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Comparison Display

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class="breadcrumb-section--link">Home</a> </li> <li class="breadcrumb-section--item"> <span>Comparisons</span> </li> </ul> </div> </div> </div> </div> <section id="tabsPage" class="comparison-display"> <section class="section_search-tabs section_create-comparison"> <div class="container"> <div class="row"> <div class="col-lg-12"> <div class="comparison-tabs-navigation-wrapper"> <ul class="tabs-list comparison-tabs-navigation _justified"> <li class="tabs-list-item js-info-tab-item active"> <a href="#informationTab" data-tab="tab1"> <span>Information</span> </a> </li> <li class="tabs-list-item js-graph-tab-item" > <a href="#graphsTab" data-tab="tab2"> <span>Graphs of Equivalence</span> </a> </li> <li class="tabs-list-item js-degrees-tab-item" > <a href="#degreesOfEquivalence" data-tab="tab3"> <span>Degrees of equivalence</span> </a> </li> <li class="tabs-list-item js-statements-tab-item" > <a href="#equivalenceStatementTab" data-tab="tab4"> <span>Equivalence statements</span> </a> </li> <li class="tabs-list-item js-measurements-tab-item"> <a href="#laboratoryMeasurementTab" data-tab="tab5"> <span>Laboratory measurements</span> </a> </li> </ul> </div> </div> </div> </div> </section> <section class="container tab-section" id="graphsTab"> <div class="tab-section__left-sidebar sticky" id="selectSection"> <div class="information-list-wrap"> <div> <div class="tab-top__filter__wrapper"> <a class="mob-filter-btn" href="#">Comparison</a> <div class="mod-title mob-wrapper"> Comparison <a class="mob-close" href="#">close</a> </div> <div class="filter-wrapper mob-wrapper"> <div class="tab-top__filter__item"> <div class="filter__item__title">Results</div> <div class="filter__item__wrapper"> <ul id="sectionList" class="information-list"> <li id="section-id-4173"> <a href="#tabsPage" onclick="sectionDetailTabsView.selectSection(&#39;4173&#39;)">CCTF-K001.UTC</a> </li> </ul> </div> </div> </div> </div> </div> </div> </div> <div class="tab-section__content" id="tab-section-4173"> <div class="tab-section__content-heading tab-section__content-heading_description-tabs"> <div class="tab-section__title"></div> <div class="tab-btn__wrapper"> <a class="tab-btn print-out" href="#print-out-popup"> <img src="/kcdb/static/icons/print-out-26b37ecfd24015b0ce7c6017c52bb708.svg" alt=""> <span>print out</span> </a> </div> </div> <div class="info-block js-block-content"> <div class="result-description"><p>No graphs of equivalence are included in the KCDB for this comparison.</p> </div> </div> </div> </section> <section class="container tab-section" id="degreesOfEquivalence"> <div class="tab-section__left-sidebar sticky" id="selectSection"> <div class="information-list-wrap"> <div> <div class="tab-top__filter__wrapper"> <a class="mob-filter-btn" href="#">Comparison</a> <div class="mod-title mob-wrapper"> Comparison <a class="mob-close" href="#">close</a> </div> <div class="filter-wrapper mob-wrapper"> <div class="tab-top__filter__item"> <div class="filter__item__title">Results</div> <div class="filter__item__wrapper"> <ul id="sectionList" class="information-list"> <li id="section-id-4173"> <a href="#tabsPage" onclick="sectionDetailTabsView.selectSection(&#39;4173&#39;)">CCTF-K001.UTC</a> </li> </ul> </div> </div> </div> </div> </div> </div> </div> <div class="tab-section__content" id="tab-section-4173"> <div class="tab-section__content-heading tab-section__content-heading_description-tabs"> <div class="tab-section__title"></div> <div class="tab-btn__wrapper"> <a class="tab-btn print-out" href="#print-out-popup"> <img src="/kcdb/static/icons/print-out-26b37ecfd24015b0ce7c6017c52bb708.svg" alt=""> <span>print out</span> </a> </div> </div> <div class="info-block js-block-content"> <div class="result-description"><p>Degrees of equivalence <strong><em>D<sub>k</sub></em> = [<em>UTC </em>-<em> UTC </em>(<em>k</em>)] </strong>and associated expanded uncertainty <strong><em>U<sub>k</sub></em> </strong>for <a href="https://www.bipm.org/documents/d/guest/cctf-k001-utc_2401" target="_blank">January 2024</a></p> <p>Degrees of equivalence <strong><em>D<sub>k</sub></em> = [<em>UTC</em> - <em>UTC</em> (<em>k</em>)] </strong>and associated expanded uncertainty <em><strong>U<sub>k</sub> </strong></em>for <a href="https://www.bipm.org/documents/d/guest/cctf-k001-utc_2402" target="_blank">February 2024</a></p> <p>Degrees of equivalence <strong><em>D<sub>k</sub></em> = [<em>UTC</em> - <em>UTC</em> (<em>k</em>)]</strong> and associated expanded uncertainty <em><strong>U<sub>k</sub></strong></em> for <a href="https://www.bipm.org/documents/d/guest/cctf-k001-utc_2403" target="_blank">March 2024</a></p> <p>Degrees of equivalence <strong><em>D<sub>k</sub></em> = [<em>UTC</em> - <em>UTC</em> (<em>k</em>)] </strong>and associated expanded uncertainty <em><strong>U<sub>k</sub></strong></em><sub> </sub>for <a