CIRCULAR T 302 ISSN 1143-1393 2013 MARCH 08, 10h 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 2013 0h UTC JAN 27 FEB 1 FEB 6 FEB 11 FEB 16 FEB 21 FEB 26 Uncertainty/ns Notes MJD 56319 56324 56329 56334 56339 56344 56349 uA uB u Laboratory k [UTC-UTC(k)]/ns AOS (Borowiec) -8.0 -8.7 -9.7 -10.7 -10.4 -10.6 -10.9 0.3 5.2 5.3 APL (Laurel) 3.2 3.5 3.3 -0.8 -2.0 -2.9 -2.5 0.3 5.2 5.3 AUS (Sydney) 415.6 416.1 414.0 413.5 409.1 403.9 406.1 0.3 5.2 5.2 BEV (Wien) -39.5 -44.8 -59.5 -71.3 -58.4 -48.5 -48.3 0.3 3.4 3.4 BIM (Sofiya) 1890.8 1905.3 1924.2 1937.9 88.5 95.3 91.4 1.5 7.2 7.3 (1) BIRM (Beijing) 206.5 210.8 213.5 222.5 220.3 214.7 216.8 1.5 20.1 20.1 BY (Minsk) -38.4 -34.2 -34.4 -32.3 -27.8 -28.2 -27.5 1.5 7.2 7.3 CAO (Cagliari) - - - - - - - CH (Bern-Wabern) 5.2 0.0 -5.5 -3.6 3.7 7.1 13.6 0.3 1.9 1.9 CNM (Queretaro) -19.1 -17.0 -10.7 -14.1 -12.7 -12.9 -10.2 2.0 5.2 5.6 CNMP (Panama) -24.6 -13.6 -15.0 -11.7 -19.6 -25.0 -34.6 3.5 5.2 6.2 DLR (Oberpfaffenhofen) 39.6 39.9 35.9 25.9 16.2 1.2 1.3 0.7 5.2 5.3 DMDM (Belgrade) 9.7 20.1 15.9 7.7 -6.1 -8.2 -9.1 0.3 7.1 7.2 DTAG (Frankfurt/M) 303.9 291.6 292.6 295.6 286.6 276.2 266.5 0.3 10.1 10.1 EIM (Thessaloniki) - - - - - - - ESTC (Noordwijk) -47.2 5.3 3.0 -0.1 -0.5 0.1 -2.1 0.7 20.1 20.1 (2) HKO (Hong Kong) 881.2 902.5 920.9 932.0 952.1 963.6 977.8 2.5 5.2 5.8 IFAG (Wettzell) -590.3 -594.8 -591.9 -597.1 -603.3 -610.2 -615.6 0.3 5.2 5.2 IGNA (Buenos Aires) 11002.6 11069.3 11138.0 11194.4 11255.7 11311.9 11377.5 2.0 5.2 5.6 INPL (Jerusalem) -181.4 -185.9 -196.2 -209.3 -216.7 -224.6 -224.9 0.7 19.9 19.9 INTI (Buenos Aires) 43.9 22.1 22.1 2.7 -12.4 -16.3 -5.6 4.0 20.1 20.5 INXE (Rio de Janeiro) -24.7 -17.2 -14.8 -14.0 -9.4 -6.2 -3.6 0.3 20.1 20.1 IPQ (Caparica) - - - - - - - IT (Torino) -11.1 -10.6 -10.1 -9.3 -7.6 -6.6 -5.3 0.3 2.0 2.0 JATC (Lintong) -5.4 -4.3 -4.9 -5.6 -4.3 -2.5 -2.7 0.5 5.1 5.1 JV (Kjeller) 338.4 377.6 374.3 391.5 389.4 394.5 373.5 5.0 20.0 20.6 KEBS (Nairobi) 378.0 471.1 577.0 687.1 781.4 893.0 989.5 1.5 20.1 20.1 KIM (Serpong-Tangerang) 301.1 - - - - - - 2.0 20.1 20.2 KRIS (Daejeon) 31.9 28.3 23.5 18.2 14.1 10.0 6.7 0.3 5.1 5.1 KZ (Astana) - - - - - - - Date 2013 0h UTC JAN 27 FEB 1 FEB 6 FEB 11 FEB 16 FEB 21 FEB 26 Uncertainty/ns Notes MJD 56319 56324 56329 56334 56339 56344 56349 uA uB u Laboratory k [UTC-UTC(k)]/ns LT (Vilnius) 267.4 260.8 265.4 265.5 285.5 275.0 282.3 2.0 5.2 5.6 MIKE (Espoo) -3.5 -3.1 -2.8 -2.2 -1.3 -0.9 -0.1 0.3 7.2 7.2 MKEH (Budapest) 3596.5 3392.5 3196.7 2996.1 2787.8 2585.0 2394.2 1.5 20.0 20.1 MSL (Lower Hutt) - 315.8 319.8 326.7 382.6 409.5 416.9 1.5 20.1 20.1 MTC (Makkah) 9.0 6.5 9.0 9.6 7.9 10.6 8.8 