CIRCULAR T 315 ISSN 1143-1393 2014 APRIL 08, 17h UTC BUREAU INTERNATIONAL DES POIDS ET MESURES ORGANISATION INTERGOUVERNEMENTALE DE LA CONVENTION DU METRE PAVILLON DE BRETEUIL F-92312 SEVRES CEDEX TEL. +33 1 45 07 70 70 FAX. +33 1 45 34 20 21 tai@bipm.org 1 - Coordinated Universal Time UTC and its local realizations UTC(k). Computed values of [UTC-UTC(k)] and uncertainties valid for the period of this Circular. From 2012 July 1, 0h UTC, TAI-UTC = 35 s. Date 2014 0h UTC FEB 26 MAR 3 MAR 8 MAR 13 MAR 18 MAR 23 MAR 28 Uncertainty/ns Notes MJD 56714 56719 56724 56729 56734 56739 56744 uA uB u Laboratory k [UTC-UTC(k)]/ns AOS (Borowiec) -3.6 -2.7 -0.7 0.7 0.1 0.2 1.3 0.3 5.3 5.3 APL (Laurel) 1.0 2.2 2.6 1.7 2.5 - 101.9 0.3 5.3 5.3 AUS (Sydney) 76.7 70.0 61.4 63.1 68.4 67.0 67.5 0.3 5.3 5.3 BEV (Wien) -9.1 -10.3 -5.8 -8.3 -14.6 -17.8 -7.2 0.3 3.5 3.5 BIM (Sofiya) 805.4 821.0 852.9 882.5 905.2 936.3 955.5 1.5 7.2 7.4 BIRM (Beijing) 92.6 108.7 126.8 141.8 156.2 169.1 181.7 1.5 20.1 20.1 BY (Minsk) -1.9 3.5 9.4 8.4 15.0 19.5 18.9 1.5 7.2 7.4 CAO (Cagliari) -6182.9 -6168.1 -6178.4 -6190.4 -6206.5 -6207.6 -6206.8 8.0 7.2 10.8 CH (Bern-Wabern) 26.6 24.8 23.5 23.9 23.1 19.4 16.1 0.3 2.0 2.1 CNM (Queretaro) 24.9 24.3 21.8 18.4 18.5 9.7 8.6 2.0 5.3 5.7 CNMP (Panama) 28.4 39.5 56.9 69.4 49.9 47.9 47.8 3.5 5.3 6.4 DLR (Oberpfaffenhofen) - - - - - - - DMDM (Belgrade) 11.8 10.0 11.6 19.2 3.4 -3.1 -9.6 0.3 7.2 7.2 DTAG (Frankfurt/M) 71.2 67.4 61.6 55.4 52.7 53.2 52.0 0.3 10.1 10.1 EIM (Thessaloniki) 18.0 8.5 15.8 14.5 15.1 18.6 21.2 7.4 5.3 9.1 ESTC (Noordwijk) -0.9 -0.6 -0.8 -0.4 -0.6 0.4 1.0 0.3 5.2 5.3 HKO (Hong Kong) 546.4 551.7 560.1 566.0 577.0 582.0 588.1 0.3 5.3 5.3 IFAG (Wettzell) -1096.3 -1104.2 -1108.3 -1116.6 -1122.0 -1124.8 -1132.8 0.3 5.2 5.3 IGNA (Buenos Aires) - - 220.5 303.9 399.8 478.6 572.2 2.0 5.3 5.7 INPL (Jerusalem) -11.5 -18.6 -21.0 -22.2 -26.3 -31.1 -37.5 0.3 20.0 20.0 INTI (Buenos Aires) -32.6 -20.8 -7.9 -21.9 -20.5 -17.6 -7.7 2.5 20.1 20.2 INXE (Rio de Janeiro) 7.0 2.3 -1.9 -1.0 -0.9 6.9 7.2 0.3 20.1 20.1 IPQ (Caparica) -7.8 3.5 6.8 6.5 0.9 3.3 9.9 0.4 7.2 7.2 IT (Torino) -0.6 -0.3 -0.5 -0.5 -0.4 -0.4 -0.2 0.3 2.1 2.1 JATC (Lintong) 0.1 -2.5 -7.1 -4.3 -1.1 -4.3 -0.8 0.5 5.2 5.2 JV (Kjeller) 703.7 685.1 693.2 674.8 694.9 688.6 670.2 5.0 20.1 20.7 KEBS (Nairobi) 6500.0 6609.3 6722.5 6855.6 6972.8 7095.8 7217.3 1.5 20.1 20.1 KIM (Serpong-Tangerang) 1039.3 1051.1 1071.0 1074.2 1093.3 1118.6 1169.7 2.0 20.1 20.2 KRIS (Daejeon) -2.4 -3.0 -2.7 -2.3 -2.5 -3.0 -3.2 0.3 5.2 5.2 KZ (Astana) 156.7 109.6 61.7 3.2 -47.4 -98.8 -148.8 2.5 20.1 20.2 Date 2014 0h UTC FEB 26 MAR 3 MAR 8 MAR 