Relations of UTC and TAI with GPS time and GLONASS time [UTC-GPS time] = -14 s + C0, [TAI-GPS time] = 19 s + C0, until 2009 January 1, 0h UTC. [UTC-GPS time] = -15 s + C0, [TAI-GPS time] = 19 s + C0, from 2009 January 1, 0h UTC. Global uncertainty of [UTC-GPS time] is of order 10 ns. [UTC-GLONASS time] = 0 s + C1, [TAI-GLONASS time] = 33 s + C1, until 2009 January 1, 0h UTC. [UTC-GLONASS time] = 0 s + C1, [TAI-GLONASS time] = 34 s + C1, from 2009 January 1, 0h UTC. Global uncertainty of [UTC-GLONASS time] is of order hundreds ns. The C0 values provide a realization of GPS time, as obtained using the values [UTC-UTC(OP)] and the GPS data taken at the Paris Observatory, corrected for IGS precise orbits, clocks and ionosphere maps. The C1 values provide a realization of GLONASS time, as obtained using the values [UTC-UTC(AOS)] and the GLONASS data taken at the Astrogeodynamical Observatory Borowiec (AOS). N0 and N1 are the numbers of measurements, when N0 or N1 is 0, the corresponding values of C0 or C1 are interpolated. The standard deviations S0 and S1 characterize the dispersion of individual measurements. The actual uncertainty of user's access to GPS and GLONASS times may differ from these values. For this circular, S0 = 2.8 ns, S1 = 10.6 ns Date 2008/09 0h UTC MJD C0/ns N0 C1/ns N1 DEC 29 54829 -16.1 47 -80.9 58 DEC 30 54830 -16.9 46 -77.8 61 DEC 31 54831 -14.3 6 -74.5 73 JAN 1 54832 -14.6 10 -71.4 50 JAN 2 54833 -12.1 47 -70.8 80 JAN 3 54834 -10.4 48 -72.7 76 JAN 4 54835 -11.7 48 -71.2 78 JAN 5 54836 -6.4 44 -67.5 68 JAN 6 54837 -3.4 48 -67.0 75 JAN 7 54838 -5.5 48 -59.6 69 JAN 8 54839 -7.2 48 -50.3 77 JAN 9 54840 -6.6 43 -48.5 76 JAN 10 54841 -9.4 48 -49.2 77 JAN 11 54842 -10.7 48 -38.9 77 JAN 12 54843 -10.3 48 -28.0 70 JAN 13 54844 -10.1 46 -21.1 78 JAN 14 54845 -12.6 48 -15.8 78 JAN 15 54846 -12.1 47 -16.6 78 JAN 16 54847 -8.7 47 -19.1 79 JAN 17 54848 -6.7 46 -21.5 81 JAN 18 54849 -8.1 48 -22.0 76 JAN 19 54850 -10.2 46 -19.8 74 JAN 20 54851 -7.5 44 -11.4 80 JAN 21 54852 -6.1 44 -6.7 84 JAN 22 54853 -5.0 49 -10.8 84 JAN 23 54854 -7.5 46 -13.9 82 JAN 24 54855 -11.3 44 -14.8 85 JAN 25 54856 -11.9 46 -14.4 83 JAN 26 54857 -8.5 42 -11.0 73 