43169. -2.121 0.039 43179. -2.957 0.067 43189. -3.784 0.104 43199. -4.599 0.153 43209. -5.393 0.223 43219. -6.174 0.306 43229. -6.944 0.400 43239. -7.702 0.506 43249. -8.449 0.623 43259. -9.185 0.751 43269. -9.905 0.878 43279. -10.615 1.014 43289. -11.317 1.159 43299. -12.012 1.310 43309. -12.701 1.468 43319. -13.386 1.631 43329. -14.066 1.780 43339. -14.744 1.931 43349. -15.421 2.083 43359. -16.098 2.236 43369. -16.775 2.388 43379. -17.454 2.539 43389. -18.142 2.663 43399. -18.832 2.785 43409. -19.527 2.903 43419. -20.225 3.016 43429. -20.928 3.126 43439. -21.636 3.230 43449. -22.351 3.310 43459. -23.071 3.385 43469. -23.796 3.455 43479. -24.526 3.520 43489. -25.260 3.581 43499. -25.998 3.637 43509. -26.744 3.686 43519. -27.494 3.731 43529. -28.247 3.773 43539. -29.002 3.813 43549. -29.758 3.852 43559. -30.514 3.890 43569. -31.273 3.927 43579. -32.030 3.964 43589. -32.785 4.004 43599. -33.536 4.048 43609. -34.284 4.095 43619. -35.025 4.148 43629. -35.756 4.213 43639. -36.478 4.285 43649. -37.193 4.365 43659. -37.902 4.452 43669. -38.603 4.545 43679. -39.297 4.646 43689. -39.982 4.756 43699. -40.654 4.879 43709. -41.321 5.007 43719. -41.982 5.140 43729. -42.640 5.278 43739. -43.294 5.418 43749. -43.946 5.561 43759. -44.596 5.706 43769. -45.245 5.852 43779. -45.896 5.996 43789. -46.549 6.138 43799. -47.206 6.275 43809. -47.868 6.408 43819. -48.543 6.511 43829. -49.225 6.607 43839. -49.912 6.697 43849. -50.606 6.781 43859. -51.306 6.858 43869. -52.013 6.929 43879. -52.731 6.989 43889. -53.454 7.043 43899. -54.183 7.092 43909. -54.915 7.137 43919. -55.651 7.179 43929. -56.390 7.218 43939. -57.132 7.253 43949. -57.875 7.288 43959. -58.618 7.323 43969. -59.359 7.359 43979. -60.098 7.397 43989. -60.835 7.439 43999. -61.564 7.487 44009. -62.288 7.540 44019. -63.007 7.599 44029. -63.721 7.663 44039. -64.428 7.733 44049. -65.128 7.811 44059. -65.815 7.885 44069. -66.495 7.965 44079. -67.168 8.052 44089. -67.837 8.143 44099. -68.500 8.240 44109. -69.160 8.341 44119. -69.811 8.433 44129. -70.460 8.526 44139. -71.109 8.621 44149. -71.758 8.715 44159. -72.408 8.808 44169. -73.062 8.897 44179. -73.721 8.963 44189. -74.387 9.024 44199. -75.058 9.078 44209. -75.737 9.125 44219. -76.425 9.163 44229. -77.122 9.191 44239. -77.840 9.199 44249. -78.568 9.197 44259. -79.306 9.185 44269. -80.053 9.164 44279. -80.808 9.134 44289. -81.572 9.096 44299. -82.349 9.045 44309. -83.134 8.986 44319. -83.924 8.922 44329. -84.716 8.855 44339. -85.510 8.787 44349. -86.303 8.720 44359. -87.092 8.656 44369. -87.874 8.600 44379. -88.651 8.549 44389. -89.423 8.503 44399. -90.188 8.463 44409. -90.947 8.431 44419. -91.697 8.406 44429. -92.429 8.400 44439. -93.153 8.402 44449. -93.869 8.411 44459. -94.578 8.428 44469. -95.281 8.451 44479. -95.977 8.480 44489. -96.663 8.520 44499. -97.346 8.563 44509. -98.026 8.609 44519. -98.705 8.655 44529. -99.386 8.701 44539.-100.068 8.744 44549.-100.760 8.778 44559.-101.456 8.808 44569.-102.157 8.832 44579.-102.865 8.851 44589.-103.579 8.862 44599.-104.301 8.866 44609.-105.040 8.852 44619.-105.787 8.831 44629.-106.540 8.804 44639.-107.299 8.771 44649.-108.063 8.733 44659.-108.830 8.691 44669.-109.605 8.642 44679.-110.381 8.591 44689.-111.158 8.541 44699.-111.933 8.492 44709.-112.704 8.446 44719.-113.471 8.405 44729.-114.226 8.376 44739.-114.974 8.353 44749.