13 MAR 18 MAR 23 MAR 28 Uncertainty/ns Notes MJD 56714 56719 56724 56729 56734 56739 56744 uA uB u Laboratory k [UTC-UTC(k)]/ns LT (Vilnius) 530.3 532.2 553.2 535.3 535.3 539.6 527.1 2.0 5.3 5.7 MIKE (Espoo) 13.6 13.7 13.9 15.0 16.0 16.9 18.5 0.3 7.2 7.2 MKEH (Budapest) -12592.3 -12795.9 -12998.4 -13196.6 -13412.0 -13623.9 -13827.3 1.5 20.1 20.1 MSL (Lower Hutt) 110.2 74.5 30.7 -5.2 -59.4 -101.3 -144.9 1.5 20.1 20.1 MTC (Makkah) 95.9 132.3 164.5 199.6 208.2 31.7 35.4 10.0 20.1 22.4 (1) NAO (Mizusawa) 21.4 17.5 17.5 14.0 20.8 24.4 26.1 2.0 20.1 20.2 NICT (Tokyo) -1.7 -3.1 -3.4 -4.8 -6.6 -6.7 -6.7 0.3 4.9 4.9 NIM (Beijing) 2.6 1.3 -0.4 0.0 1.0 1.2 0.9 0.7 5.1 5.1 NIMB (Bucharest) 265.1 272.2 264.5 277.1 295.5 298.6 310.4 4.5 20.1 20.6 NIMT (Pathumthani) -12.2 -22.5 -23.0 -27.9 -26.7 -33.7 -42.4 1.0 20.1 20.1 NIS (Cairo) -2363.4 - - - - - - 1.5 7.2 7.4 NIST (Boulder) 5.2 5.7 6.2 6.3 6.3 5.8 5.7 0.3 5.1 5.1 NMIJ (Tsukuba) 3.8 3.6 3.8 3.8 2.8 1.3 0.8 0.3 5.2 5.2 NMLS (Sepang) -902.5 -981.2 -1047.5 -1119.0 -1201.4 -1282.3 -1347.8 1.0 20.1 20.1 NPL (Teddington) 21.8 21.5 20.4 19.7 19.2 18.3 18.9 0.3 7.1 7.1 NPLI (New-Delhi) -7.0 -5.5 -3.1 -1.5 -3.4 -9.2 -14.5 0.3 7.2 7.2 NRC (Ottawa) 10.0 12.0 5.5 6.9 10.1 10.1 7.1 0.3 5.3 5.3 NRL (Washington DC) 54.8 62.4 71.3 80.6 86.3 96.7 104.2 0.7 5.3 5.4 NTSC (Lintong) -1.6 -2.9 -2.9 -1.4 0.8 -0.6 -1.0 0.5 5.1 5.1 ONBA (Buenos Aires) -1518.4 -1520.4 -1535.4 -1549.4 -1559.9 -1573.9 -1573.8 2.5 5.3 5.9 ONRJ (Rio de Janeiro) 7.3 0.1 -3.1 -1.8 2.0 -0.3 0.2 1.3 7.1 7.3 OP (Paris) 0.8 0.2 0.2 0.8 0.7 0.5 0.7 0.3 2.0 2.1 ORB (Bruxelles) -6.0 3.9 0.0 6.8 8.2 -1.0 -0.5 0.3 5.3 5.3 PL (Warszawa) 18.1 9.5 -6.1 -24.3 -43.4 -62.0 -62.2 0.3 5.2 5.3 PTB (Braunschweig) -0.8 -0.6 -0.3 0.7 0.9 0.0 -0.1 0.1 1.8 1.8 ROA (San Fernando) 1.2 -0.2 -0.5 0.9 1.6 3.0 3.4 0.3 5.3 5.3 SASO (Riyadh) 48.0 52.7 55.7 59.7 68.6 74.7 81.3 0.7 7.2 7.3 SCL (Hong Kong) 9.4 6.4 12.6 12.7 17.7 15.7 20.1 4.0 10.1 10.9 SG (Singapore) -6.0 -10.9 -15.3 -14.2 -3.8 1.6 -3.4 0.4 5.3 5.3 SIQ (Ljubljana) -1774.7 -1790.3 -1801.6 -1813.9 -1831.5 -1829.4 -1820.8 4.0 20.1 20.5 SMD (Bruxelles) 13.7 15.1 10.2 8.7 7.6 4.6 0.9 0.7 20.0 20.0 SMU (Bratislava) 276.9 - 188.2 184.0 182.5 189.7 177.9 2.5 20.1 20.2 SP (Boras) 8.0 9.4 11.0 12.0 12.1 12.4 10.7 0.3 2.0 2.0 SU (Moskva) 1.7 0.0 -0.4 -0.1 -0.8 -1.4 -1.6 0.5 2.0 2.1 TCC (Concepcion) 3289.1 3303.8 3317.9 3339.7 3362.9 3395.0 3425.4 0.3 5.3 5.3 TL (Chung-Li) -8.8 -8.4 -4.6 -4.6 -6.0 -8.2 -8.6 0.3 5.2 5.2 TP (Praha) -7.6 -11.8 -17.7 -16.1 -28.1 -27.2 -12.6 0.3 5.3 5.3 UA (Kharkov) -0.5 -2.0 -2.3 -8.6 -15.6 -14.5 -10.4 1.5 7.2 7.4 UME (Gebze-Kocaeli) 