JAN 27 54858 -4.1 46 -6.5 80 JAN 28 54859 -5.0 44 -3.4 81 For this circular, S0 = 2.7 ns, S1 = 11.1 ns Date 2009 0h UTC MJD C0/ns N0 C1/ns N1 JAN 28 54859 -4.7 46 -3.7 81 JAN 29 54860 -3.1 44 1.1 85 JAN 30 54861 -5.1 49 4.2 76 JAN 31 54862 -6.8 47 10.0 81 FEB 1 54863 -8.8 48 13.2 80 FEB 2 54864 -6.1 43 16.4 79 FEB 3 54865 -4.5 49 25.8 75 FEB 4 54866 -4.9 46 30.9 83 FEB 5 54867 -4.6 47 31.3 84 FEB 6 54868 -5.4 43 32.7 85 FEB 7 54869 -8.2 49 35.2 85 FEB 8 54870 -10.1 48 31.0 82 FEB 9 54871 -4.8 48 27.6 85 FEB 10 54872 -2.8 45 24.9 83 FEB 11 54873 -3.5 48 26.4 81 FEB 12 54874 -2.7 46 29.7 80 FEB 13 54875 -5.8 48 29.3 86 FEB 14 54876 -10.0 44 29.7 88 FEB 15 54877 -9.3 48 30.7 83 FEB 16 54878 -7.6 48 31.8 76 FEB 17 54879 -7.0 48 31.1 84 FEB 18 54880 -8.2 45 29.2 75 FEB 19 54881 -5.3 48 28.1 73 FEB 20 54882 -6.5 48 30.0 73 FEB 21 54883 -5.2 47 33.0 83 FEB 22 54884 -4.0 46 38.5 83 FEB 23 54885 -3.6 45 38.7 78 FEB 24 54886 -0.4 47 34.5 70 FEB 25 54887 0.1 47 31.7 71 FEB 26 54888 -0.4 45 32.2 82 FEB 27 54889 -1.8 47 34.9 80 For this circular, S0 = 2.8 ns, S1 = 14.2 ns Date 2009 0h UTC MJD C0/ns N0 C1/ns N1 FEB 27 54889 -1.6 44 34.8 82 FEB 28 54890 -5.2 46 34.0 76 MAR 1 54891 -5.2 47 32.1 80 MAR 2 54892 -3.5 46 35.0 85 MAR 3 54893 0.8 47 37.2 75 MAR 4 54894 3.8 47 32.6 74 MAR 5 54895 4.7 47 28.6 64 MAR 6 54896 6.2 40 31.4 77 MAR 7 54897 5.1 43 36.5 79 MAR 8 54898 0.1 45 42.7 77 MAR 9 54899 -0.4 47 42.4 81 MAR 10 54900 0.4 44 37.3 85 MAR 11 54901 -0.5 44 39.5 80 MAR 12 54902 -0.7 46 42.1 68 MAR 13 54903 -2.4 46 33.4 70 MAR 14 54904 0.0 42 27.4 77 MAR 15 54905 -0.5 46 33.3 78 MAR 16 54906 0.4 46 42.2 69 MAR 17 54907 -0.2 46 47.8 65 MAR 18 54908 -1.3 45 44.9 62 MAR 19 54909 -2.1 48 47.8 65 MAR 20 54910 -3.4 41 50.7 66 MAR 21 54911 -4.0 45 43.9 71 MAR 22 54912 0.4 44 39.4 69 MAR 23 54913 1.6 46 42.9 70 MAR 24 54914 1.5 47 44.6 67 MAR 25 54915 -0.4 46 39.4 71 MAR 26 54916 1.0 46 42.3 69 MAR 27 54917 1.5 48 51.3 71 MAR 28 54918 -1.1 47 53.4 74 MAR 29 54919 1.3 46 56.4 79 For this circular, S0 = 2.8 ns, S1 = 13.6 ns Date 2009 0h UTC MJD C0/ns N0 C1/ns N1 MAR 29 54919 1.5 46 55.5 79 MAR 30 54920 0.6 43 57.8 79 MAR 31 54921 2.6 47 61.7 75 APR 1 54922 5.8 46 