href="https://www.bipm.org/documents/d/guest/cctf-k001-utc_2404" target="_blank">April 2024</a></p> <p><span class="standard_12px">Degrees of equivalence <strong><em>D<sub>k</sub></em> = [<em>UTC</em> - <em>UTC </em>(<em>k</em>)] </strong>and associated expanded uncertainty <em><strong>U<sub>k</sub></strong></em> for <a class="bleu_12px" href="https://www.bipm.org/documents/d/guest/cctf-k001-utc_2405" target="_blank">May 2024</a></span></p> <p><span class="standard_12px">Degrees of equivalence <strong><em>D<sub>k</sub></em> = [<em>UTC</em> - <em>UTC </em>(<em>k</em>)] </strong>and associated expanded uncertainty <em><strong>U<sub>k</sub></strong></em> for <a class="bleu_12px" href="https://www.bipm.org/documents/d/guest/cctf-k001-utc_2406" target="_blank">June 2024</a></span></p> <p><span class="standard_12px">Degrees of equivalence <strong><em>D<sub>k</sub></em> = [<em>UTC</em> - <em>UTC </em>(<em>k</em>)] </strong>and associated expanded uncertainty <em><strong>U<sub>k</sub></strong></em> for <a href="https://www.bipm.org/documents/d/guest/cctf-k001-utc_2407" target="_blank">July 2024</a></span></p> <p><span class="standard_12px">Degrees of equivalence <strong><em>D<sub>k</sub></em> = [<em>UTC</em> - <em>UTC </em>(<em>k</em>)] </strong>and associated expanded uncertainty <em><strong>U<sub>k</sub></strong></em> for <a href="https://www.bipm.org/documents/d/guest/cctf-k001-utc_2408" target="_blank">August 2024</a></span></p> <p><span class="standard_12px">Degrees of equivalence <strong><em>D<sub>k</sub></em> = [<em>UTC</em> - <em>UTC </em>(<em>k</em>)] </strong>and associated expanded uncertainty <em><strong>U<sub>k</sub></strong></em> for <a class="bleu_12px" href="https://www.bipm.org/documents/d/guest/cctf-k001-utc_2409" target="_blank">September 2024</a></span></p> <p><span class="standard_12px">Degrees of equivalence <strong><em>D<sub>k</sub></em> = [<em>UTC</em> - <em>UTC </em>(<em>k</em>)] </strong>and associated expanded uncertainty <em><strong>U<sub>k</sub></strong></em> for <a class="bleu_12px" href="https://www.bipm.org/documents/d/guest/cctf-k001-utc_2410" target="_blank">October 2024</a></span></p> <p><span class="standard_12px">Degrees of equivalence <strong><em>D<sub>k</sub></em> = [<em>UTC</em> - <em>UTC </em>(<em>k</em>)] </strong>and associated expanded uncertainty <em><strong>U<sub>k</sub></strong></em> for <a href="https://www.bipm.org/documents/d/guest/cctf-k001-utc_2411" target="_blank">November 2024</a></span></p> <p><span class="standard_12px">Degrees of equivalence <strong><em>D<sub>k</sub></em> = [<em>UTC</em> - <em>UTC </em>(<em>k</em>)] </strong>and associated expanded uncertainty <em><strong>U<sub>k</sub></strong></em> for <a href="https://https://www.bipm.org/documents/d/guest/cctf-k001-utc_2412" target="_blank">December 2024</a></span></p> <p>Degrees of equivalence <strong><em>D<sub>k</sub></em> = [<em>UTC </em>-<em> UTC </em>(<em>k</em>)] </strong>and associated expanded uncertainty <strong><em>U<sub>k</sub></em> </strong>for <a href="https://www.bipm.org/documents/d/guest/cctf-k001-utc_2501" target="_blank">January 2025</a></p> </div> </div> </div> </section> <section class="container tab-section active" id="informationTab"> <div class="tab-section__left-sidebar sticky"> <div class="information-list-wrap"> <div> <div class="tab-top__filter__wrapper"> <a class="mob-filter-btn" href="#">Comparison</a> <div class="mod-title mob-wrapper"> Comparison <a class="mob-close" href="#">close</a> </div> <div class="filter-wrapper mob-wrapper"> <div class="tab-top__filter__item"> <div class="filter__item__title"><span>CC</span> comparison</div> <div class="filter__item__wrapper"> <ul class="information-list"> <li> <a href="/kcdb/comparison?id=735" class="active">CCTF-K001.UTC</a> </li> </ul> </div> <div class="filter__item__title">Linked comparison</div> <div class="filter__item__wrapper"> <ul class="information-list"> </ul> </div> </div> </div> </div> </div> </div> </div> <div class="tab-section__content"> <div class="tab-section__content-heading"> <div class="tab-section__title">CCTF-K001.UTC</div> <div class="tab-btn__wrapper"> <a class="tab-btn print-out" href="#print-out-popup"> <img src="/kcdb/static/icons/print-out-26b37ecfd24015b0ce7c6017c52bb708.svg" alt=""> <span>print out</span> </a> </div> </div> <div class="content-tabs"> <ul class="content-tabs__nav"> <li> <a href="#contentTabsInformation" class="active" data-toggle="tab">Information &amp; contact</a> </li> <li> <a href="#contentTabsParticipants" data-toggle="tab">Participants</a> </li> </ul> <div class="content-tabs-wrap"> <div class="content-tab active" id="contentTabsInformation"> <div class="info-block"> <table class="info-block__table"> <tr> <td>Metrology area, Sub-field</td> <td><span>Time and Frequency</span>, <span>Time</span></td> </tr> <tr> <td>Description</td> <td>Calculation of the reference time scale UTC (Coordinated Universal Time)</td> </tr> <tr> <td>Time of measurements</td> <td> <span>1977</span><span > - <span></span></span></td> </tr> <tr> <td>Status</td> <td>Continuous, approved for equivalence</td> </tr> </table> <table class="info-block__table"> <tr> <td>References</td> <td> <p class="without-margin-bottom"> <a href="/kcdb/comparison/doc/download/735/Guidelines_CCTF-K001.UTC.pdf" download><span lang="EN-US" style="font-size:11.0pt"><span style="line-height:107%"><span style="font-family:" calibri="">Guidelines for participation in the ongoing key comparison in time CCTF-K001.UTC</span></span></span></a> </p> <p class="without-margin-bottom"> <a href="https://iopscience.iop.org/article/10.1088/0026-1394/40/4/307" target="_blank"><em>Metrologia</em> <strong>40</strong> 2003 pp. 184 - 188</a> </p> <p class="without-margin-bottom"> <a href="https://iopscience.iop.org/article/10.1088/1681-7575/ab1e68/pdf" target="_blank"><em>Metrologia</em> <strong>56</strong> 2019 042001 (26 pp.)<br></a> </p> </tr> <tr> <td>Measurand</td> <td><span class="without-margin-bottom">[UTC - UTC(<em>k</em>)] in ns<br /> UTC(<em>k</em>) is the local representation of UTC maintained by the laboratory <em>k</em></span><br/> <span class="without-margin-bottom"></span></td> </tr> <tr> <td>Transfer device</td> <td class="without-margin-bottom">Time transfer between participants is carried out using Global Positioning System (GPS) and Two-Way Satellite Time and Frequency Transfer (TWSTFT)</td> </tr> </table> <table class="info-block__table"> <tr> <td>Comparison type</td> <td><span>Key Comparison</span></td> </tr> <tr> <td>Consultative Committee</td> <td><span>CCTF</span> (<span>Consultative Committee for Time and Frequency</span>) </td> </tr> <tr> <td>Conducted by</td> <td><span>CCTF</span> (<span>Consultative Committee for Time and Frequency</span>) </td> </tr> <tr> <td>Comments</td> <td><strong>Most recent KCDB update: 13 February 2025</strong><br /> <br /> Values are available every 5 days on MJD's ending by "4" and "9" (MJD: Modified Julian Day).<br /> They are published in the monthly <em>Circular T</em> and in the <em>BIPM Time Section Annual Report</em>.<br /> <br /> The laboratories listed in the tab "Participants" are those which contributed to the <em>Circular T.</em> The RMO indicated is the RMO representing the National Metrology Institute of the state or economy.<br /> <br /> At its 17th meeting in September 2006, the CCTF decided to assign the identifier "CCTF-K001.UTC" to this key comparison, first registered as "CCTF-K2001.UTC" in January 2005 (see page 28 of the Report of the 17th CCTF meeting).<br /> This was implemented in the KCDB on 19 March 2007.<br /> <br /> Additonal data for CCTF-K001.UTC: <a href="https://www.bipm.org/en/time-metrology">https://www.bipm.org/en/time-metrology</a> gives access to successive issues of Circular T since No 125 (May 1998), and complete sets of values of [UTC - UTC(k)] since 1998.</td> </tr> <tr class="row-blue-bg"> <td>Pilot institute</td> <td> <a href="http://www.bipm.org" target="_blank">BIPM</a> <br/> <span>Bureau International des Poids et Mesures</span><br/> <span>BIPM - International Organization</span><br/> </tr> <tr class="row-blue-bg"> <td>Contact person</td> <td><span>Patrizia Tavella</span><br/> <a href="bWFpbHRvOnBhdHJpemlhLnRhdmVsbGFAYmlwbS5vcmc=" target="_blank" class="mlink hidden"></a><div class="mlink-copy" title="Click to copy in the clipboard"></div><br/> <span>+33 (0)1 45 07 70 76</span></td> </tr> </table> </div> <div id="showInfoPopin" class="mfp-hide white-popup-block small-popup-block"> <div class="form-horizontal form-horizontal_with-padding-top"> <div class="form-group person-names"> <span id="person-first-name" data-name="firstName">First Name</span> <span id="person-last-name" data-name="lastName">Last Name</span> </div> <div class="form-group person-info_wrapper"> <a href="#" class="person-info_item" id="person-mail" data-name="email">wwww@ww.www</a> <span class="person-info_item" id="person-telephone" data-name="phone">+356719836</span> <a href="#" target="_blank" id="person-institute" class="person-info_item" data-name="instituteSite">Institute 1</a> <span id="person-institute" class="person-info_item" data-name="instituteName">Institute 1</span> <span class="person-info_item" id="person-country" data-name="countryName">Khmelnitskiy</span> </div> <div class="form_create-cmc--btn"> <button class="popup-modal-dismiss cmc-button reset" type="button">Quit</button> </div> </div> </div> </div> <div class="content-tab" id="contentTabsParticipants"> <div class="info-block participant-block"> <table class="info-block__table table-blue-bg"> <thead> <tr> <th colspan="2">Pilot laboratory</th> </tr> </thead> <tr> <td> <a class="comparison-link" href="http://www.bipm.org" target="_blank">BIPM</a> </td> <td> <p class="comparison-info"> <span>Bureau International des Poids et Mesures</span>, <span>BIPM - International Organization</span>, <span>N/A</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="" target="_blank">AOS</a> </td> <td> <p class="comparison-info"> <span>Astrogeodynamical Observatory, Space Research Centre P.A.S.