4.9 1.4 2.3 17.7 12.2 12.3 12.8 1.5 7.2 7.4 USNO (Washington DC) -0.1 0.9 0.7 1.4 1.7 1.3 1.6 0.2 3.4 3.4 VMI (Ha Noi) 37.7 31.9 20.6 16.1 11.9 11.5 8.3 0.3 20.1 20.1 VSL (Delft) -0.4 -1.5 -4.2 1.3 -2.1 -0.5 1.0 0.3 2.0 2.1 ZA (Pretoria) -3474.4 -3504.6 -3531.3 -3574.6 -3600.0 -3639.8 -3675.1 1.5 20.1 20.1 - Note on section 1: (1) MTC : Apparent time step of UTC(MTC) of about +200ns on MJD 56734.5. 2 - International Atomic Time TAI and Local atomic time scales TA(k). Computed values of [TAI-TA(k)]. Date 2014 0h UTC FEB 26 MAR 3 MAR 8 MAR 13 MAR 18 MAR 23 MAR 28 MJD 56714 56719 56724 56729 56734 56739 56744 Laboratory k [TAI-TA(k)]/ns CH (Bern-Wabern) 27291.0 27217.1 27145.4 27074.3 27001.4 26926.1 26852.3 F (Paris) 167625.5 167628.4 167628.2 167628.9 167629.3 167629.2 167629.9 JATC (Lintong) -55180.9 -55208.7 -55238.2 -55268.5 -55295.6 -55327.5 -55360.9 KRIS (Daejeon) 44879.4 44897.8 44917.1 44936.2 44954.5 44972.5 44990.3 NICT (Tokyo) 1080.3 1083.2 1086.6 1089.1 1092.3 1096.0 1098.9 NIST (Boulder) -45401242.6 -45401430.4 -45401618.1 -45401805.8 -45401993.5 -45402181.8 -45402369.6 NRC (Ottawa) 22845.7 22831.1 22807.7 22792.2 22778.6 22762.2 22742.2 NTSC (Lintong) 18083.6 18113.0 18142.5 18173.3 18204.1 18233.0 18263.5 ONRJ (Rio de Janeiro) -17620.2 -17698.2 -17773.2 -17848.4 -17920.7 -17995.2 -18069.4 PL (Warszawa) -12406.4 -12417.5 -12427.6 -12439.7 -12442.7 -12458.0 -12470.4 PTB (Braunschweig) 2008.4 2008.8 2009.0 2009.6 2009.8 2008.8 2009.1 SG (Singapore) 15064.0 15109.1 15144.7 15195.8 15246.2 15291.6 15326.6 SU (Moskva) 27291055.7 27291054.0 27291053.6 27291053.9 27291053.2 27291052.6 27291052.4 (1) TL (Chung-Li) -53.0 -57.5 -62.2 -65.4 -71.3 -72.2 -74.9 USNO (Washington DC) -35145249.0 -35145535.2 -35145823.3 -35146111.0 -35146398.3 -35146686.5 -35146973.9 - Note on section 2: (1) SU : Listed values are TAI-TA(SU) - 2.80 seconds. 3 - Difference between the normalized frequencies of EAL (free atomic time scale) and TAI. Interval of validity f(EAL)-f(TAI) Steering correction 56714 - 56744 6.483x10**-13 (2014 FEB 26 - 2014 MAR 28) New correction 56744 - 56774 6.483x10**-13 (2014 MAR 28 - 2014 APR 27) New correction foreseen 56774 - 56804 6.483x10**-13 (2014 APR 27 - 2014 MAY 27) 4 - Duration of the TAI scale interval. TAI is a realization of coordinate time TT. The following tables give the fractional deviation d of the scale interval of TAI from that of TT (the SI second on the geoid), i.e. the fractional frequency deviation of TAI with the opposite sign: d = -yTAI. In this section, a frequency over a time interval is defined as the ratio of the end-point phase difference to