CIRCULAR T 400 ISSN 1143-1393
2021 MAY 11, 07h UTC
BUREAU INTERNATIONAL DES POIDS ET MESURES
THE INTERGOVERNMENTAL ORGANIZATION ESTABLISHED BY THE METRE CONVENTION
PAVILLON DE BRETEUIL F-92312 SEVRES CEDEX TEL. +33 1 45 07 70 70 tai@bipm.org

The contents of the sections of BIPM Circular T are fully described in the document " Explanatory supplement to BIPM Circular T "
available at https://webtai.bipm.org/ftp/pub/tai/other-products/notes/explanatory_supplement_v0.4.pdf

1 - Difference between UTC and its local realizations UTC(k) and corresponding uncertainties. From 2017 January 1, 0h UTC, TAI-UTC = 37 s.
Date 2021 0h UTC MAR 31 APR 5 APR 10 APR 15 APR 20 APR 25 APR 30 Uncertainty/ns Notes
MJD 59304 59309 59314 59319 59324 59329 59334 uA uB u
Laboratory k [UTC-UTC(k)]/ns
AOS (Borowiec) -1.5 -1.8 -1.8 -2.1 -2.2 -2.4 -2.4 0.3 2.9 2.9
APL (Laurel) -0.9 -1.0 -0.4 -0.2 0.1 0.5 0.9 0.3 19.6 19.6
AUS (Sydney) -472.8 -476.6 -468.6 -476.5 -474.9 -491.6 -498.3 0.3 11.2 11.2
BEV (Wien) 11.4 16.1 16.7 14.2 9.6 6.5 11.2 0.3 3.3 3.3
BFKH (Budapest) - - 2401.8 2425.2 2457.7 2482.7 - 1.5 20.0 20.1
BIM (Sofiya) 14443.4 14468.8 14474.6 14496.2 14532.1 14575.1 14585.9 0.7 7.1 7.2
BIRM (Beijing) -7.7 -10.0 -8.3 -9.7 -8.0 -6.9 -3.6 0.7 2.8 2.9
BOM (Skopje) -4388.2 -4398.2 -4414.0 -4419.2 -4413.9 -4410.2 - 5.0 7.5 9.1
BY (Minsk) 0.1 0.7 0.9 0.6 0.8 1.2 1.1 1.5 12.1 12.2
CAO (Cagliari) -26534.0 -26647.1 -26755.3 -26863.4 -26975.3 -27080.6 -27196.8 1.5 20.0 20.1
CH (Bern-Wabern) 0.0 0.2 -0.4 -0.9 -0.4 0.4 0.8 0.3 1.3 1.3
CNES (Toulouse) 4.6 4.9 5.4 5.9 5.4 4.3 4.1 0.7 2.9 3.0
CNM (Queretaro) -6.0 0.0 3.9 5.8 -2.9 9.4 -0.1 4.0 11.2 11.9
CNMP (Panama) -11.1 12.2 16.5 12.4 - 18.0 13.5 0.7 7.4 7.5
DFNT (Tunis) 5134.6 5384.2 5640.0 5885.9 6109.4 6360.1 6615.9 0.7 20.0 20.0
DLR (Oberpfaffenhofen) - - - - - - -
DMDM (Belgrade) 1.1 -5.4 -13.7 -13.3 -14.7 -20.4 -22.0 0.3 3.4 3.4
DTAG (Frankfurt/M) -6.0 -11.6 -13.6 -11.8 -16.0 -4.6 -1.5 0.3 2.9 2.9
EIM (Thessaloniki) 8.1 1.4 12.5 -2.3 4.9 3.1 6.4 4.0 11.2 11.9
ESTC (Noordwijk) -0.1 0.1 0.7 0.9 0.5 -0.5 -0.2 0.3 2.8 2.8
HKO (Hong Kong) - - - - - - -
ICE (San Jose) 65.7 65.0 59.0 58.5 53.6 54.7 62.2 2.5 20.0 20.2
IDN (Serpong-Tangerang) 238.8 245.9 283.8 309.2 336.7 366.8 374.2 0.3 2.8 2.8