-115.715 8.338 44759.-116.448 8.331 44769.-117.173 8.331 44779.-117.890 8.341 44789.-118.587 8.369 44799.-119.276 8.406 44809.-119.958 8.449 44819.-120.635 8.499 44829.-121.307 8.553 44839.-121.975 8.610 44849.-122.640 8.671 44859.-123.303 8.733 44869.-123.967 8.795 44879.-124.633 8.855 44889.-125.302 8.912 44899.-125.975 8.965 44909.-126.660 9.005 44919.-127.353 9.038 44929.-128.053 9.064 44939.-128.759 9.084 44949.-129.470 9.098 44959.-130.188 9.106 44969.-130.916 9.104 44979.-131.654 9.092 44989.-132.395 9.076 44999.-133.140 9.057 45009.-133.886 9.036 45019.-134.633 9.015 45029.-135.379 8.995 45039.-136.123 8.977 45049.-136.864 8.962 45059.-137.601 8.951 45069.-138.333 8.945 45079.-139.059 8.945 45089.-139.775 8.954 45099.-140.476 8.961 45109.-141.170 8.976 45119.-141.856 8.998 45129.-142.537 9.026 45139.-143.210 9.061 45149.-143.878 9.101 45159.-144.537 9.134 45169.-145.192 9.171 45179.-145.843 9.211 45189.-146.492 9.253 45199.-147.140 9.296 45209.-147.788 9.339 45219.-148.439 9.362 45229.-149.091 9.384 45239.-149.747 9.402 45249.-150.405 9.417 45259.-151.068 9.428 45269.-151.737 9.434 45279.-152.417 9.427 45289.-153.103 9.415 45299.-153.795 9.397 45309.-154.492 9.375 45319.-155.193 9.347 45329.-155.899 9.315 45339.-156.612 9.276 45349.-157.329 9.233 45359.-158.048 9.187 45369.-158.770 9.140 45379.-159.493 9.091 45389.-160.216 9.042 45399.-160.939 8.993 45409.-161.661 8.945 45419.-162.381 8.898 45429.-163.099 8.854 45439.-163.814 8.813 45449.-164.525 8.776 45459.-165.228 8.747 45469.-165.926 8.723 45479.-166.619 8.704 45489.-167.307 8.690 45499.-167.990 8.681 45509.-168.667 8.677 45519.-169.334 8.684 45529.-169.997 8.696 45539.-170.655 8.711 45549.-171.311 8.729 45559.-171.964 8.750 45569.-172.616 8.772 45579.-173.266 8.796 45589.-173.916 8.820 45599.-174.567 8.843 45609.-175.219 8.864 45619.-175.875 8.883 45629.-176.534 8.897 45639.-177.201 8.904 45649.-177.875 8.905 45659.-178.553 8.900 45669.-179.237 8.890 45679.-179.927 8.874 45689.-180.623 8.852 45699.-181.328 8.822 45709.-182.044 8.779 45719.-182.765 8.732 45729.-183.491 8.680 45739.-184.221 8.624 45749.-184.953 8.565 45759.-185.688 8.505 45769.-186.424 8.460 45779.-187.160 8.415 45789.-187.895 8.371 45799.-188.630 8.328 45809.-189.362 8.287 45819.-190.091 8.249 45829.-190.811 8.220 45839.-191.527 8.195 45849.-192.239 8.174 45859.-192.948 8.156 45869.-193.654 8.142 45879.-194.355 8.132 45889.-195.050 8.128 45899.-195.742 8.127 45909.-196.433 8.128 45919.-197.122 8.130 45929.-197.810 8.133 45939.-198.499 8.135 45949.-199.191 8.135 45959.-199.884 8.133 45969.-200.578 8.130 45979.-201.275 8.124 45989.-201.975 8.115 45999.-202.678 8.103 46009.-203.389 8.084 46019.-204.103 8.061 46029.-204.820 8.035 46039.-205.540 8.006 46049.-206.262 7.976 46059.-206.986 7.943 46069.-207.712 7.908 46079.-208.440 7.871 46089.-209.168 7.834 46099.-209.896 7.797 46109.-210.624 7.761 46119.-211.351 7.725 46129.-212.074 7.693 46139.-212.795 7.663 46149.-213.514 7.635 46159.-214.232 7.608 46169.-214.949 7.583 46179.-215.664 7.559 46189.-216.375 7.539 46199.-217.086 7.520 46209.-217.795 7.502 46219.-218.503 7.485 46229.-219.210 7.469 46239.-219.916 7.454 46249.-220.622 7.439 46259.-221.328 7.424 46269.-222.034 7.410 46279.-222.740 7.395 46289.-223.447 7.379 46299.-224.154 7.364 46309.-224.862 7.347 46319.