8.0 20.1 21.6 NAO (Mizusawa) -10.7 -16.6 -15.6 -14.6 -13.4 -15.7 -18.0 2.0 19.9 20.0 NICT (Tokyo) -12.4 -11.4 -10.5 -9.0 -10.0 -13.2 -15.0 0.3 4.7 4.7 NIM (Beijing) -4.2 -5.2 -6.7 -6.7 -5.3 -3.8 -3.0 0.3 5.2 5.2 NIMB (Bucharest) 434.2 436.6 464.5 469.6 -275.2 -239.3 -230.0 2.0 20.0 20.1 (3) NIMT (Pathumthani) -10.9 -32.4 -21.4 -15.4 0.3 11.9 -1.0 1.0 20.0 20.0 NIS (Cairo) 15.8 99.2 188.8 2.8 52.0 115.8 184.3 0.8 7.2 7.2 (4) NIST (Boulder) -16.8 -17.9 -19.0 -20.1 -20.2 -19.7 -18.5 0.3 5.1 5.1 NMIJ (Tsukuba) -8.9 -6.3 -6.0 -5.6 -4.3 -3.6 -1.9 0.4 5.2 5.2 NMLS (Sepang) -317.5 -295.4 -273.3 -257.3 -235.3 -210.0 -198.6 1.5 20.1 20.1 NPL (Teddington) 3.2 2.3 2.7 3.4 4.6 2.2 0.7 0.3 5.2 5.2 NPLI (New-Delhi) 188.0 194.5 201.3 201.5 198.7 193.0 188.4 0.3 7.1 7.1 NRC (Ottawa) -47.3 -58.4 -58.4 -59.1 -63.0 -69.5 -78.9 0.3 5.2 5.2 NRL (Washington DC) 30.3 31.7 32.3 28.7 27.9 26.1 24.9 0.3 5.2 5.3 NTSC (Lintong) -5.0 -3.8 -2.2 -0.4 1.5 0.5 10.6 0.5 5.0 5.0 ONBA (Buenos Aires) -465.3 -472.7 -489.4 -505.5 -509.1 -531.2 -541.4 2.5 5.2 5.8 ONRJ (Rio de Janeiro) -1.3 -0.2 -8.0 -6.7 -1.3 2.7 0.1 1.5 7.0 7.1 OP (Paris) -3.3 -3.6 -3.4 -3.4 -2.7 -2.2 -1.1 0.3 1.9 1.9 ORB (Bruxelles) -4.2 -4.9 -4.9 -4.7 -3.0 -1.2 0.4 0.3 5.2 5.2 PL (Warszawa) 16.3 27.8 35.9 43.7 47.8 59.4 62.2 0.3 5.2 5.2 PTB (Braunschweig) -0.3 -0.5 -0.8 -1.0 -0.5 -0.6 -0.2 0.1 1.6 1.6 ROA (San Fernando) -9.1 -9.1 -9.4 -10.4 -6.0 0.8 6.1 0.3 5.2 5.2 SCL (Hong Kong) -90.4 -89.9 -83.4 -63.4 -48.9 -41.2 -34.9 3.0 10.1 10.5 SG (Singapore) 13.8 10.5 8.0 3.2 -1.0 -5.0 -6.3 0.4 5.2 5.2 SIQ (Ljubljana) -785.8 -816.8 -795.0 -813.0 -836.6 -860.9 -847.3 4.0 20.0 20.4 SMD (Bruxelles) - - - - - - - SMU (Bratislava) -8.4 -2.0 5.9 10.1 27.8 34.2 57.3 2.5 20.0 20.2 SP (Boras) 2.5 0.4 -2.5 -6.0 -6.5 -8.2 -9.7 0.3 1.8 1.9 SU (Moskva) -7.3 -8.2 -9.9 -12.1 -11.1 -11.3 -12.2 1.0 5.2 5.3 TCC (Concepcion) 1895.6 1900.0 1911.1 1939.0 1956.9 1977.8 1999.5 0.3 5.2 5.2 TL (Chung-Li) -2.9 -4.5 -5.1 -4.7 -4.1 -2.6 -3.2 0.3 5.0 5.0 TP (Praha) -39.9 -43.5 -43.9 -43.7 -42.1 -38.2 -27.7 0.3 5.2 5.2 UA (Kharkov) -6.3 -15.3 -16.3 -19.4 -4.5 -3.9 -1.0 1.5 7.1 7.3 UME (Gebze-Kocaeli) 482.8 488.4 492.9 500.4 505.8 517.0 519.5 1.0 7.2 7.2 USNO (Washington DC) -0.5 -1.5 -1.9 -2.3 -2.0 -2.0 -2.2 0.2 3.7 3.8 VMI (Ha Noi) -18.5 -18.0 -8.1 -15.9 -5.7 -3.6 -1.2 1.0 20.1 20.1 VSL (Delft) -13.3 -4.3 0.2 2.2 3.1 3.3 -2.0 0.3 1.9 1.9 ZA (Pretoria) -351.7 -390.7 -435.1 -471.2 -496.7 -543.5 -586.6 1.5 20.1 20.1 - Notes on section 1: (1) BIM : Apparent time step of UTC(BIM) of about +1863 ns near MJD 56336. (2) ESTC : Apparent time step of UTC(ESTC) of -53 ns on MJD 56322.0 due to receiver calibration. (3) NIMB : Apparent time step of UTC(NIMB) of about +755 ns near MJD 56338. (4) NIS : Apparent time step of UTC(NIS) of about +235 ns near MJD 56332. 