IFAG (Wettzell) -828.4 -829.9 -823.5 -818.5 -818.6 -820.9 -821.7 0.3 2.8 2.8
IGNA (Buenos Aires) - - - - - - -
IMBH (Sarajevo) -1.1 2.7 0.8 -0.1 1.2 2.9 1.2 0.7 2.8 2.9
INCP (Lima) -204.8 -201.7 -201.5 -208.3 -209.8 -200.6 -196.3 5.0 20.0 20.6
INM (Bogota D.C.) -2.6 - 178.0 179.3 175.1 169.8 157.5 1.5 20.0 20.1 (1)
INPL (Jerusalem) -72.4 -77.7 -78.5 -84.9 -92.0 50.2 42.7 0.3 7.3 7.3 (2)
INTI (Buenos Aires) -6.2 -14.7 -23.1 -19.3 -16.6 -9.2 -37.8 0.3 20.0 20.0
INXE (Rio de Janeiro) 8.9 2.2 2.5 -42.1 -49.3 -63.7 -75.0 0.3 2.8 2.8 (3)
IPQ (Caparica) 331.8 333.6 332.4 - 342.5 351.4 353.3 0.5 20.0 20.0
IT (Torino) -1.3 -0.7 -0.5 -0.7 -0.6 0.0 1.1 0.3 1.3 1.4
JATC (Lintong) 2.0 2.0 1.8 2.1 2.4 2.2 3.0 0.3 2.9 2.9
JV (Kjeller) 4.8 -3.9 -3.1 -21.2 -19.9 -12.4 -2.3 0.3 4.3 4.3
KRIS (Daejeon) 3.8 3.4 2.9 3.0 2.7 2.2 1.5 0.3 3.2 3.2
LRTE (Sao Carlos) 10.5 11.8 7.0 2.8 -1.1 -5.6 -11.0 0.3 20.0 20.0
LT (Vilnius) 811.6 808.9 820.5 806.8 790.8 800.6 791.3 0.3 2.9 2.9
LUX (Belvaux) 7.9 8.8 -1.8 -5.3 -5.3 -1.8 7.0 0.3 3.0 3.0
LV (Riga) -353.0 -357.8 -363.4 -358.9 -368.5 -371.8 -372.4 1.5 12.2 12.3
MASM (Bayanzurkh) -764.0 -761.1 -755.7 -750.7 -740.5 -723.9 -715.3 0.4 2.9 2.9
MBM (Podgorica) 1546.8 1573.8 1596.4 1629.3 202.5 202.1 197.0 1.5 20.0 20.1 (4)
MIKE (Espoo) 2.3 2.6 2.7 2.6 2.5 2.5 2.2 0.3 2.7 2.7
MSL (Lower Hutt) -3.1 16.7 5.7 -12.1 -25.2 -6.4 9.0 1.5 20.0 20.1
NAO (Mizusawa) 292.8 294.5 298.0 299.6 307.8 305.3 305.4 2.0 20.0 20.1
NICT (Tokyo) -9.7 -14.6 -16.2 -13.7 -11.9 -10.5 -8.7 0.3 2.1 2.1 (5)
NIM (Beijing) 1.5 1.6 1.7 2.0 1.7 1.6 1.4 0.3 2.1 2.1
NIMB (Bucharest) -3007.8 -2579.9 -2158.9 -1735.2 -1311.5 -890.7 -459.0 0.3 7.4 7.5
NIMT (Pathumthani) - - 111.4 107.8 102.5 100.0 98.1 0.7 20.0 20.0
NIS (Cairo) - - - -12.7 -12.1 -10.7 -14.7 0.7 20.0 20.0
NIST (Boulder) 0.8 0.7 0.3 0.2 0.6 1.1 1.9 0.3 2.2 2.2
NMIJ (Tsukuba) -0.8 -0.7 0.7 1.9 0.7 -0.9 -2.2 0.3 3.3 3.3
NMLS (Sepang) -1201.2 -1195.5 -1187.1 -1183.7 -1164.6 -1148.3 -1136.5 1.5 3.4 3.7
NPL (Teddington) 0.3 0.7 0.0 1.3 -1.8 -1.1 -0.9 0.3 1.3 1.3 (6)
NPLI (New-Delhi) 1.3 1.1 1.0 0.9 0.9 0.9 1.0 0.3 2.9 2.9
NRC (Ottawa) 13.4 14.4 15.8 17.3 18.8 18.8 19.0 0.3 3.1 3.1
NRL (Washington DC) 5.1 4.0 4.2 -2.8 -4.4 -0.9 4.0 0.3 19.7 19.7
NSAI (Dublin) -241.4 -243.9 -245.7 -247.8 -254.7 -250.4 -260.7 0.4 7.1 7.2