66.9 83 APR 2 54923 5.0 46 72.4 82 APR 3 54924 4.3 42 78.7 80 APR 4 54925 3.5 45 76.4 74 APR 5 54926 6.8 47 74.7 75 APR 6 54927 8.0 47 78.0 83 APR 7 54928 4.9 47 80.5 70 APR 8 54929 0.3 47 79.3 70 APR 9 54930 0.1 46 78.3 65 APR 10 54931 -0.5 46 78.8 82 APR 11 54932 -1.1 46 77.8 75 APR 12 54933 1.0 47 75.5 71 APR 13 54934 0.9 44 78.5 77 APR 14 54935 2.8 43 79.2 78 APR 15 54936 2.1 46 68.7 54 APR 16 54937 2.2 48 61.4 63 APR 17 54938 3.6 47 66.1 64 APR 18 54939 1.3 47 69.8 81 APR 19 54940 1.1 43 64.8 77 APR 20 54941 0.2 47 56.8 69 APR 21 54942 1.2 43 50.4 71 APR 22 54943 3.7 41 50.8 81 APR 23 54944 3.8 45 59.5 82 APR 24 54945 4.8 47 60.8 48 APR 25 54946 6.0 45 51.7 79 APR 26 54947 5.8 45 46.0 76 APR 27 54948 4.4 44 46.4 69 APR 28 54949 2.9 47 51.5 80 For this circular, S0 = 2.6 ns, S1 = 15.6 ns Date 2009 0h UTC MJD C0/ns N0 C1/ns N1 APR 28 54949 3.0 47 52.3 83 APR 29 54950 5.3 45 53.4 85 APR 30 54951 1.5 44 54.8 83 MAY 1 54952 -2.2 48 51.8 75 MAY 2 54953 -0.6 49 49.9 80 MAY 3 54954 2.9 46 50.8 75 MAY 4 54955 4.1 47 47.2 84 MAY 5 54956 1.9 48 50.5 82 MAY 6 54957 -0.5 48 55.1 73 MAY 7 54958 0.3 47 58.3 79 MAY 8 54959 4.7 46 59.0 72 MAY 9 54960 6.3 48 53.7 71 MAY 10 54961 3.8 48 42.5 64 MAY 11 54962 4.7 46 41.9 68 MAY 12 54963 6.9 46 46.0 79 MAY 13 54964 5.2 48 38.8 86 MAY 14 54965 5.2 49 37.5 82 MAY 15 54966 4.2 46 43.6 82 MAY 16 54967 3.5 45 48.6 75 MAY 17 54968 5.1 48 47.8 78 MAY 18 54969 5.6 49 46.6 75 MAY 19 54970 3.1 46 42.2 83 MAY 20 54971 -0.7 43 36.1 82 MAY 21 54972 -2.9 48 25.3 76 MAY 22 54973 -1.2 46 23.2 65 MAY 23 54974 0.3 45 30.9 63 MAY 24 54975 1.7 46 35.1 68 MAY 25 54976 3.0 46 37.9 64 MAY 26 54977 5.0 49 41.1 67 MAY 27 54978 4.7 46 43.7 57 MAY 28 54979 2.6 44 40.8 57 For this circular, S0 = 2.6 ns, S1 = 14.8 ns Date 2009 0h UTC MJD C0/ns N0 C1/ns N1 MAY 28 54979 2.7 44 40.3 57 MAY 29 54980 -2.2 47 42.9 67 MAY 30 54981 -2.8 49 45.8 63 MAY 31 54982 -1.3 47 46.3 80 JUN 1 54983 -0.2 48 37.7 64 JUN 2 54984 0.7 47 25.0 72 JUN 3 54985 0.5 48 26.0 65 JUN 4 54986 -0.9 45 41.1 70 JUN 5 54987 -3.3 47 46.0 71 JUN 6 54988 -3.1 47 45.9 68 JUN 7 54989 -1.6 48 50.9 65 JUN 8 54990 -1.6 48 51.7 76 JUN 9 54991 -2.6 46 49.9 78 JUN 10 54992 0.6 47 47.2 