</span>, <span>Poland</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="" target="_blank">APL</a> </td> <td> <p class="comparison-info"> <span>Applied Physics Laboratory</span>, <span>United States</span>, <span>SIM</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.bev.gv.at" target="_blank">BEV</a> </td> <td> <p class="comparison-info"> <span>Bundesamt für Eich- und Vermessungswesen</span>, <span>Austria</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.kormanyhivatal.hu/hu/budapest" target="_blank">BFKH</a> </td> <td> <p class="comparison-info"> <span>Government Office of the Capital City Budapest</span>, <span>Hungary</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.bim.government.bg/" target="_blank">BIM</a> </td> <td> <p class="comparison-info"> <span>Bulgarian Institute of Metrology</span>, <span>Bulgaria</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <span class="comparison-link">BIRM</span> </td> <td> <p class="comparison-info"> <span>Beijing Institute of Radio Metrology and Measurement</span>, <span>China</span>, <span>APMP</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.metrologija.gov.me/index.php" target="_blank">BMM</a> </td> <td> <p class="comparison-info"> <span>Bureau of Metrology (Montenegro)</span>, <span>Montenegro</span>, <span>EURAMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "MBM" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.bom.gov.mk/?lang=en" target="_blank">BOM</a> </td> <td> <p class="comparison-info"> <span>Bureau of Metrology, Ministry of Economy (North Macedonia)</span>, <span>North Macedonia</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.jbs.org.jm/indexmain.htm" target="_blank">BSJ</a> </td> <td> <p class="comparison-info"> <span>Bureau of Standards Jamaica</span>, <span>Jamaica</span>, <span>SIM</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://belgim.by/en/" target="_blank">BelGIM</a> </td> <td> <p class="comparison-info"> <span>Belarussian State Institute for Metrology</span>, <span>Belarus</span>, <span>COOMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "BY" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="" target="_blank">CAO</a> </td> <td> <p class="comparison-info"> <span>Cagliari Astronomical Observatory</span>, <span>Italy</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.cenam.mx" target="_blank">CENAM</a> </td> <td> <p class="comparison-info"> <span>Centro Nacional de Metrologia</span>, <span>Mexico</span>, <span>SIM</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "CNM" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.cenamep.org.pa/" target="_blank">CENAMEP AIP</a> </td> <td> <p class="comparison-info"> <span>Centro Nacional de Metrología de Panama AIP</span>, <span>Panama</span>, <span>SIM</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "CNMP" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="" target="_blank">CNES</a> </td> <td> <p class="comparison-info"> <span>Centre National d'Études Spatiales</span>, <span>France</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.defense.tn" target="_blank">DEF-NAT</a> </td> <td> <p class="comparison-info"> <span>Laboratoire de Métrologie de la Direction Générale des Transmissions et de l'Informatique</span>, <span>Tunisia</span>, <span>AFRIMETS</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "DFNT" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://dfm.dk/" target="_blank">DFM</a> </td> <td> <p class="comparison-info"> <span>Danish Fundamental Metrology A/S</span>, <span>Denmark</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.dlr.de/EN/Home/home_node.html" target="_blank">DLR</a> </td> <td> <p class="comparison-info"> <span>Deutsche Zentrum fuer Luft - und Raumfahrt (German Aerospace Center)</span>, <span>Germany</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.dmdm.rs/en/index.php" target="_blank">DMDM</a> </td> <td> <p class="comparison-info"> <span>Directorate of Measures and Precious Metals</span>, <span>Serbia</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="" target="_blank">DTAG</a> </td> <td> <p class="comparison-info"> <span>Deutsche Telekom AG</span>, <span>Germany</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <span class="comparison-link">DZM</span> </td> <td> <p class="comparison-info"> <span>State Office for Metrology</span>, <span>Croatia</span>, <span>EURAMET</span> </p> </td> </tr> <tr> <td class="links-date">Note :</td> <td> <p class="comparison-comment">registered under the acronym "IFZG" in <em>Circular T</em><br></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.eim.org.gr" target="_blank">EIM</a> </td> <td> <p class="comparison-info"> <span>Hellenic Institute of Metrology</span>, <span>Greece</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://qcc.abudhabi.ae/ar-ae/Pages/default.aspx/" target="_blank">EMI</a> </td> <td> <p class="comparison-info"> <span>Emirates Metrology Institute</span>, <span>United