NTSC (Lintong) 1.5 1.3 1.4 2.1 2.1 2.8 3.7 0.3 2.6 2.6
ONBA (Buenos Aires) 1012.1 1013.2 1024.8 1024.0 1054.8 1073.3 1054.9 2.0 11.2 11.4
ONRJ (Rio de Janeiro) -1.8 4.2 1.1 0.8 6.4 5.1 -1.7 0.4 20.0 20.0
OP (Paris) 0.1 0.2 -0.2 -0.3 -0.1 0.0 0.1 0.3 1.3 1.3
ORB (Bruxelles) 1.7 2.2 2.4 2.2 2.4 2.5 2.9 0.3 2.8 2.8
PL (Warszawa) 7.7 7.1 6.3 5.7 5.4 5.3 5.1 0.4 2.8 2.9
PTB (Braunschweig) 0.9 0.9 0.7 0.5 0.3 0.2 0.1 0.1 0.8 0.8
ROA (San Fernando) -0.9 -0.6 -0.4 -1.0 -1.0 -2.8 -3.5 0.3 1.4 1.4
SASO (Riyadh) -2146.0 -2154.5 -2162.8 -2182.8 -2196.2 -2206.4 -2220.2 0.7 3.1 3.2
SCL (Hong Kong) 55.4 54.8 49.9 37.1 24.3 22.2 16.0 0.3 3.0 3.0
SG (Singapore) 1.1 -8.4 -10.7 -9.0 -10.9 -3.2 1.2 0.3 2.8 2.8
SIQ (Ljubljana) 496.4 501.3 517.8 532.0 554.3 543.8 557.9 0.3 3.7 3.7
SL (Colombo) - 36.3 36.6 45.2 41.3 41.0 41.4 0.3 2.8 2.8
SMD (Bruxelles) -5.2 -9.4 -8.0 -7.5 -4.5 -0.6 -6.6 0.3 3.2 3.2
SMU (Bratislava) 115.6 114.7 115.7 108.9 108.1 90.8 76.4 1.5 12.2 12.3
SP (Boras) 1.6 1.9 2.0 1.9 1.9 1.7 1.4 0.3 1.3 1.3
SU (Moskva) 2.7 2.7 2.5 2.5 2.4 2.3 2.2 0.3 2.1 2.1
TL (Chung-Li) 0.7 2.8 3.8 4.4 4.2 3.9 3.2 0.3 2.1 2.2 (7)
TP (Praha) 10.6 9.3 5.8 -10.1 -17.7 -19.0 -22.1 0.3 2.8 2.8
UA (Kharkov) 10.2 5.4 1.1 14.7 6.2 -10.6 3.2 3.0 7.1 7.7
UAE (Abu Dhabi) 8.1 12.9 16.3 17.0 14.7 20.9 13.5 4.0 7.6 8.6
UME (Gebze-Kocaeli) -1.4 2.3 5.1 7.1 10.3 12.3 15.8 0.3 3.4 3.4
USNO (Washington DC) -0.1 0.3 0.2 0.3 0.9 1.4 0.6 0.2 1.4 1.4
VMI (Ha Noi) 2.3 12.3 41.1 33.0 25.4 21.4 14.6 0.4 7.1 7.2 (8)
VSL (Delft) -2.2 0.8 1.3 3.5 4.9 4.2 -1.5 0.3 1.3 1.3
ZA (Pretoria) -5.5 -2.9 1.8 1.9 -0.1 -1.2 1.7 0.3 2.9 2.9
- Note on section 1:
(1) INM : Time step of UTC(INM) of -190 ns on MJD 59309 due to set up change.
(2) INPL : Time step of UTC(INPL) of -150 ns on MJD 59324.28.
(3) INXE : Time step of UTC(INXE) of +48.2 ns on MJD 59318 due to calibration.
(4) MBM : Apparent time step of UTC(MBM) of +1436 ns on MJD 59320.5.
(5) NICT : Time step of UTC(NICT) of -0.7 ns on MJD 59311 due to calibration.
(6) NPL : Time step of UTC(NPL) of +2.3 ns on MJD 59305 due to calibration.
(7) TL : Time step of UTC(TL) of -1.5 ns on MJD 59309 due to erroneous calibration introduction on MJD 59270.
(8) VMI : Apparent time step of UTC(VMI) of about -20 ns on MJD 59310.08.