84 JUN 11 54993 2.2 49 47.8 70 JUN 12 54994 3.9 46 58.4 86 JUN 13 54995 4.5 46 64.9 86 JUN 14 54996 0.8 48 60.8 86 JUN 15 54997 -2.5 49 60.1 85 JUN 16 54998 -2.6 48 61.4 79 JUN 17 54999 -2.5 47 61.8 79 JUN 18 55000 0.0 46 63.8 75 JUN 19 55001 1.3 47 66.0 77 JUN 20 55002 -2.8 45 70.0 85 JUN 21 55003 -0.9 46 74.9 84 JUN 22 55004 0.2 45 71.6 84 JUN 23 55005 0.5 47 73.7 81 JUN 24 55006 0.9 47 73.2 79 JUN 25 55007 -2.9 47 66.9 75 JUN 26 55008 -2.1 47 67.8 76 JUN 27 55009 -5.6 48 71.8 82 For this circular, S0 = 2.8 ns, S1 = 12.0 ns Date 2009 0h UTC MJD C0/ns N0 C1/ns N1 JUN 27 55009 -5.8 48 69.9 76 JUN 28 55010 -3.0 45 70.8 76 JUN 29 55011 -3.6 46 73.1 77 JUN 30 55012 -3.0 46 74.5 77 JUL 1 55013 -0.5 48 75.4 86 JUL 2 55014 -4.4 46 73.1 72 JUL 3 55015 -5.1 46 70.5 65 JUL 4 55016 -6.0 44 74.0 75 JUL 5 55017 -8.5 47 74.7 76 JUL 6 55018 -9.3 45 69.7 69 JUL 7 55019 -9.2 46 69.0 72 JUL 8 55020 -8.9 45 69.8 81 JUL 9 55021 -9.4 46 66.8 75 JUL 10 55022 -6.7 44 65.5 80 JUL 11 55023 -5.0 43 66.0 68 JUL 12 55024 -6.0 45 64.3 74 JUL 13 55025 -8.7 42 66.6 65 JUL 14 55026 -11.5 43 76.1 81 JUL 15 55027 -10.2 45 76.9 77 JUL 16 55028 -8.4 45 74.9 83 JUL 17 55029 -7.9 44 75.8 82 JUL 18 55030 -6.5 44 71.6 42 JUL 19 55031 -5.5 45 - 0 JUL 20 55032 -3.3 45 - 0 JUL 21 55033 -4.5 43 78.8 78 JUL 22 55034 -6.0 43 76.9 82 JUL 23 55035 -2.9 43 73.6 76 JUL 24 55036 -2.2 45 69.7 80 JUL 25 55037 -3.3 42 67.5 83 JUL 26 55038 -5.3 42 63.9 66 JUL 27 55039 -6.0 42 61.4 73 For this circular, S0 = 2.5 ns, S1 = 13.2 ns Date 2009 0h UTC MJD C0/ns N0 C1/ns N1 JUL 27 55039 -6.1 43 61.7 77 JUL 28 55040 -5.5 43 66.2 74 JUL 29 55041 -7.2 45 67.4 80 JUL 30 55042 -8.2 44 64.1 85 JUL 31 55043 -7.6 44 59.7 85 AUG 1 55044 -5.6 41 59.1 82 AUG 2 55045 -1.9 42 57.4 87 AUG 3 55046 -0.1 43 57.7 85 AUG 4 55047 0.8 44 57.3 70 AUG 5 55048 -1.3 44 53.5 74 AUG 6 55049 -3.1 44 52.5 77 AUG 7 55050 -1.5 44 51.2 82 AUG 8 55051 -2.1 43 51.0 87 AUG 9 55052 -0.7 43 46.4 83 AUG 10 55053 -2.5 45 48.9 83 AUG 11 55054 -1.6 45 52.0 81 AUG 12 55055 -1.5 45 49.2 77 AUG 13 55056 -2.2 42 50.9 75 AUG 14 55057 -0.8 45 57.2 82 AUG 15 55058 0.7 45 62.0 86 AUG 16 55059 0.0 45 62.7 83 AUG 17 55060 2.1 43 60.9 62 AUG 18 55061 