CIRCULAR T 297 ISSN 1143-1393 2012 OCTOBER 10, 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 2012 0h UTC AUG 30 SEP 4 SEP 9 SEP 14 SEP 19 SEP 24 SEP 29 Uncertainty/ns Notes MJD 56169 56174 56179 56184 56189 56194 56199 uA uB u Laboratory k [UTC-UTC(k)]/ns AOS (Borowiec) 0.7 2.1 4.7 4.6 5.2 4.1 3.9 0.3 5.2 5.2 APL (Laurel) -3.8 -6.1 -7.3 -8.4 -2.5 -3.3 -4.1 0.3 5.2 5.2 AUS (Sydney) 465.6 480.8 480.6 473.4 467.4 470.7 458.6 0.3 5.2 5.2 BEV (Wien) 51.1 56.8 56.6 60.0 60.6 46.8 37.2 0.3 3.4 3.4 BIM (Sofiya) 1645.2 1664.0 1657.8 1661.0 1656.9 1676.0 1695.1 1.5 7.2 7.3 BIRM (Beijing) -497.0 -436.8 -385.6 -321.9 -265.6 -208.9 -148.2 1.5 20.1 20.1 BY (Minsk) 34.1 35.2 36.8 35.0 37.7 41.5 44.7 1.5 7.2 7.3 CAO (Cagliari) - - - - - - - CH (Bern) 23.4 19.4 17.7 12.2 6.7 0.6 -2.2 0.3 1.8 1.9 CNM (Queretaro) -12.2 -10.2 -7.4 -4.2 -12.3 -12.5 -8.6 2.0 5.2 5.6 CNMP (Panama) -15.6 -14.7 -11.3 -7.9 -1.7 2.0 11.6 3.5 5.2 6.2 DLR (Oberpfaffenhofen) 45.9 37.3 27.3 5.1 -6.6 -11.5 -15.4 0.3 5.2 5.2 DMDM (Belgrade) 14.1 9.4 13.6 15.9 20.3 27.3 25.1 0.3 7.1 7.1 DTAG (Frankfurt/M) 197.8 204.6 207.0 207.8 222.5 228.2 236.3 0.3 10.1 10.1 EIM (Thessaloniki) - - - - - - - HKO (Hong Kong) 437.6 443.2 457.7 460.4 468.2 485.2 500.2 2.5 5.2 5.8 IFAG (Wettzell) -619.0 -612.0 -607.6 -607.0 -604.2 -612.0 -603.6 0.3 5.2 5.2 IGNA (Buenos Aires) 8940.0 9016.7 9074.8 9145.9 9212.9 9274.4 9338.0 2.0 5.2 5.6 INPL (Jerusalem) 63.0 54.3 46.0 39.7 34.0 31.3 31.9 1.0 20.1 20.1 INTI (Buenos Aires) -52.7 -20.7 21.3 48.5 62.0 64.3 69.2 4.0 20.1 20.5 INXE (Rio de Janeiro) - - - 16.8 12.4 6.4 -5.2 1.0 20.1 20.1 (1) IPQ (Caparica) -2.9 5.5 -5.0 -0.9 1.3 -6.1 -3.9 0.4 7.2 7.2 IT (Torino) 17.5 19.8 20.3 19.4 18.2 15.7 13.8 0.3 2.0 2.0 JATC (Lintong) -6.9 8.2 14.2 13.4 0.9 4.9 -0.8 0.5 5.1 5.1 JV (Kjeller) 158.9 187.0 189.9 191.9 288.9 214.4 212.5 5.0 20.0 20.6 KEBS (Nairobi) 13048.7 13157.2 13254.7 13349.2 13455.2 13549.2 13647.8 1.5 20.1 20.1 KIM (Serpong-Tangerang) 94.3 127.3 133.9 141.3 128.1 146.1 148.3 2.0 20.0 20.1 KRIS (Daejeon) 2.8 3.3 4.7 5.5 7.1 7.0 7.6 0.3 5.1 5.1 KZ (Astana) -175.7 -160.6 -156.5 -169.3 -203.2 -193.9 -191.0 2.5 20.0 20.2 LT (Vilnius) 117.5 125.7 144.8 157.9 179.6 188.0 194.0 2.0 5.2 5.6 Date 2012 0h UTC AUG 30 SEP 4 SEP 9 SEP 14 SEP 19 SEP 24 SEP 29 Uncertainty/ns Notes MJD 56169 56174 56179 56184 56189 56194 56199 uA uB u Laboratory k [UTC-UTC(k)]/ns MIKE (Espoo) 4.7 5.5 6.8 7.0 7.7 6.6 6.5 0.3 7.2 7.2 MKEH (Budapest) -70265.8 -70473.6 -70676.0 -70906.0 -71114.2 -71326.0 -71547.1 1.5 20.0 20.1 MSL (Lower Hutt) -258.7 -265.9 -275.0 -290.0 -320.0 -331.2 -312.9 1.5 20.1 20.1 NAO (Mizusawa) 162.3 163.8 165.5 169.9 176.9 172.6 168.6 2.0 19.8 19.9 NICT (Tokyo) 11.3 10.9 11.3 13.2 16.1 16.6 18.1 0.3 4.6 4.6 NIM (Beijing) 5.7 5.6 4.9 5.0 6.3 5.9 7.2 0.7 5.2 5.2 NIMB (Bucharest) 23.1 36.0 70.3 85.8 102.3 108.2 106.5 2.0 20.1 20.2 NIMT (Pathumthani) -14.2 -14.5 -3.8 4.3 7.5 14.3 25.2 1.0 20.0 20.0 NIS (Cairo) -982.1 -988.4 -992.7 -995.9 -997.8 -999.1 -1003.9 0.8 7.1 7.2 NIST (Boulder) 2.8 2.8 3.3 2.9 3.9 3.0 2.9 0.3 5.1 5.1 NMIJ (Tsukuba) 2.5 5.3 9.7 10.6 10.3 9.0 8.3 0.4 5.2 5.2 NMLS (Sepang) -843.7 -824.5 -795.6 -771.6 -740.6 -723.1 -707.0 1.5 20.1 20.1 NPL (Teddington) 6.5 3.9 2.1 -0.1 -1.2 -3.3 -4.5 0.3 5.2 5.2 NPLI (New-Delhi) 190.7 189.4 190.2 190.0 190.1 189.2 189.0 0.3 7.2 7.2 NRC (Ottawa) 16.0 11.2 15.9 9.5 9.3 8.2 2.6 0.3 5.2 5.2 NRL (Washington DC) -2.0 46.0 173.7 244.6 264.3 249.3 214.4 0.3 5.2 5.2 NTSC (Lintong) 8.6 6.4 7.7 7.7 1.3 4.6 7.8 0.5 5.0 5.0 ONBA (Buenos Aires) - -125.1 -146.6 -152.2 -175.6 -195.1 -205.6 2.5 5.2 5.8 ONRJ (Rio de Janeiro) 2.1 8.1 9.4 1.9 3.1 13.6 3.7 3.9 7.1 8.1 OP (Paris) 18.8 16.8 27.9 27.2 29.2 31.1 35.0 0.3 1.9 1.9 ORB (Bruxelles) 16.0 16.1 15.1 12.2 6.5 1.9 0.0 0.3 5.2 5.2 PL (Warszawa) 68.7 73.5 68.7 62.3 54.5 44.5 38.1 0.3 5.1 5.1 PTB (Braunschweig) 1.9 1.6 2.5 2.3 2.5 1.4 1.6 0.1 1.6 1.6 ROA (San Fernando) 1.1 4.2 6.3 6.6 6.9 5.8 5.6 0.3 5.1 5.2 SCL (Hong Kong) -47.6 -45.0 -38.4 -41.3 -37.3 -46.1 -42.3 3.0 10.1 10.6 SG (Singapore) 1.1 12.4 27.9 33.9 42.1 51.3 50.3 0.4 5.2 5.3 SIQ (Ljubljana) -595.5 -595.7 -579.0 -611.5 -574.4 -594.1 -603.4 4.0 20.0 20.4 SMD (Bruxelles) 28.0 -3.0 21.9 -0.5 1.1 -3.0 3.5 1.5 20.1 20.1 (2) SMU (Bratislava) -44.8 -45.6 -63.5 -68.1 -69.4 -76.9 -76.3 2.5 20.0 20.2 SP (Boras) -3.9 -3.5 -2.6 -3.4 -2.3 -2.3 -0.6 0.3 1.8 1.9 SU (Moskva) 3.2 3.5 2.8 2.5 2.1 1.7 1.5 1.0 5.2 5.3 TCC (Concepcion) 1425.0 1427.3 1441.9 1464.9 1485.5 1508.3 1528.1 0.3 5.2 5.2 TL (Chung-Li) 10.4 9.5 9.8 9.4 9.3 7.0 4.2 0.3 5.0 5.0 TP (Praha) -2.0 -4.5 -4.8 -8.2 -15.9 -19.8 -22.7 0.3 5.2 5.2 UA (Kharkov) 1.9 15.5 19.8 24.5 27.3 34.8 42.9 1.5 7.1 7.3 UME (Gebze-Kocaeli) 280.7 276.6 276.6 287.3 291.1 297.6 315.3 1.0 7.0 7.1 USNO (Washington DC) 7.5 7.3 7.3 6.8 7.2 5.8 5.7 0.2 3.8 3.8 VMI (Ha Noi) 0.9 8.8 18.5 19.8 13.0 -3.9 -15.3 1.0 20.1 20.1 VSL (Delft) 6.3 12.0 18.5 15.6 12.9 11.8 5.8 0.3 1.8 1.9 ZA (Pretoria) 747.1 714.5 676.3 626.1 586.4 556.5 516.5 1.5 19.9 19.9 - Notes on section 1: (1) INXE : INMETRO - National Institute for Metrology and Technology - Time and Frequency Laboratory, Rio de Janeiro, Brazil. (2) SMD : Apparent time step of UC(SMD) of +25ns on MJD 56180.03. 