2 - Difference between the normalized frequencies of EAL and TAI.
Interval of validity f(EAL)-f(TAI)
Steering correction 59304 - 59334 6.501x10-13 (2021 MAR 31 - 2021 APR 30)
New correction 59334 - 59364 6.501x10-13 (2021 APR 30 - 2021 MAY 30)
New correction foreseen 59364 - 59394 6.501x10-13 (2021 MAY 30 - 2021 JUN 29)

3 - Duration of the TAI scale interval d.

Table 1: Estimate of d by individual PSFS measurements and corresponding uncertainty.
All values are expressed in 10-15 and are valid only for the stated period of estimation.
Standard Period of d uA uB uA/Lab uB/Lab ul/Tai u uSrep Ref(uS) Ref(uB) uB(Ref) Uptime LastRep Nrep3y Steer Note
Estimation %
PTB-CS1 59304 59334 -9.25 8.00 8.00 0.00 0.00 0.07 11.31 PFS/NA T148 8.00 100.0 T399 36 Y (1)
PTB-CS2 59304 59334 -8.56 5.00 12.00 0.00 0.00 0.07 13.00 PFS/NA T148 12.00 100.0 T399 35 Y (1)
IT-CsF2 59304 59329 -0.72 0.23 0.32 0.10 0.01 0.23 0.47 PFS/NA T318 0.19 96.2 T399 14 Y (2)
NPL-CsF2 59304 59334 0.69 0.17 0.20 0.01 0.03 0.20 0.33 PFS/NA T284 0.23 99.3 T399 14 Y (3)
NRC-FCs2 59304 59334 -0.01 0.11 0.27 0.10 0.00 0.20 0.37 PFS/NA T389 0.23 98.6 T399 17 Y (4)
SYRTE-FO2 59304 59334 -0.14 0.20 0.21 0.05 0.00 0.20 0.35 PFS/NA T301 0.23 96.3 T399 36 Y (5)
SYRTE-FORb 59304 59334 -0.04 0.20 0.25 0.05 0.00 0.20 0.38 0.6 [1] T328 0.34 98.1 T399 36 Y (5)
PTB-CSF1 59304 59334 -0.19 0.07 0.26 0.01 0.00 0.07 0.28 PFS/NA T371 0.28 97.4 T399 27 Y (6)
PTB-CSF2 59304 59334 -0.39 0.10 0.17 0.01 0.00 0.07 0.21 PFS/NA T370 0.17 97.9 T399 39 Y (6)
SU-CsFO2 59304 59334 0.02 0.21 0.22 0.10 0.00 0.20 0.38 PFS/NA T315 0.50 93.0 T399 31 Y (7)

Notes:
(1) Continuously operating as a clock participating to TAI
(2) Report 07 MAY. 2021 by INRIM
(3) Report 04 MAY. 2021 by NPL
(4) Report 03 MAY. 2021 by NRC
(5) Report 03 MAY. 2021 by LNE-SYRTE
(6) Report 04 MAY. 2021 by PTB
(7) Report 30 APR. 2021 by SU
[1] CCTF Recommendation 2 (2017) : Updates to the CIPM list of standard frequencies in Consultative
Committee for Time and Frequency Report of the 21st meeting (2017), 2017, 56 p.