-225.571 7.329 46329.-226.281 7.310 46339.-226.993 7.290 46349.-227.706 7.268 46359.-228.420 7.245 46369.-229.137 7.219 46379.-229.857 7.190 46389.-230.578 7.160 46399.-231.302 7.128 46409.-232.027 7.094 46419.-232.753 7.059 46429.-233.482 7.021 46439.-234.213 6.981 46449.-234.946 6.940 46459.-235.679 6.898 46469.-236.413 6.855 46479.-237.147 6.812 46489.-237.881 6.770 46499.-238.614 6.727 46509.-239.347 6.686 46519.-240.078 6.645 46529.-240.808 6.607 46539.-241.535 6.571 46549.-242.260 6.538 46559.-242.979 6.509 46569.-243.696 6.484 46579.-244.409 6.462 46589.-245.118 6.444 46599.-245.825 6.429 46609.-246.527 6.417 46619.-247.223 6.413 46629.-247.916 6.411 46639.-248.605 6.413 46649.-249.293 6.416 46659.-249.979 6.421 46669.-250.664 6.428 46679.-251.349 6.434 46689.-252.033 6.441 46699.-252.718 6.447 46709.-253.403 6.453 46719.-254.090 6.458 46729.-254.777 6.462 46739.-255.470 6.460 46749.-256.165 6.457 46759.-256.861 6.451 46769.-257.560 6.444 46779.-258.260 6.435 46789.-258.961 6.425 46799.-259.666 6.411 46809.-260.373 6.396 46819.-261.080 6.380 46829.-261.788 6.363 46839.-262.496 6.347 46849.-263.203 6.330 46859.-263.910 6.315 46869.-264.616 6.300 46879.-265.320 6.287 46889.-266.024 6.275 46899.-266.725 6.265 46909.-267.424 6.257 46919.-268.118 6.255 46929.-268.809 6.256 46939.-269.498 6.259 46949.-270.186 6.264 46959.-270.871 6.271 46969.-271.554 6.280 46979.-272.235 6.291 46989.-272.915 6.304 46999.-273.594 6.318 47009.-274.271 6.332 47019.-274.948 6.348 47029.-275.624 6.364 47039.-276.299 6.381 47049.-276.975 6.398 47059.-277.651 6.414 47069.-278.326 6.431 47079.-279.003 6.447 47089.-279.680 6.462 47099.-280.358 6.476 47109.-281.038 6.488 47119.-281.719 6.499 47129.-282.401 6.510 47139.-283.084 6.519 47149.-283.768 6.527 47159.-284.453 6.534 47169.-285.140 6.538 47179.-285.828 6.542 47189.-286.517 6.545 47199.-287.205 6.547 47209.-287.894 6.549 47219.-288.583 6.551 47229.-289.273 6.553 47239.-289.962 6.555 47249.-290.650 6.558 47259.-291.338 6.562 47269.-292.025 6.566 47279.-292.710 6.572 47289.-293.393 6.580 47299.-294.074 6.590 47309.-294.754 6.602 47319.-295.432 6.615 47329.-296.108 6.630 47339.-296.782 6.647 47349.-297.452 6.668 47359.-298.120 6.691 47369.-298.787 6.716 47379.-299.453 6.741 47389.-300.118 6.767 47399.-300.782 6.794 47409.-301.446 6.822 47419.-302.110 6.849 47429.-302.774 6.876 47439.-303.439 6.902 47449.-304.105 6.927 47459.-304.773 6.950 47469.-305.445 6.970 47479.-306.118 6.988 47489.-306.793 7.004 47499.-307.470 7.019 47509.-308.148 7.031 47519.-308.829 7.042 47529.-309.513 7.049 47539.-310.199 7.054 47549.-310.886 7.058 47559.-311.573 7.062 47569.-312.260 7.066 47579.-312.947 7.071 47589.-313.632 7.077 47599.-314.316 7.084 47609.-314.999 7.093 47619.-315.680 7.103 47629.-316.359 7.115 47639.-317.035 7.130 47649.-317.706 7.150 47659.-318.375 7.173 47669.-319.041 7.198 47679.-319.705 7.226 47689.-320.366 7.255 47699.-321.026 7.286 47709.-321.683 7.316 47719.-322.339 7.348 47729.-322.993 7.380 47739.-323.646 7.414 47749.-324.300 7.447 47759.-324.953 7.481 47769.-325.607 7.513 47779.-326.264 7.544 47789.-326.921 7.573 47799.-327.579 7.602 47809.-328.238 7.630 47819.-328.898 7.657 47829.-329.559 7.683 47839.-330.222 7.707 47849.-330.886 7.730 47859.-331.550 7.753 47869.-332.215 7.775 47879.-332.880 7.797 47889.-333.545 7.818 47899.