the duration of the interval. Whenever needed, the instability of EAL should be expressed as the quadratic sum of three components with t in days: (1) a white frequency noise of 2.0x10**-15 / sqrt(t), (2) a flicker frequency noise of 0.4x10**-15 and (3) a random walk frequency noise of 0.3x10**-16 x sqrt(t). The relation between EAL and TAI is given in Circular T and the BIPM Annual Report on Time Activities. In the first table, d is obtained, on the given periods of estimation by comparison of the TAI frequency with that of the given individual Primary and Secondary Frequency Standards (PFS/SFS). In this table: uA is the uncertainty originating in the instability of the standard, uB is the combined uncertainty from systematic effects, ul/lab is the uncertainty in the link between the standard and the clock participating to TAI, including the uncertainty due to the dead-time, ul/TAI is the uncertainty in the link to TAI, u is the quadratic sum of all four uncertainty values. Ref(uB) is a reference giving information on the values of uB or is the Circular T where the reference was first given. uB(Ref) is the uB value stated in this reference. Note that all uncertainties may vary over time and that the current uB values are generally not the same as the peer reviewed values given in Ref(uB). See "http://www.bipm.org/jsp/en/TimeFtp.jsp" for previous issues of Circular T and individual Reports of Evaluation of Primary and Secondary Frequency Standards that explain changes in uncertainties. For the SFS, uSrep represents the recommended uncertainty of the secondary representation of the second and Ref(uS) provides the reference for the frequency of the transition and its uncertainty uSrep, these two fields are not applicable to PFS. All values are expressed in 10**-15 and are valid only for the stated period of estimation. Standard Period of d uA uB ul/Lab ul/Tai u uSrep Ref(uS) Ref(uB) uB(Ref) Note Estimation PTB-CS1 56714 56744 -9.24 6.00 8.00 0.00 0.07 10.00 PFS/NA T148 8. (1) PTB-CS2 56714 56744 -0.83 3.00 12.00 0.00 0.07 12.37 PFS/NA T148 12. (1) NPL-CsF2 56714 56744 -0.09 0.22 0.22 0.09 0.20 0.38 PFS/NA T284 0.23 (2) SYRTE-FO1 56714 56744 -0.84 0.25 0.40 0.11 0.20 0.52 PFS/NA T301 0.37 (3) SYRTE-FO2 56719 56744 -1.63 0.20 0.27 0.11 0.23 0.42 PFS/NA T301 0.23 (3) PTB-CSF1 56729 56739 -0.12 0.13 0.73 0.02 0.18 0.76 PFS/NA T162 1.40 (4) PTB-CSF2 56729 56739 0.02 0.16 0.35 0.02 0.18 0.42 PFS/NA T287 0.41 (4) NIST-F2 56489 56534 -1.22 0.44 0.15 0.16 0.14 0.51 PFS/NA [1] 0.11 (5) IT-CsF2 56079 56099 2.38 0.32 0.25 0.20 0.28 0.53 PFS/NA [2] 0.18 (6) IT-CsF2 56194 56214 -0.11 0.42 0.21 