Table 2: Estimate of d by the BIPM based on all PSFS measurements identified to be used for TAI steering
over the period MJD 58944-59334, and corresponding uncertainties.

Period of estimation d u
59304-59334 -0.13x10-15 0.11x10-15 (2021 MAR 31 - 2021 APR 30)

4 - Relations of UTC and TAI with predictions of UTC(k) disseminated by GNSS.

[UTC-UTC(USNO)_GPS] = C0', [TAI-UTC(USNO)_GPS] = 37 s + C0'
[UTC-UTC(SU)_GLONASS]= C1', [TAI-UTC(SU)_GLONASS]= 37 s + C1'
Corrigendum: The values of C0' between MJD 59184 and MJD 59304 published in Circulars T396 to T399 were erroneous.
Typically 1-2 ns. Max 5.3 ns on 59275.
Corrected values have been published in the file https://webtai.bipm.org/ftp/pub/tai/other-products/utcgnss/utc-gnss.

For this edition of Circular T, σ0'= 0.6 ns, σ1'= 6.6 ns

2021 0h UTC MJD C0'/ns N0 C1'/ns N1'
MAR 31 59304 1.0 89 22.9 89
APR 1 59305 1.4 90 23.6 89
APR 2 59306 1.9 89 22.8 88
APR 3 59307 2.3 89 21.8 87
APR 4 59308 2.9 89 22.4 89
APR 5 59309 3.6 90 23.1 81
APR 6 59310 3.4 89 20.6 85
APR 7 59311 1.2 89 19.3 84
APR 8 59312 -0.2 89 20.9 85
APR 9 59313 0.2 90 20.2 88
APR 10 59314 1.6 89 19.3 84
APR 11 59315 1.4 89 22.4 89
APR 12 59316 1.5 89 23.8 87
APR 13 59317 2.2 90 21.6 87
APR 14 59318 1.7 89 19.6 80
APR 15 59319 1.5 89 18.6 85
APR 16 59320 1.3 89 17.7 89
APR 17 59321 2.6 90 16.7 89
APR 18 59322 2.8 89 17.1 88
APR 19 59323 0.6 89 19.6 89
APR 20 59324 0.9 89 20.0 85
APR 21 59325 1.6 90 18.2 86
APR 22 59326 2.2 89 19.6 84
APR 23 59327 2.9 89 22.3 84
APR 24 59328 2.8 89 21.3 86
APR 25 59329 2.0 90 18.8 85
APR 26 59330 1.9 89 18.0 89
APR 27 59331 2.5 89 17.7 88
APR 28 59332 1.1 89 17.2 88
APR 29 59333 0.4 90 18.5 87
APR 30 59334 0.7 89 20.1 81

5 - Time links used for the computation of TAI, calibrations information and corresponding uncertainties.