-334.209 7.836 47909.-334.874 7.854 47919.-335.538 7.872 47929.-336.202 7.891 47939.-336.866 7.910 47949.-337.529 7.929 47959.-338.191 7.946 47969.-338.852 7.963 47979.-339.513 7.980 47989.-340.174 7.998 47999.-340.833 8.016 48009.-341.493 8.035 48019.-342.152 8.050 48029.-342.811 8.065 48039.-343.469 8.081 48049.-344.127 8.097 48059.-344.785 8.113 48069.-345.443 8.129 48079.-346.101 8.140 48089.-346.760 8.151 48099.-347.417 8.163 48109.-348.075 8.175 48119.-348.732 8.187 48129.-349.388 8.201 48139.-350.044 8.211 48149.-350.698 8.221 48159.-351.352 8.233 48169.-352.005 8.245 48179.-352.657 8.258 48189.-353.309 8.272 48199.-353.959 8.287 48209.-354.608 8.303 48219.-355.257 8.320 48229.-355.904 8.338 48239.-356.550 8.357 48249.-357.196 8.377 48259.-357.839 8.399 48269.-358.482 8.421 48279.-359.123 8.445 48289.-359.764 8.469 48299.-360.404 8.494 48309.-361.044 8.520 48319.-361.684 8.539 48329.-362.323 8.559 48339.-362.962 8.578 48349.-363.601 8.598 48359.-364.240 8.618 48369.-364.879 8.637 48379.-365.520 8.649 48389.-366.161 8.661 48399.-366.801 8.673 48409.-367.442 8.684 48419.-368.082 8.696 48429.-368.722 8.709 48439.-369.361 8.722 48449.-370.000 8.735 48459.-370.638 8.750 48469.-371.276 8.764 48479.-371.913 8.779 48489.-372.550 8.794 48499.-373.187 8.810 48509.-373.822 8.823 48519.-374.457 8.836 48529.-375.092 8.849 48539.-375.727 8.862 48549.-376.362 8.875 48559.-376.998 8.888 48569.-377.634 8.895 48579.-378.271 8.902 48589.-378.908 8.908 48599.-379.547 8.913 48609.-380.186 8.918 48619.-380.826 8.922 48629.-381.468 8.923 48639.-382.112 8.923 48649.-382.755 8.923 48659.-383.400 8.922 48669.-384.044 8.922 48679.-384.688 8.921 48689.-385.332 8.921 48699.-385.975 8.922 48709.-386.617 8.923 48719.-387.259 8.925 48729.-387.899 8.928 48739.-388.538 8.933 48749.-389.173 8.937 48759.-389.807 8.943 48769.-390.440 8.950 48779.-391.071 8.958 48789.-391.701 8.967 48799.-392.330 8.977 48809.-392.958 8.984 48819.-393.585 8.992 48829.-394.212 9.000 48839.-394.839 9.009 48849.-395.466 9.017 48859.-396.093 9.025 48869.-396.721 9.032 48879.-397.350 9.038 48889.-397.980 9.043 48899.-398.610 9.048 48909.-399.241 9.052 48919.-399.873 9.055 48929.-400.506 9.057 48939.-401.141 9.057 48949.-401.776 9.057 48959.-402.411 9.057 48969.-403.047 9.056 48979.-403.684 9.055 48989.-404.320 9.053 48999.-404.957 9.051 49009.-405.594 9.049 49019.-406.231 9.047 49029.-406.869 9.045 49039.-407.507 9.042 49049.-408.144 9.039 49059.-408.782 9.036 49069.-409.421 9.033 49079.-410.059 9.030 49089.-410.697 9.027 49099.-411.335 9.024 49109.-411.973 9.025 49119.-412.611 9.026 49129.-413.249 9.028 49139.-413.887 9.029 49149.-414.525 9.031 49159.-415.162 9.033 49169.-415.799 9.035 49179.-416.435 9.038 49189.-417.071 9.042 49199.-417.707 9.046 49209.-418.342 9.050 49219.-418.977 9.054 49229.-419.611 9.059 49239.-420.245 9.064 49249.-420.880 9.069 49259.-421.514 9.074 49269.-422.149 9.079 49279.-422.784 9.083 49289.-423.420 9.087 49299.-424.057 9.089 49309.-424.695 9.090 49319.-425.334 9.091 49329.-425.973 9.091 49339.-426.614 9.090 49349.-427.255 9.088 49359.-427.896 9.086 49369.-428.539 9.082 49379.-429.182 9.078 49389.-429.827 9.074 49399.-430.472 9.068 49409.-431.117 9.061 49419.-431.764 9.054 49429.-432.411 9.046 49439.-433.059 9.037 49449.-433.708 9.028 49459.-434.358 9.018 49469.-435.009 9.006