1.6 45 59.5 80 AUG 19 55062 2.2 45 60.4 78 AUG 20 55063 1.0 44 65.8 78 AUG 21 55064 0.5 43 69.5 69 AUG 22 55065 -2.3 43 72.3 75 AUG 23 55066 -3.4 44 73.0 77 AUG 24 55067 -5.3 45 72.0 57 AUG 25 55068 -3.7 42 75.8 69 AUG 26 55069 -3.1 45 82.2 80 AUG 27 55070 1.5 44 84.3 66 AUG 28 55071 2.4 44 81.4 51 AUG 29 55072 1.6 43 82.5 73 AUG 30 55073 0.9 45 85.8 68 AUG 31 55074 -1.2 45 85.3 76 For this circular, S0 = 2.6 ns, S1 = 14.3 ns Date 2009 0h UTC MJD C0/ns N0 C1/ns N1 AUG 31 55074 -1.3 45 85.3 75 SEP 1 55075 -4.8 43 82.8 77 SEP 2 55076 -2.2 43 84.0 80 SEP 3 55077 -2.1 44 83.9 82 SEP 4 55078 -4.9 45 81.1 75 SEP 5 55079 -4.4 41 80.0 76 SEP 6 55080 -3.8 44 80.0 71 SEP 7 55081 -2.6 42 78.8 69 SEP 8 55082 -2.6 42 79.6 64 SEP 9 55083 -3.5 45 75.7 73 SEP 10 55084 -5.0 42 73.3 81 SEP 11 55085 -6.1 44 78.0 85 SEP 12 55086 -4.6 43 75.1 78 SEP 13 55087 -4.8 44 63.9 69 SEP 14 55088 -4.3 44 58.7 70 SEP 15 55089 -0.3 43 66.8 65 SEP 16 55090 -1.5 43 66.9 63 SEP 17 55091 -2.4 43 57.2 71 SEP 18 55092 -0.4 42 51.2 66 SEP 19 55093 -2.3 37 49.3 66 SEP 20 55094 -3.6 41 51.4 74 SEP 21 55095 -4.0 43 52.4 77 SEP 22 55096 -2.3 40 52.8 72 SEP 23 55097 -1.5 45 55.3 80 SEP 24 55098 -0.7 44 55.2 82 SEP 25 55099 -3.3 38 53.7 78 SEP 26 55100 -3.0 39 52.8 74 SEP 27 55101 -2.8 40 53.5 63 SEP 28 55102 -6.8 40 53.1 70 SEP 29 55103 -5.1 36 53.6 79 SEP 30 55104 -4.5 40 55.4 75 For this circular, S0 = 2.8 ns, S1 = 13.4 ns Date 2009 0h UTC MJD C0/ns N0 C1/ns N1 SEP 30 55104 -4.4 21 55.4 75 OCT 1 55105 -4.8 39 56.7 80 OCT 2 55106 -0.6 43 58.0 84 OCT 3 55107 3.4 43 55.5 88 OCT 4 55108 3.4 40 54.2 77 OCT 5 55109 2.4 44 55.7 74 OCT 6 55110 3.3 44 58.9 78 OCT 7 55111 4.0 43 61.9 77 OCT 8 55112 2.8 44 73.5 69 OCT 9 55113 3.6 39 99.7 75 OCT 10 55114 3.6 42 110.6 81 OCT 11 55115 7.1 40 106.9 82 OCT 12 55116 6.0 43 104.2 81 OCT 13 55117 4.5 44 106.4 80 OCT 14 55118 0.6 44 111.3 81 OCT 15 55119 -1.0 39 111.3 79 OCT 16 55120 -5.6 40 114.5 77 OCT 17 55121 -5.4 35 116.9 82 OCT 18 55122 -2.7 41 114.2 85 OCT 19 55123 0.7 38 115.1 81 OCT 20 55124 2.5 43 113.4 76 OCT 21 55125 1.6 42 113.6 78 OCT 22 55126 0.3 42 114.6 78 OCT 23 55127 3.0 43 111.1 78 OCT 24 55128 4.3 44 106.4 76 OCT 25 55129 2.8 42 