2 - International Atomic Time TAI and Local atomic time scales TA(k). Computed values of [TAI-TA(k)]. Date 2012 0h UTC AUG 30 SEP 4 SEP 9 SEP 14 SEP 19 SEP 24 SEP 29 MJD 56169 56174 56179 56184 56189 56194 56199 Laboratory k [TAI-TA(k)]/ns CH (Bern) 35662.3 35588.4 35516.1 35439.6 35364.3 35288.1 35213.2 F (Paris) 167604.2 167604.3 167605.9 167602.9 167604.9 167602.8 167604.0 JATC (Lintong) -52047.4 -52061.8 -52090.8 -52118.3 -52150.0 -52169.7 -52196.8 KRIS (Daejeon) 41806.0 41851.8 41898.7 41944.9 41991.3 42035.7 42080.3 NICT (Tokyo) 366.5 374.1 384.2 395.3 406.4 415.9 428.8 NIST (Boulder) -45380623.2 -45380811.7 -45380999.7 -45381188.6 -45381376.1 -45381565.5 -45381754.1 NRC (Ottawa) 24678.4 24655.3 24643.0 24619.8 24602.7 24584.7 24562.5 NTSC (Lintong) 14840.5 14871.1 14899.6 14930.5 14955.8 14995.1 15027.5 ONRJ (Rio de Janeiro) -11641.8 -11667.3 -11693.2 -11720.3 -11749.3 -11776.6 -11810.2 PL (Warszawa) -10554.2 -10566.1 -10577.9 -10591.3 -10605.3 -10619.3 -10634.8 PTB (Braunschweig) 2019.0 2018.9 2019.1 2018.1 2018.7 2017.4 2017.8 SG (Singapore) 10286.5 10332.9 10382.3 10423.3 10466.4 10515.2 10553.3 SU (Moskva) 27287363.1 27287515.0 27287666.1 27287817.9 27287969.6 27288121.2 27288273.3 (1) TL (Chung-Li) -482.5 -480.1 -473.4 -469.1 -463.3 -459.6 -453.5 USNO (Washington DC) -35113875.3 -35114163.6 -35114452.0 -35114740.6 -35115027.6 -35115316.1 -35115603.8 - 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 56169 - 56199 6.486x10**-13 (2012 AUG 30 - 2012 SEP 29) New correction 56199 - 56229 6.483x10**-13 (2012 SEP 29 - 2012 OCT 29) New correction foreseen 56229 - 56259 6.483x10**-13 (2012 OCT 29 - 2012 NOV 28) 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 56169 56199 -10.67 6.00 8.00 0.00 0.07 10.00 T148 8. (1) PTB-CS2 56169 56199 -2.61 3.00 12.00 0.00 0.07 12.37 T148 12. (1) NIST-F1 56134 56159 0.81 0.29 0.31 0.14 0.23 0.50 T214 0.35 (2) SYRTE-FO1 56169 56199 0.18 0.40 0.43 0.10 0.20 0.63 T227 0.72 (3) SYRTE-FO2 56174 56199 0.00 0.40 0.26 0.10 0.23 0.54 T227 0.65 (3) PTB-CSF1 56169 56199 0.99 0.22 0.74 0.01 0.07 0.77 T162 1.40 (4) Notes: (1) Continuously operating as a clock participating to TAI (2) Report 29 AUG. 2012 by NIST (3) Report 03 OCT. 2012 by LNE-SYRTE (4) Report 02 OCT. 2012 by PTB 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 56169 56199 -1.49 0.30 0.32 0.10 0.20 0.49 3.00   [1]     T295    0.45   (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 SEP. 2012 by LNE-SYRTE The second table gives the BIPM estimate of