0.20 0.28 0.58 PFS/NA [2] 0.18 (6) IT-CsF2 56234 56249 -0.93 0.31 0.18 0.10 0.37 0.52 PFS/NA [2] 0.18 (6) IT-CsF2 56394 56424 -0.20 0.34 0.18 0.20 0.20 0.48 PFS/NA [2] 0.18 (6) IT-CsF2 56614 56634 -1.31 0.33 0.18 0.20 0.28 0.51 PFS/NA [2] 0.18 (7) IT-CsF2 56634 56649 -0.74 0.41 0.18 0.20 0.37 0.61 PFS/NA [2] 0.18 (7) SU-CsFO2 56379 56409 -0.06 0.36 0.50 0.11 0.65 0.90 PFS/NA [3] 0.50 (8) SU-CsFO2 56409 56439 0.49 0.28 0.50 0.10 0.65 0.87 PFS/NA [3] 0.50 (8) SU-CsFO2 56439 56469 0.79 0.26 0.50 0.10 0.65 0.87 PFS/NA [3] 0.50 (8) SU-CsFO2 56484 56504 0.41 0.33 0.50 0.11 0.94 1.12 PFS/NA [3] 0.50 (9) SU-CsFO2 56504 56534 -0.73 0.30 0.50 0.11 0.65 0.88 PFS/NA [3] 0.50 (10) SU-CsFO2 56684 56714 -0.50 0.29 0.50 0.10 0.33 0.67 PFS/NA [3] 0.50 (11) Notes: (1) Continuously operating as a clock participating to TAI (2) Report 31 MAR. 2014 by NPL (3) Report 31 MAR. 2014 by LNE-SYRTE (4) Report 01 APR. 2014 by PTB (5) Report 11 MAR. 2014 by NIST (6) Report 18 DEC. 2013 by IT (7) Report 04 FEB. 2014 by IT (8) Report 11 SEP. 2013 by SU (9) Report 02 AUG. 2013 by SU (10) Report 02 SEP. 2013 by SU (11) Report 28 FEB. 2014 by SU [1] First Accuracy Evaluation of NIST-F2 Thomas P. Heavner, Elizabeth A. Donley, Filippo Levi, Giovanni Costanzo, Thomas E. Parker, Jon H. Shirley, Neil Ashby, Metrologia, 2014, accepted. [2] Accuracy evaluation of ITCsF2: a Nitrogen cooled Cesium Fountain. Filippo Levi, Davide Calonico, Claudio E. Calosso, Aldo Godone, Salvatore Micalizio, Giovanni A. Costanzo Metrologia, submitted. [3] Yu. S. Domnin, V. N. Baryshev, A. I. Boyko, G. A. Elkin, A. V. Novoselov, L. N. Kopylov, and D. S. Kupalov Measurement Techniques, Vol. 55, No. 10, January, 2013 The second table gives the BIPM estimate of d, based on all available PFS and SFS measurements over the period MJD 56354-56744, taking into account their individual uncertainties and characterizing the instability of EAL as noted above. u is the computed standard uncertainty of d Period of estimation d u 56714-56744 -0.62x10**-15 0.23x10**-15 (2014 FEB 26 - 2014 MAR 28) 5 - Relations of UTC and TAI with predictions of UTC(k) disseminated by GNSS and their System Times. [UTC-GPS time] = -16 s +C0 , [TAI-GPS time] = 19 s + C0 , global uncertainty is of the order of 10 ns. [UTC-UTC(USNO)_GPS] = C0', [TAI-UTC(USNO)_GPS] = 35 s + C0', global uncertainty is of the order of 10 ns. [UTC-GLONASS time] = C1 , [TAI-GLONASS time] = 35 s + C1 , global uncertainty is of the order of hundreds ns. [UTC-UTC(SU)_GLONASS]= C1', [TAI-UTC(SU)_GLONASS]= 35 s + C1', global uncertainty is of the order of hundreds ns. [UTC(USNO)_GPS] and [UTC(SU)_GLONASS] are, respectively, UTC(USNO) and UTC(SU) as predicted by USNO and SU and disseminated by GPS and GLONASS. The C0 and C0' values provide realizations of GPS time and of the prediction of UTC(USNO) broadcast by GPS, 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 and C1' values provide realizations of GLONASS time and of the prediction of UTC(SU) broadcast by GLONASS, as obtained using the values [UTC-UTC(AOS)] and the GLONASS data taken at the Astrogeodynamical Observatory Borowiec (AOS). N0, N0', N1 and N1' are the numbers of measurements; when N0, N0', N1 or N1' is 0, the corresponding values in the table are interpolated. The standard deviations S0, S0', S1 and S1' characterize the dispersion of individual measurements. The actual uncertainty of users’ access to GPS and GLONASS times may differ from these values. For this edition of circular, S0= 1.4 ns, S0'= 1.5 ns, S1= 6.5 ns, S1'= 6.5 ns 2014 0h UTC MJD C0/ns N0 C0'/ns N0' C1/ns N1 C1'/ns N1' FEB 26 56714 -4.7 72 -1.4 72 -212.5 86 -408.9 85 FEB 27 56715 -3.9 89 -1.1 89 -209.7 85 -407.5 86 FEB 28 56716 -3.0 87 -3.3 87 -209.2 90 -408.4 90 MAR 1 56717 -2.6 86 -3.4 86 -211.2 88 -411.9 88 MAR 2 56718 -3.2 89 -3.3 89 -211.7 89 -413.5 89 MAR 3 56719 -3.1 89 -3.5 89 -209.1 87 -411.4 87 MAR 4 56720 -2.0 89 -1.9 90 -203.6 86 -406.0 86 MAR 5 56721 -2.8 89 -4.1 89 -200.1 89 -402.0 89 MAR 6 56722 -2.4 89 -2.0 89 -198.3 84 -399.9 84 MAR 7 56723 -1.9 89 -1.6 88 -197.9 89 -398.9 89 MAR 8 56724 -1.4 88 -3.7 90 -196.7 90 -396.5 90 MAR 9 56725 -2.7 89 -3.1 88 -194.9 89 -393.0 89 MAR 10 56726 -3.5 89 -1.7 89 -194.1 74 -390.8 75 MAR 11 56727 -3.2 89 -2.4 89 -194.0 75 -389.0 75 MAR 12 56728 -2.2 90 -1.8 90 -195.6 66 -389.1 66 MAR 13 56729 -3.4 89 -2.3 89 -198.6 89 -390.1 88 MAR 14 56730 -2.6 87 -0.9 87 -201.0 70 -390.3 69 MAR 15 56731 -1.3 88 -0.2 88 -200.5 89 -387.9 89 MAR 16 56732 -0.1 90 -0.5 90 -200.9 90 -386.7 90 MAR 17 56733 0.1 89 -0.9 89 -202.1 88 -386.7 88 MAR 18 56734 1.1 89 -0.5 89 -200.5 78 -384.3 78 MAR 19 56735 1.4 89 -2.0 89 -196.4 84 -380.4 84 MAR 20 56736 0.2 90 -2.0 89 -194.6 87 -379.4 86 MAR 21 56737 -1.3 89 -2.1 89 -196.2 87 -381.0 87 MAR 22 56738 -2.6 87 -3.6 87 -194.3 86 -378.9 86 MAR 23 56739 -2.9 85 -0.5 86 -192.1 89 -377.3 89 MAR 24 56740 -2.4 90 -0.9 89 -193.1 90 -379.4 90 MAR 25 56741 -2.8 89 -2.6 89 -194.0 89 -380.9 89 MAR 26 56742 -2.1 88 -1.8 88 -193.9 79 -381.1 79 MAR 27 56743 -0.9 89 0.0 89 -192.4 86 -380.3 86 MAR 28 56744 -1.0 89 -0.5 90 -189.7 84 -378.7 82 6 - Time links used for the computation of TAI and their uncertainties. The time links used in the elaboration of this Circular T are listed in