2 - International Atomic Time TAI and Local atomic time scales TA(k). Computed values of [TAI-TA(k)]. Date 2013 0h UTC JAN 27 FEB 1 FEB 6 FEB 11 FEB 16 FEB 21 FEB 26 MJD 56319 56324 56329 56334 56339 56344 56349 Laboratory k [TAI-TA(k)]/ns CH (Bern-Wabern) 33371.0 33291.2 33207.4 33129.5 33053.2 32972.0 32896.1 F (Paris) 167609.2 167610.0 167609.1 167608.5 167607.5 167607.1 167609.6 JATC (Lintong) -52885.6 -52913.1 -52940.4 -52965.6 -52994.7 -53021.9 -53049.2 KRIS (Daejeon) 43028.8 43052.7 43074.4 43094.9 43117.4 43140.1 43163.8 NICT (Tokyo) 667.0 674.1 684.9 692.8 699.3 706.6 713.6 NIST (Boulder) -45386301.4 -45386492.5 -45386683.6 -45386874.7 -45387064.8 -45387255.8 -45387446.1 NRC (Ottawa) 24110.9 24083.0 24066.4 24048.9 24028.2 24005.4 23978.4 NTSC (Lintong) 15743.3 15773.4 15802.6 15833.3 15861.5 15891.6 15922.2 ONRJ (Rio de Janeiro) -12269.2 -12300.5 -12334.6 -12367.3 -12400.8 -12434.7 -12471.6 PL (Warszawa) -11114.4 -11136.8 -11156.8 -11175.0 -11195.0 -11214.3 -11231.5 PTB (Braunschweig) 2014.1 2014.7 2014.9 2014.0 2014.6 2016.8 2018.7 SG (Singapore) 11692.9 11739.6 11787.2 11832.2 11878.5 11924.2 11972.5 SU (Moskva) 27291043.9 27291043.3 27291041.9 27291039.2 27291039.3 27291038.0 27291035.3 (1) TL (Chung-Li) -333.9 -322.2 -317.1 -315.1 -311.8 -309.1 -301.4 USNO (Washington DC) -35122507.6 -35122796.9 -35123084.7 -35123372.1 -35123660.0 -35123947.5 -35124235.0 - 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 56319 - 56349 6.483x10**-13 (2013 JAN 27 - 2013 FEB 26) New correction 56349 - 56379 6.483x10**-13 (2013 FEB 26 - 2013 MAR 28) New correction foreseen 56379 - 56409 6.483x10**-13 (2013 MAR 28 - 2013 APR 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 1.0x10**-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 Frequency Standards (PFS). In this table: uA is the uncertainty originating in the instability of the PFS, uB is the combined uncertainty from systematic effects, ul/lab is the uncertainty in the link between the PFS 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 references. 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 Frequency Standards that explain changes in uncertainties. 