Arab Emirates</span>, <span>GULFMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "UAE" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.esa.int/About_Us/ESTEC/ESTEC_European_Space_Research_and_Technology_Centre" target="_blank">ESA</a> </td> <td> <p class="comparison-info"> <span>European Space Agency - European Space Research and Technology Centre</span>, <span>European Union</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.ftmc.lt/en" target="_blank">FTMC</a> </td> <td> <p class="comparison-info"> <span>Center for Physical Sciences and Technology</span>, <span>Lithuania</span>, <span>EURAMET</span> </p> </td> </tr> <tr> <td class="links-date">Note</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "LT" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.gum.gov.pl" target="_blank">GUM</a> </td> <td> <p class="comparison-info"> <span>Glowny Urzad Miar, Central Office of Measures</span>, <span>Poland</span>, <span>EURAMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "PL" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.hko.gov.hk/en/index.html" target="_blank">HKO</a> </td> <td> <p class="comparison-info"> <span>Hong Kong Observatory</span>, <span>Hong Kong, China</span>, <span>APMP</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.acronymfinder.com/Institut-Fuer-Angewandte-Geodaesie-(German%3A-Institute-for-Applied-Geodesy%3B-Frankfurt%2C-Germany)-(IFAG).html" target="_blank">IFAG</a> </td> <td> <p class="comparison-info"> <span>Bundesamt für Kartographie und Geodäsie</span>, <span>Germany</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.ign.gob.ar/" target="_blank">IGNA</a> </td> <td> <p class="comparison-info"> <span>Instituto Geográfico Nacional</span>, <span>Argentina</span>, <span>SIM</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://portail-qualite.public.lu/fr/acteurs/ilnas.html" target="_blank">ILNAS</a> </td> <td> <p class="comparison-info"> <span>Bureau Luxembourgeois de Métrologie</span>, <span>Luxembourg</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.met.gov.ba/" target="_blank">IMBIH</a> </td> <td> <p class="comparison-info"> <span>Institute of Metrology of Bosnia and Herzegovina</span>, <span>Bosnia and Herzegovina</span>, <span>EURAMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "IMBH" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.inacal.gob.pe" target="_blank">INACAL</a> </td> <td> <p class="comparison-info"> <span>National Institute for Quality</span>, <span>Peru</span>, <span>SIM</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "INCP" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.inm.ro" target="_blank">INM</a> </td> <td> <p class="comparison-info"> <span>National Institute of Metrology</span>, <span>Romania</span>, <span>EURAMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "NIMB" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://inm.gov.co/web/" target="_blank">INM (CO)</a> </td> <td> <p class="comparison-info"> <span>Instituto Nacional de Metrología de Colombia</span>, <span>Colombia</span>, <span>SIM</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "INM" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.gov.br/inmetro/" target="_blank">INMETRO</a> </td> <td> <p class="comparison-info"> <span>Instituto Nacional de Metrologia, Qualidade e Tecnologia</span>, <span>Brazil</span>, <span>SIM</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "INXE" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <span class="comparison-link">INPL</span> </td> <td> <p class="comparison-info"> <span>National Physical Laboratory of Israel</span>, <span>Israel</span>, <span>N/A</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.inrim.it/" target="_blank">INRIM</a> </td> <td> <p class="comparison-info"> <span>Istituto Nazionale di Ricerca Metrologica</span>, <span>Italy</span>, <span>EURAMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "IT" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.argentina.gob.ar/inti" target="_blank">INTI</a> </td> <td> <p class="comparison-info"> <span>Instituto Nacional de Tecnologia Industrial</span>, <span>Argentina</span>, <span>SIM</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.ufe.cz/cs" target="_blank">IPE/ASCR</a> </td> <td> <p class="comparison-info"> <span>Institute of Photonics and Electronics, Czech Academy of Sciences</span>, <span>Czechia</span>, <span>EURAMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "TP" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.ipq.pt" target="_blank">IPQ</a> </td> <td> <p class="comparison-info"> <span>Instituto Portugues da Qualidade</span>, <span>Portugal</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="" target="_blank">JATC</a> </td> <td> <p class="comparison-info"> <span>Joint Atomic Time Commission</span>, <span>China</span>, <span>APMP</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.justervesenet.no" target="_blank">JV</a> </td> <td> <p