d, based on all available PFS measurements over the period MJD 55809-56199, 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 56169-56199 0.2x10**-15 0.3x10**-15 (2012 AUG 30 - 2012 SEP 29) 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'= 1.1 ns, S1= 6.4 ns, S1'= 6.3 ns 2012 0h UTC MJD C0/ns N0 C0'/ns N0' C1/ns N1 C1'/ns N1' AUG 30 56169 6.5 89 8.1 89 -205.0 86 -435.7 86 AUG 31 56170 8.3 90 8.5 89 -200.4 90 -431.6 90 SEP 1 56171 9.8 88 8.2 88 -195.7 79 -426.8 81 SEP 2 56172 11.2 88 8.7 88 -195.9 86 -426.1 87 SEP 3 56173 10.3 87 6.7 77 -196.5 89 -425.3 89 SEP 4 56174 10.6 87 5.5 88 -192.5 81 -419.8 80 SEP 5 56175 12.9 88 8.2 89 -190.2 87 -416.0 87 SEP 6 56176 14.9 89 10.3 89 -190.2 89 -414.1 89 SEP 7 56177 10.8 89 7.6 89 -189.1 82 -410.7 81 SEP 8 56178 7.3 90 6.5 90 -188.0 89 -406.9 89 SEP 9 56179 6.4 88 7.6 88 -186.9 84 -402.0 84 SEP 10 56180 5.5 89 7.8 89 -181.9 88 -393.1 88 SEP 11 56181 4.5 89 8.0 89 -175.5 89 -383.7 89 SEP 12 56182 3.6 90 7.1 89 -170.5 90 -376.1 90 SEP 13 56183 3.5 89 5.3 89 -164.5 89 -367.8 89 SEP 14 56184 5.0 89 7.8 89 -160.8 88 -360.7 89 SEP 15 56185 5.3 88 6.4 88 -161.9 89 -358.0 88 SEP 16 56186 6.3 90 5.1 89 -163.2 90 -356.2 90 SEP 17 56187 7.8 89 8.4 89 -162.8 88 -353.3 88 SEP 18 56188 5.7 89 6.0 89 -161.4 81 -349.9 82 SEP 19 56189 7.7 89 6.0 89 -160.0 89 -347.2 89 SEP 20 56190 10.3 90 7.8 90 -162.1 90 -348.1 90 SEP 21 56191 9.7 87 8.4 89 -162.7 89 -347.5 89 SEP 22 56192 8.7 89 10.0 88 -159.6 89 -343.5 89 SEP 23 56193 7.5 86 6.9 86 -158.4 89 -341.2 89 SEP 24 56194 6.9 90 6.2 90 -155.8 90 -337.5 90 SEP 25 56195 8.1 89 8.1 89 -152.1 88 -333.6 86 SEP 26 56196 7.5 89 8.2 89 -149.9 84 -332.2 84 SEP 27 56197 4.4 89 5.2 89 -150.1 89 -332.5 89 SEP 28 56198 3.2 90 4.7 90 -150.3 90 -332.5 90 SEP 29 56199 3.0 89 4.0 89 -148.7 89 -330.7 89 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 GPSPPP 0.3 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 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 GPSGLN 1.0 20.0 NA /GPS EC NA /2004 Aug INTI/PTB GPS MC 4.0 20.0 NA /GPS EC NA /2006 Sep Link Type uA/ns uB/ns Calibration Type Calibration Dates INXE/PTB GPS P3 1.0 20.0 NA /GPS EC NA /2006 Sep IPQ /PTB TWGPPP 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 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 GPS P3 0.7 5.0 GPS EC/GPS EC 2009 Dec/2004 Aug 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 MC 4.0 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 GPS MC 1.5 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 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