108.1 82 OCT 26 55130 1.9 43 108.1 82 OCT 27 55131 1.2 42 116.9 76 OCT 28 55132 0.6 44 69.3 49 OCT 29 55133 0.2 37 - - OCT 30 55134 -1.6 43 -216.3 74 For this circular, S0 = 2.8 ns, S1 = 11.4 ns Date 2009 0h UTC MJD C0/ns N0 C1/ns N1 OCT 30 55134 -1.7 43 -219.5 73 OCT 31 55135 -1.6 41 -222.5 74 NOV 1 55136 -1.0 43 -219.7 71 NOV 2 55137 0.3 41 -213.4 74 NOV 3 55138 0.0 45 -212.7 77 NOV 4 55139 -0.2 46 -220.3 82 NOV 5 55140 1.6 48 -222.1 75 NOV 6 55141 2.6 46 -223.1 78 NOV 7 55142 2.3 46 -225.9 81 NOV 8 55143 1.2 45 -227.6 74 NOV 9 55144 -0.9 48 -224.7 72 NOV 10 55145 -3.6 46 -221.5 76 NOV 11 55146 -3.6 46 -224.8 74 NOV 12 55147 -4.3 47 -227.5 85 NOV 13 55148 -3.0 47 -228.9 67 NOV 14 55149 1.6 45 -229.8 70 NOV 15 55150 3.9 47 -233.2 80 NOV 16 55151 4.1 48 -233.3 70 NOV 17 55152 0.5 47 -229.9 72 NOV 18 55153 -0.9 46 -231.7 73 NOV 19 55154 -0.9 45 -233.8 82 NOV 20 55155 3.0 48 -235.1 77 NOV 21 55156 2.5 47 -231.9 78 NOV 22 55157 3.1 44 -232.4 80 NOV 23 55158 3.7 46 -234.5 74 NOV 24 55159 1.8 46 -235.9 73 NOV 25 55160 -2.4 47 -234.9 61 NOV 26 55161 -2.8 49 -236.7 58 NOV 27 55162 2.4 48 -237.9 57 NOV 28 55163 2.0 45 -235.2 76 NOV 29 55164 3.2 48 -229.2 72 For this circular, S0 = 2.9 ns, S1 = 11.8 ns Date 2009 0h UTC MJD C0/ns N0 C1/ns N1 NOV 29 55164 3.4 48 -229.5 72 NOV 30 55165 0.4 44 -230.8 74 DEC 1 55166 0.4 45 -235.4 67 DEC 2 55167 0.8 39 -236.7 65 DEC 3 55168 1.3 44 -235.0 71 DEC 4 55169 -0.2 48 -232.5 75 DEC 5 55170 1.2 47 -229.7 80 DEC 6 55171 -0.1 47 -226.4 68 DEC 7 55172 -1.9 45 -231.2 66 DEC 8 55173 -0.3 44 -237.0 74 DEC 9 55174 2.4 45 -239.5 73 DEC 10 55175 3.1 43 -239.5 67 DEC 11 55176 2.9 47 -235.5 62 DEC 12 55177 2.5 44 -236.7 72 DEC 13 55178 6.8 48 -236.3 82 DEC 14 55179 4.4 45 -234.9 67 DEC 15 55180 3.6 47 -236.3 65 DEC 16 55181 2.5 46 -237.0 69 DEC 17 55182 3.7 45 -239.8 69 DEC 18 55183 4.3 46 -240.1 68 DEC 19 55184 3.0 46 -233.7 64 DEC 20 55185 1.3 48 -233.6 71 DEC 21 55186 -3.2 47 -238.1 72 DEC 22 55187 -4.4 48 -235.8 67 DEC 23 55188 -1.7 48 -233.7 63 DEC 24 55189 1.5 46 -232.6 68 DEC 25 55190 5.8 47 -227.8 66 DEC 26 55191 11.8 47 -225.5 60 DEC 27 55192 12.5 48 -226.7 61 DEC 28 55193 9.7 46 -226.2 63 DEC 29 55194 5.6 46 -227.0 61