Link Type Equipment Cal_ID1 / Cal_ID2 uStb/ns uCal/ns uAg/ns Al/ns YYMM
AOS /PTB GPSPPP AO_4 /PT13 1014-2018 / 1001-2018 0.3 2.8 1.2
APL /PTB GPSPPP AP04 /PT13 NC / 1001-2018 0.3 20.0
AUS /PTB GPSPPP AU04 /PT13 1002-2010 / 1001-2018 0.3 11.2 10.0
BEV /PTB GPSPPP BE1_ /PT13 1012-2016 / 1001-2018 0.3 3.2 2.0
BFKH/PTB GPS MC MK01 /PT13 NC / 1001-2018 1.5 20.0
BIM /PTB GPSPPP BM51 /PT13 2007-2019 / 1001-2018 0.7 7.1 1.0
BIRM/PTB GPS P3 BI22 /PT13 1016-2018 / 1001-2018 0.7 2.7 1.0
BOM /PTB GPS MC MABM /PT13 NA_Al / 1001-2018 5.0 7.5 2.7 +4.4 2003
BY /PTB GPS MC BY46 /PT13 2001-2008 / 1001-2018 1.5 12.2 10.0
CAO /PTB GPS MC CA__ /PT13 NC / 1001-2018 1.5 20.0
CNES/PTB GPSPPP CS21 /PT13 1015-2018 / 1001-2018 0.7 2.8 1.3
CNM /PTB GPS MC CN00 /PT13 NA_Al / 1001-2018 4.0 11.2 10.0 -27.3 0804
CNMP/PTB GPS P3 MP1_ /PT13 NA_Al / 1001-2018 0.7 7.4 2.3 41.7 1807
DFNT/PTB GPS P3 DN__ /PT13 NC_Al / 1001-2018 0.7 20.0 10.3 1507
DLR NL
DMDM/PTB GPSPPP ZM68 /PT13 1011-2016 / 1001-2018 0.3 3.3 2.1
DTAG/PTB GPSPPP DT05 /PT13 1012-2019 / 1001-2018 0.3 2.8 1.0
EIM /PTB GPS MC EI__ /PT13 NA / 4.0 11.2 10.0
ESTC/PTB GPSPPP ES07 /PT13 1013-2020 / 1001-2018 0.3 2.7 1.0
HKO /PTB NL
ICE /PTB GPS MC CE1_ /PT13 NC / 1001-2018 2.5 20.0
IDN /PTB GPSPPP KI01 /PT13 1017-2018 / 1001-2018 0.3 2.7 1.1
IFAG/PTB GPSPPP IF20 /PT13 1014-2020 / 1001-2018 0.3 2.7 1.0
IGNA/PTB NL
IMBH/PTB GPS P3 BH02 /PT13 1011-2019 / 1001-2018 0.7 2.7 1.0
INCP/PTB GPS MC CP__ /PT13 NC / 1001-2018 5.0 20.0
INM /PTB GPS MC IC__ /PT13 NC / 1001-2018 1.5 20.0
INPL/PTB GPSPPP IL06 /PT13 2003-2016 / 1001-2018 0.3 7.3 2.0
INTI/PTB GPSPPP INTI /PT13 NC / 1001-2018 0.3 20.0
INXE/PTB GPSPPP NXRA /PT13 1012-2020 / 1001-2018 0.3 2.7 1.0
IPQ /PTB GPSPPP IP05 /PT13 NC / 1001-2018 0.5 20.0
JATC/PTB GPSPPP JA01 /PT13 1201-2018 / 1001-2018 0.3 2.8 1.3
JV /PTB GPSPPP JV02 /PT13 1101-2017 / 1001-2018 0.3 4.3 1.5
KRIS/PTB GPSPPP KRG1 /PT13 1017-2017 / 1001-2018 0.3 3.1 1.8
LRTE/PTB GPSPPP LRRC /PT13 NC / 1001-2018 0.3 20.0
LT /PTB GPSPPP LT02 /PT13 1014-2018 / 1001-2018 0.3 2.8 1.3
LUX /PTB GPSPPP LU01 /PT13 1012-2018 / 1001-2018 0.3 2.9 1.5
LV /PTB GPS MC LV01 /PT13 2001-2007 / 1001-2018 1.5 12.2 10.0
MASM/PTB GPSPPP MN__ /PT13 1019-2018 / 1001-2018 0.4 2.8 1.2
MBM /PTB GPS MC ME01 /PT13 NC_Al / 1001-2018 1.5 20.0 10.0 2104
MIKE/PTB GPSPPP MI04 /PT13 1016-2019 / 1001-2018 0.3 2.7 1.0
MSL /PTB GPS P3 MS0_ /PT13 NC / 1001-2018 1.5 20.0
NAO /PTB GPS MC NAT2 /PT13 NC / 1001-2018 2.0 20.0