class="comparison-info"> <span>Justervesenet</span>, <span>Norway</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.kebs.org/" target="_blank">KEBS</a> </td> <td> <p class="comparison-info"> <span>Kenya Bureau of Standards</span>, <span>Kenya</span>, <span>AFRIMETS</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.kriss.re.kr" target="_blank">KRISS</a> </td> <td> <p class="comparison-info"> <span>Korea Research Institute of Standards and Science</span>, <span>Korea, Republic of</span>, <span>APMP</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "KRIS" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.kazinmetr.kz/" target="_blank">KazStandard</a> </td> <td> <p class="comparison-info"> <span>Kazakhstan Institute of Standardization and Metrology</span>, <span>Kazakhstan</span>, <span>COOMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "KZ" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.lacomet.go.cr/" target="_blank">LACOMET</a> </td> <td> <p class="comparison-info"> <span>Laboratorio Costarricense de Metrologia</span>, <span>Costa Rica</span>, <span>SIM</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "ICE" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://lte.observatoiredeparis.psl.eu/" target="_blank">LNE-OP</a> </td> <td> <p class="comparison-info"> <span>Observatoire de Paris/Laboratoire Temps Espace</span>, <span>France</span>, <span>EURAMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "OP" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="" target="_blank">LRTE</a> </td> <td> <p class="comparison-info"> <span>Laboratorio de Referencia de Tempo e Espaço</span>, <span>Brazil</span>, <span>SIM</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <span class="comparison-link">MASM</span> </td> <td> <p class="comparison-info"> <span>Mongolian Agency for Standardization and Metrology</span>, <span>Mongolia</span>, <span>APMP</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.metas.ch" target="_blank">METAS</a> </td> <td> <p class="comparison-info"> <span>Federal Institute of Metrology</span>, <span>Switzerland</span>, <span>EURAMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "CH" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.mikes.fi" target="_blank">MIKES</a> </td> <td> <p class="comparison-info"> <span>VTT Technical Research Centre of Finland Ltd, Centre for Metrology/Mittatekniikan keskus</span>, <span>Finland</span>, <span>EURAMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "MIKE" in <i>Circular T</i></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.siq.si/en/" target="_blank">MIRS/SIQ/Metrology</a> </td> <td> <p class="comparison-info"> <span>MIRS/Slovenian Institute of Quality and Metrology/Metrology</span>, <span>Slovenia</span>, <span>EURAMET</span> </p> </td> </tr> <tr> <td class="links-date">Note</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "SIQ" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.measurement.govt.nz/" target="_blank">MSL</a> </td> <td> <p class="comparison-info"> <span>Measurement Standards Laboratory</span>, <span>New Zealand</span>, <span>APMP</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.uebele.com/en/projekte/orientierungssystem/king-abdullah-center-for-crescent-observation-and-astronomy.html#1" target="_blank">MTC</a> </td> <td> <p class="comparison-info"> <span>MAKKAH Time Centre - King Abdulah Centre for Crescent Observations and Astronomy</span>, <span>Saudi Arabia</span>, <span>GULFMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <span class="comparison-link">MUSSD</span> </td> <td> <p class="comparison-info"> <span>Department of Measurement Units, Standards and Services</span>, <span>Sri Lanka</span>, <span>APMP</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <p class="comparison-comment">registered under the acronym “SL” in Circular T <br></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="" target="_blank">NAO</a> </td> <td> <p class="comparison-info"> <span>National Astronomical Observatory</span>, <span>Japan</span>, <span>APMP</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.nict.go.jp/overview/index.html" target="_blank">NICT</a> </td> <td> <p class="comparison-info"> <span>National Institute of Information and Communications Technology</span>, <span>Japan</span>, <span>APMP</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.nim.ac.cn" target="_blank">NIM</a> </td> <td> <p class="comparison-info"> <span>National Institute of Metrology</span>, <span>China</span>, <span>APMP</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.nimt.or.th/" target="_blank">NIMT</a> </td> <td> <p class="comparison-info"> <span>National Institute of Metrology (Thailand)</span>, <span>Thailand</span>, <span>APMP</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.nis.sci.eg/" target="_blank">NIS</a> </td> <td> <p class="comparison-info"> <span>National Institute for Standards</span>, <span>Egypt</span>, <span>AFRIMETS</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.nist.gov" target="_blank">NIST</a> </td> <td> <p