this section. The technique for the link is indicated as follows: GPS SC for GPS all-in-view single-channel C/A data; GPS MC for GPS all-in-view multi-channel C/A data; GPS P3 for GPS all-in-view multi-channel dual-frequency P code data; GPS PPP for GPS Precise Point Positioning technique; GPS GT for 'GPS time' observations; GLN MC for GLONASS common-view multi-channel C/A data; GPSGLN for the combination of GPS MC and GLN MC links; TWGPPP/TWGPP3 for the combined smoothing of TWSTFT and GPS PPP/GPS P3; INT LK for internal cable link and TWSTFT for two-way satellite time and frequency transfer data. For each link, the following uncertainties are provided: uA is the standard uncertainty accounting for measurement noise and random effects with typical duration between 1 day and 30 days. uB is the estimated uncertainty of the calibration. The calibration type of the link is indicated as: GPS EC for GPS equipment calibration; TW EC for two-way equipment calibration; LC (technique) for a link calibrated using 'technique'; BC (technique) for a link calibrated using 'technique' to transfer a past equipment calibration through a discontinuity of link operation. DIC is used for direct internal calibration. The calibration dates indicate: the most recent calibration results for the two laboratories in the case of EC and the most recent calibration of the link in the case of LC and BC. NA stands for not available, in this case estimated values are provided. Link Type uA/ns uB/ns Calibration Type Calibration Dates AOS /PTB TWGPPP 0.3 5.0 BC(GPS MC) 2008 May APL /PTB GPSPPP 0.3 5.0 LC(GPS MC) 2012 Sep AUS /PTB GPSPPP 0.3 5.0 GPS EC/GPS EC 2010 Oct/2004 Aug BEV /PTB GPSPPP 0.3 3.0 BC(GPS MC) 2012 Mar BIM /PTB GPS MC 1.5 7.0 GPS EC/GPS EC 2007 Nov BIRM/PTB GPS MC 1.5 20.0 NA /GPS EC NA /2006 Sep BY /PTB GPS MC 1.5 7.0 GPS EC/GPS EC 2008 Jun/2006 Sep CAO /PTB GPS MC 8.0 7.0 GPS EC/GPS EC 2004 Nov/2006 Sep CH /PTB TWGPPP 0.3 1.0 LC(TWSTFT)/BC(GPS PPP) 2008 Sep/2009 Aug CNM /PTB GPSGLN 2.0 5.0 LC(GPS MC) 2012 Mar CNMP/PTB GPS MC 3.5 5.0 GPS EC/GPS EC 2004 May/2006 Sep DLR /PTB NA DMDM/PTB GPSPPP 0.3 7.0 LC(GPS MC) 2012 Jul DTAG/PTB GPSPPP 0.3 10.0 LC(GPS MC) 2009 Jul EIM /PTB GPS MC 7.5 5.0 GPS EC/GPS EC 2007 May/2003 Aug ESTC/PTB GPSPPP 0.3 5.0 GPS EC/GPS EC 2012 Nov/2004 Aug HKO /PTB GPSPPP 0.3 5.0 LC(GPS MC) 2013 Apr IFAG/PTB GPSPPP 0.3 5.0 GPS EC/GPS EC 2003 Jun/2004 Aug IGNA/PTB GPS MC 2.0 5.0 GPS EC/GPS EC 2004 Aug/2006 Sep INPL/PTB GPSPPP 0.3 20.0 NA /GPS EC NA /2004 Aug Link Type uA/ns uB/ns Calibration Type Calibration Dates INTI/PTB GPS MC 2.5 20.0 NA /GPS EC NA /2006 Sep INXE/PTB GPSPPP 