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 Ref(uB) uB(Ref) Note Estimation PTB-CS1 56319 56349 -8.58 6.00 8.00 0.00 0.07 10.00 T148 8. (1) PTB-CS2 56319 56349 -7.31 3.00 12.00 0.00 0.07 12.37 T148 12. (1) NIST-F1 56304 56329 0.59 0.27 0.31 0.15 0.23 0.49 T214 0.35 (2) NPL-CsF2 56319 56349 0.39 0.21 0.23 0.08 0.20 0.38 T284 0.23 (3) SYRTE-FO1 56319 56344 -0.28 0.20 0.36 0.12 0.23 0.49 T301 0.37 (4) SYRTE-FO2 56319 56349 -0.05 0.25 0.24 0.12 0.20 0.42 T301 0.23 (4) PTB-CSF2 56304 56324 -0.21 0.17 0.34 0.02 0.09 0.39 T287 0.41 (5) Notes: (1) Continuously operating as a clock participating to TAI (2) Report 14 FEB. 2013 by NIST (3) Report 05 MAR. 2013 by NPL (4) Report 04 MAR. 2013 by LNE-SYRTE (5) Report 28 FEB. 2013 by PTB The second table gives the BIPM estimate of d, based on all available PFS measurements over the period MJD 55959-56349, 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 56319-56349 0.1x10**-15 0.2x10**-15 (2013 JAN 27 - 2013 FEB 26) In the third table, d is obtained on the given periods of estimation by comparison of the TAI frequency with that of the given individual Secondary Frequency Standards (SFS). This table is organized similarly to the first table, with the addition of uSrep which represents the recommended uncertainty of the secondary representation of the second and of Ref(uS) which provides the reference for the frequency of the transition and its uncertainty uSrep. All values are expressed in 10**-15 and are valid only for the stated period of estimation. Note that SFS are not used for the estimation of d provided in the second table above, nor for determining the steering correction reported in section 3. Standard    Period of     d     uA     uB  ul/Lab ul/Tai     u    uSrep Ref(uS) Ref(uB) uB(Ref) Note             Estimation SYRTE-FORb 56319 56349 -1.78 0.20 0.31 0.10 0.20 0.43 3.00 [1] T301 0.35 (1) [1] CIPM Recommendation 1 (CI-2006) “Concerning secondary representations of the second” in Procès-Verbaux des Séances du Comité International des Poids et Mesures, 96th meeting (2006), 2007, 258 p. -Note : (1) Report 04 MAR. 2013 by LNE-SYRTE 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= 1.1 ns, S0'= 1.2 ns, S1= 6.9 ns, S1'= 6.9 ns 2013 0h UTC MJD C0/ns N0 C0'/ns N0' C1/ns N1 C1'/ns N1' JAN 27 56319 1.1 85 -2.0 85 -161.8 85 -318.0 86 JAN 28 56320 1.5 89 -1.1 89 -164.7 88 -322.7 88 JAN 29 56321 1.3 90 -1.2 90 -165.2 81 -325.6 84 JAN 30 56322 -0.6 89 -2.6 89 -162.3 85 -325.8 85 JAN 31 56323 -3.2 89 -3.1 89 -160.2 88 -325.9 89 FEB 1 56324 -4.0 89 -1.9 89 -160.1 89 -327.4 89 FEB 2 56325 -4.7 90 -1.8 90 -157.4 87 -326.5 87 FEB 3 56326 -6.3 89 -1.2 88 -151.9 88 -322.9 87 FEB 4 56327 -6.5 89 -1.9 89 -147.6 82 -320.4 82 FEB 5 56328 -7.6 89 -2.3 89 -144.7 86 -320.2 85 FEB 6 56329 -7.5 90 -2.1 90 -143.0 90 -321.2 90 FEB 7 56330 -7.3 89 -1.8 89 -148.0 89 -327.4 88 FEB 8 56331 -6.4 89 -0.8 87 -153.3 87 -333.2 87 FEB 9 56332 -5.7 89 -2.5 89 -154.5 89 -334.8 88 FEB 10 56333 -5.1 90 -1.7 90 -153.5 90 -334.6 90 FEB 11 56334 -4.3 89 -1.3 89 -152.1 89 -333.9 89 FEB 12 56335 -3.2 89 -2.5 89 -147.4 89 -329.2 88 FEB 13 56336 -1.9 89 -1.8 89 -142.9 81 -323.8 81 FEB 14 56337 -0.1 89 -0.1 90 -141.4 87 -321.2 88 FEB 15 56338 -0.5 86 -1.9 86 -140.5 85 -319.7 85 FEB 16 56339 -1.7 89 -2.6 87 -139.3 86 -317.3 86 FEB 17 56340 -0.3 89 0.0 88 -137.1 86 -313.3 83 FEB 18 56341 -0.4 90 -1.6 90 -135.8 90 -310.3 90 FEB 19 56342 -0.2 89 -1.3 89 -138.4 85 -310.0 86 FEB 20 56343 0.3 89 -1.6 89 -142.3 84 -310.8 85 FEB 21 56344 -0.1 89 -2.1 89 -146.3 83 -311.9 83 FEB 22 56345 -1.1 89 -2.1 89 -148.6 89 -311.4 89 FEB 23 56346 -2.6 89 -2.3 89 -151.6 88 -311.4 89 FEB 24 56347 -2.5 89 -2.4 83 -154.9 85 -312.2 85 FEB 25 56348 -1.7 89 -3.4 86 -157.3 74 -312.9 74 FEB 26 56349 -2.5 90 -2.2 90 -160.1 90 -315.1 90 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 NA 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 GPS P3 0.7 5.0 GPS EC/GPS EC 2007 Feb/2004 Aug 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 NA ESTC/PTB GPS P3 0.7 20.0 NA /GPS EC NA /2004 Aug HKO /PTB GPS MC 2.5 5.0 GPS EC/GPS EC 2004 Sep/2006 Sep 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 GPS P3 0.7 20.0 NA /GPS EC NA /2004 Aug Link Type uA/ns uB/ns Calibration Type Calibration Dates INTI/PTB GPS MC 4.0 20.0 NA /GPS EC NA /2006 Sep INXE/PTB GPSPPP 0.3 20.0 NA /GPS EC NA /2006 Sep IPQ /PTB NA 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 GPSGLN 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 NA 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 8.0 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 TWSTFT 0.3 5.0 LC(GPS P3) 2012 Oct NIMB/PTB GPS MC 2.0 20.0 NA /GPS EC NA /2006 Sep NIMT/PTB GPS P3 1.0 20.0 NA /GPS EC NA /2004 Aug NIS /PTB GPS P3 0.8 7.0 LC(GPS MC) 2010 Jun NIST/PTB TWGPPP 0.3 5.0 LC(TWSTFT)/BC(GPS PPP) 2005 May/2009 Aug NMIJ/PTB GPSPPP 0.4 5.0 GPS EC/GPS EC 2002 Apr/2004 Aug NMLS/PTB GPS MC 1.5 20.0 NA /GPS EC NA /2006 Sep NPL /PTB TWGPPP 0.3 5.0 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 GPSPPP 0.3 5.0 GPS EC/GPS EC 2002 May/2004 Aug NTSC/PTB TWSTFT 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 1.5 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 2003 Jul/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 SCL /PTB GPS MC 3.0 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 NA 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 GPSGLN 1.0 5.0 LC(GPS MC) 2009 May 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 GPSGLN 1.0 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 GPS P3 1.0 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