NICT/PTB GPSPPP NC4S /PT13 1001-2020 / 1001-2018 0.3 2.0 1.0
NIM /PTB GPSPPP IM06 /PT13 1001-2020 / 1001-2018 0.3 2.0 1.0
NIMB/PTB GPSPPP MB02 /PT13 NA_Al / 1001-2018 0.3 7.4 2.4 32.2 1611
NIMT/PTB GPS P3 MTTI /PT13 NC / 1001-2018 0.7 20.0
NIS /PTB GPS P3 IS__ /PT13 NC_Al / 1001-2018 0.7 20.0 +16.4 1303
NMIJ/PTB GPSPPP NM0D /PT13 1001-2014 / 1001-2018 0.3 3.2 2.7
NMLS/PTB GPS MC LSM1 /PT13 1013-2017 / 1001-2018 1.5 3.3 1.8
NPLI/PTB GPSPPP LI2P /PT13 1013-2018 / 1001-2018 0.3 2.9 1.5
NRC /PTB GPSPPP NRC4 /PT13 1019-2017 / 1001-2018 0.3 3.0 1.6
NRL /PTB GPSPPP RL2_ /PT13 NC / 1001-2018 0.3 20.0
NSAI/PTB GPSPPP IE01 /PT13 2022-2019 / 1001-2018 0.4 7.1 1.0
NTSC/PTB GPSPPP NTP1 /PT13 1001-2016 / 1001-2018 0.3 2.6 2.0
ONBA/PTB GPS MC ON__ /PT13 1002-2004 / 1001-2018 2.0 11.2 10.0
ONRJ/PTB GPSPPP RJ03 /PT13 NC_Al / 1001-2018 0.4 20.0 -11.7 1912
ORB /PTB GPSPPP OR5Z /PT13 1011-2020 / 1001-2018 0.3 2.7 1.0
PL /PTB GPSPPP PL_3 /PT13 1014-2018 / 1001-2018 0.4 2.8 1.3
SASO/PTB GPSPPP SAS0 /PT13 1020-2017 / 1001-2018 0.7 3.0 1.6
SCL /PTB GPSPPP SC05 /PT13 1011-2018 / 1001-2018 0.3 2.9 1.5
SG /PTB GPSPPP SG01 /PT13 1019-2018 / 1001-2018 0.3 2.7 1.1
SIQ /PTB GPSPPP SI01 /PT13 1013-2019 / 1001-2018 0.3 3.6 1.0
SL /PTB GPSPPP SL01 /PT13 1017-2018 / 1001-2018 0.3 2.7 1.0
SMD /PTB GPSPPP SD01 /PT13 1014-2017 / 1001-2018 0.3 3.1 1.8
SMU /PTB GPS MC SM00 /PT13 NA_Al / 1001-2018 1.5 12.2 10.0 57.8 0908
SU /PTB GPSPPP SU31 /PT13 1001-2018 / 1001-2018 0.3 2.2 1.4
TL /PTB GPSPPP TLT1 /PT13 1001-2020 / 1001-2018 0.3 2.0 1.0
TP /PTB GPSPPP TP02 /PT13 1015-2019 / 1001-2018 0.3 2.7 1.0
UA /PTB GPS MC UA05 /PT13 2003-2018 / 1001-2018 3.0 7.1 1.3
UAE /PTB GPS MC AE__ /PT13 2001-2016 / 1001-2018 4.0 7.6 3.0
UME /PTB GPSPPP UM01 /PT13 1011-2016 / 1001-2018 0.3 3.3 2.1
VMI /PTB GPSPPP VM02 /PT13 2001-2019 / 1001-2018 0.4 7.1 1.0
ZA /PTB GPSPPP ZA02 /PT13 1018-2018 / 1001-2018 0.3 2.8 1.2
Link Type Equipment Cal_ID uStb/ns uCal/ns uAg/ns Al/ns YYMM
CH /PTB TWGPPP CH01 /PTB05 0523-2021 0.3 1.0 0.3
IT /PTB TWGPPP IT02 /PTB05 0502-2019 0.3 1.1 0.5
NIST/PTB TWGPPP NIST01/PTB05 0393-2015 0.3 2.1 1.6
NPL /PTB TWGPPP NPL02 /PTB05 0525-2021 0.3 1.0 0.3
OP /PTB TWSDRR OP51 /PTB55 0517-2020 0.3 1.1 0.4
ROA /PTB TWGPPP ROA01 /PTB05 0504-2019 0.3 1.1 0.4
SP /PTB TWGPPP SP01 /PTB05 0496-2019 0.3 1.1 0.5
USNO/PTB TWGPPP USNO01/PTB05 0395-2016 0.3 1.7 1.2
VSL /PTB TWGPPP VSL01 /PTB05 0527-2021 0.3 1.0 0.3