0.3 20.0 NA /GPS EC NA /2006 Sep IPQ /PTB GPSPPP 0.4 7.0 LC(GPS MC) 2010 Aug IT /PTB TWGPPP 0.3 1.2 LC(TWSTFT)/BC(GPS PPP) 2008 Sep/2009 Aug JATC/NTSC INT LK 0.2 1.0 DIC /2006 Sep JV /PTB GPS GT 5.0 20.0 NA /GPS EC NA /2003 Aug KEBS/PTB GPS MC 1.5 20.0 NA /GPS EC NA /2006 Sep KIM /PTB GPS MC 2.0 20.0 NA /GPS EC NA /2006 Sep KRIS/PTB GPSPPP 0.3 5.0 GPS EC/GPS EC 2005 Aug/2004 Aug KZ /PTB GPSGLN 2.5 20.0 NA /GPS EC NA /2006 Sep LT /PTB GPS MC 2.0 5.0 GPS EC/GPS EC 2006 Oct/2006 Sep MIKE/PTB GPSPPP 0.3 7.0 NA /GPS EC NA /2004 Aug MKEH/PTB GPS MC 1.5 20.0 NA /GPS EC NA /2006 Sep MSL /PTB GPS P3 1.5 20.0 NA /GPS EC NA /2004 Aug MTC /PTB GPS MC 10.0 20.0 NA /GPS EC NA /2004 Aug NAO /PTB GPS MC 2.0 20.0 NA /GPS EC NA /2006 Sep NICT/PTB TWGPPP 0.3 5.0 LC(GPS P3) 2009 Jun NIM /PTB TWGPPP 0.7 5.0 LC(GPS P3) 2012 Oct NIMB/PTB GPS MC 4.5 20.0 NA /GPS EC NA /2006 Sep NIMT/PTB GPS P3 1.0 20.0 NA /GPS EC NA /2004 Aug NIS /PTB GPSGLN 1.5 7.0 GPS EC/GPS EC 2005 May/2006 Sep NIST/PTB TWGPPP 0.3 5.0 LC(TWSTFT)/BC(GPS PPP) 2005 May/2009 Aug NMIJ/PTB GPSPPP 0.3 5.0 GPS EC/GPS EC 2002 Apr/2004 Aug NMLS/PTB GPS P3 1.0 20.0 NA /GPS EC NA /2006 Sep NPL /PTB GPSPPP 0.3 7.0 LC(GPS P3) 2008 Sep/2009 Nov NPLI/PTB TWGPPP 0.3 7.0 LC(GPS P3) 2012 Jun NRC /PTB GPSPPP 0.3 5.0 GPS EC/GPS EC 2003 Nov/2004 Aug NRL /PTB GPS P3 0.7 5.0 GPS EC/GPS EC 2002 May/2004 Aug NTSC/PTB TWGPPP 0.5 5.0 BC(GPS MC) 2009 May ONBA/PTB GPS MC 2.5 5.0 GPS EC/GPS EC 2004 Jul/2006 Sep ONRJ/PTB GPS P3 1.3 7.0 GPS EC/GPS EC 2011 Dec/2006 Sep OP /PTB TWGPPP 0.3 1.1 LC(TWSTFT)/BC(GPS PPP) 2008 Sep/2009 Aug ORB /PTB GPSPPP 0.3 5.0 GPS EC/GPS EC 2012 Oct/2004 Aug PL /PTB GPSPPP 0.3 5.0 LC(GPS MC) 2012 Mar ROA /PTB TWGPPP 0.3 5.0 LC(TWSTFT)/BC(GPS PPP) 2005 May/2009 Aug SASO/PTB GPS P3 0.7 7.0 GPS EC/GPS EC 2012 Nov/2006 Sep SCL /PTB GPS MC 4.0 10.0 LC(GPS SC) 1993 May SG /PTB GPSPPP 0.4 5.0 GPS EC/GPS EC 2010 Mar/2004 Aug SIQ /PTB GPS SC 4.0 20.0 NA /GPS EC NA /2003 Aug SMD /PTB GPS P3 0.7 20.0 NA /GPS EC NA /2006 Sep SMU /PTB GPSGLN 2.5 20.0 NA /GPS EC NA /2006 Sep SP /PTB TWGPPP 0.3 1.0 LC(TWSTFT)/BC(GPS PPP) 2006 Mar/2009 Aug SU /PTB TWSTFT 0.5 1.1 LC(TWSTFT) 2012 Nov TCC /PTB GPSPPP 0.3 5.0 GPS EC/GPS EC 2011 Feb/2004 Aug TL /PTB TWGPPP 0.3 5.0 LC(GPS PPP) 2011 Dec TP /PTB GPSPPP 0.3 5.0 GPS EC/GPS EC 2009 Feb/2004 Aug UA /PTB GPS MC 1.5 7.0 GPS EC/GPS EC 2011 Mar/2006 Sep UME /PTB GPS MC 1.5 7.0 GPS EC/GPS EC 2005 Dec/2006 Sep USNO/PTB GPSPPP 0.3 5.0 GPS EC/GPS EC 2001 /2004 Aug VMI /PTB GPSPPP 0.3 20.0 NA /GPS EC NA /2004 Aug VSL /PTB TWGPPP 0.3 1.0 LC(TWSTFT)/BC(GPS PPP) 2006 Mar/2009 Aug ZA /PTB GPS P3 1.5 20.0 NA /GPS EC NA /2004 Aug