class="comparison-info"> <span>National Institute of Standards and Technology</span>, <span>United States</span>, <span>SIM</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.a-star.edu.sg/nmc" target="_blank">NMC, A*STAR</a> </td> <td> <p class="comparison-info"> <span>National Metrology Centre, Agency for Science, Technology and Research</span>, <span>Singapore</span>, <span>APMP</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "SG" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.measurement.gov.au/" target="_blank">NMIA</a> </td> <td> <p class="comparison-info"> <span>National Measurement Institute, Australia</span>, <span>Australia</span>, <span>APMP</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "AUS" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://unit.aist.go.jp/nmij/english/" target="_blank">NMIJ AIST</a> </td> <td> <p class="comparison-info"> <span>National Metrology Institute of Japan</span>, <span>Japan</span>, <span>APMP</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.nmim.gov.my" target="_blank">NMIM</a> </td> <td> <p class="comparison-info"> <span>National Metrology Institute of Malaysia</span>, <span>Malaysia</span>, <span>APMP</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "NMLS" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.nmisa.org" target="_blank">NMISA</a> </td> <td> <p class="comparison-info"> <span>National Metrology Institute of South Africa</span>, <span>South Africa</span>, <span>AFRIMETS</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "ZA" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.npl.co.uk" target="_blank">NPL</a> </td> <td> <p class="comparison-info"> <span>National Physical Laboratory</span>, <span>United Kingdom</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.nplindia.org/index.php/home-hindi/" target="_blank">NPLI</a> </td> <td> <p class="comparison-info"> <span>CSIR National Physical Laboratory of India</span>, <span>India</span>, <span>APMP</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://nrc.canada.ca/en/research-development/research-collaboration/research-centres/metrology-research-centre" target="_blank">NRC</a> </td> <td> <p class="comparison-info"> <span>National Research Council</span>, <span>Canada</span>, <span>SIM</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="" target="_blank">NRL</a> </td> <td> <p class="comparison-info"> <span>US Naval Research Laboratory</span>, <span>United States</span>, <span>SIM</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.nsai.ie" target="_blank">NSAI NML</a> </td> <td> <p class="comparison-info"> <span>NSAI National Metrology Laboratory</span>, <span>Ireland</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.metrology.kharkov.ua/" target="_blank">NSC IM</a> </td> <td> <p class="comparison-info"> <span>National Scientific Centre "Institute of Metrology"</span>, <span>Ukraine</span>, <span>EURAMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "UA" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="" target="_blank">NTSC</a> </td> <td> <p class="comparison-info"> <span>National Time Service Center of China</span>, <span>China</span>, <span>APMP</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.horalegalbrasil.mct.on.br/" target="_blank">ON/DSHO</a> </td> <td> <p class="comparison-info"> <span>Observatório Nacional/Serviço Nacional da Hora</span>, <span>Brazil</span>, <span>SIM</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "ONRJ" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="" target="_blank">ONBA</a> </td> <td> <p class="comparison-info"> <span>Observatorio Naval Buenos Aires</span>, <span>Argentina</span>, <span>SIM</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="" target="_blank">ORB</a> </td> <td> <p class="comparison-info"> <span>Observatoire Royal de Belgique</span>, <span>Belgium</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.ptb.de" target="_blank">PTB</a> </td> <td> <p class="comparison-info"> <span>Physikalisch-Technische Bundesanstalt</span>, <span>Germany</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.ri.se/" target="_blank">RISE</a> </td> <td> <p class="comparison-info"> <span>Research Institutes of Sweden AB</span>, <span>Sweden</span>, <span>EURAMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "SP" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://armada.defensa.gob.es/ArmadaPortal/page/Portal/ArmadaEspannola/cienciaobservatorio/prefLang-es/" target="_blank">ROA</a> </td> <td> <p class="comparison-info"> <span>Real Instituto y Observatorio de la Armada</span>, <span>Spain</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.saso.gov.sa/en/pages/default.aspx" target="_blank">SASO-NMCC</a> </td> <td> <p class="comparison-info"> <span>National Measurement and Calibration Center - Saudi Standards, Metrology and Quality Organization</span>, <span>Saudi Arabia</span>, <span>GULFMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <p class="comparison-comment">registered under the acronym “SASO” in Circular T <br></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.info.gov.hk/itc/scl" target="_blank">SCL</a> </td> <td> <p class="comparison-info"> <span>Standards and Calibration Laboratory</span>, <span>Hong Kong, China</span>, <span>APMP</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://economie.fgov.be/smd" target="_blank">SMD</a> </td> <td> <p class="comparison-info"> <span>Service de la Métrologie Belge</span>, <span>Belgium</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.smu.sk/" target="_blank">SMU</a> </td> <td> <p class="comparison-info"> <span>Slovensky Metrologicky Ustav</span>, <span>Slovakia</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.bsn.go.id/" target="_blank">SNSU-BSN</a> </td> <td> <p class="comparison-info"> <span>National Measurement Standard - National Standardization Agency of Indonesia</span>, <span>Indonesia</span>, <span>APMP</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <p class="comparison-comment">registered under the acronym "IDN" in <em>Circular T</em><br></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.stdtime.gov.tw/english/e-home.htm" target="_blank">TL</a> </td> <td> <p class="comparison-info"> <span>Telecommunication Laboratories, ChungHwa Telecom Co. Ltd.</span>, <span>Chinese Taipei</span>, <span>APMP</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.ume.tubitak.gov.tr" target="_blank">UME</a> </td> <td> <p class="comparison-info"> <span>T&Uuml;BITAK Ulusal Metroloji Enstit&uuml;s&uuml;</span>, <span>Türkiye</span>, <span>EURAMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <span class="comparison-link">USNO</span> </td> <td> <p class="comparison-info"> <span>United States Naval Observatory</span>, <span>United States</span>, <span>SIM</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.nim.uz/" target="_blank">UzNIM</a> </td> <td> <p class="comparison-info"> <span>Uzbek National Institute of Metrology</span>, <span>Uzbekistan</span>, <span>COOMET</span> </p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.vmi.gov.vn/" target="_blank">VMI-STAMEQ</a> </td> <td> <p class="comparison-info"> <span>Viet Nam Metrology Institute, Directorate for Standards and Quality</span>, <span>Viet Nam</span>, <span>APMP</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "VMI" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="https://www.vniiftri.ru/" target="_blank">VNIIFTRI</a> </td> <td> <p class="comparison-info"> <span>Institute of Physical Technical and Radiotechnical Measurements, Rosstandart</span>, <span>Russian Federation</span>, <span>COOMET</span> </p> </td> </tr> <tr> <td class="links-date">Note:</td> <td> <div class="link-wrapper"> <a href="https://www.bipm.org/utils/common/pdf/KCDB_2.0/Message_on_No_Link.pdf" target="_blank">registered under the acronym "SU" in <I>Circular T</I></a> </div> <p class="comparison-comment"></p> </td> </tr> </table> <table class="info-block__table table-bg"> <tr> <td> <a class="comparison-link" href="http://www.vsl.nl/" target="_blank">VSL</a> </td> <td> <p class="comparison-info"> <span>VSL</span>, <span>Netherlands</span>, <span>EURAMET</span> </p> </td> </tr> </table> </div> </div> </div> </div> </div> <div id="print-out-popup" class="popup-action-notification print-out-popup mfp-hide"> <h1>Key and supplementary comparisons - Print out</h1> <div class="print-out-popup__content"> <p>This page proposes print-out on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).</p> <p>Please, select items to be printed out, then click on &quot;OK&quot; :</p> <div class="print-out-form_inner-wrap"> <div class="print-out-form__checkbox-row" > <input type="checkbox" checked="checked" name="informationsAndContacts" class="reloadTable sections" id="informations_and_contacts" onclick="clearPrintOutError();"> <label for="informations_and_contacts"> <span>Information &amp; contact</span> </label> </div> <div class="print-out-form__checkbox-row"> <input type="checkbox" checked="checked" name="participants" class="reloadTable sections" id="participants" onclick="clearPrintOutError();"> <label for="participants"> <span>Participants</span> </label> </div> <div class="print-out-form__checkbox-row" > <span>Results:</span> </div> <div class="print-out-form__checkbox-row _second-level"> <input type="checkbox" checked="checked" name="resultSections" class="reloadTable" id="result_section_0" value="4173" onclick="clearPrintOutError();"> <label for="result_section_0"> <span>CCTF-K001.UTC</span> </label> </div> <div class="print-out-form__btn-row"> <button onclick="printOutSubmit(); return false;" class="print-out-form__btn cmc-button submit">OK</button> </div> </div> </div> </div> </section> <section class="container tab-section" id="equivalenceStatementTab" > <div class="tab-section__left-sidebar sticky" id="selectSection"> <div class="information-list-wrap"> <div> <div class="tab-top__filter__wrapper"> <a class="mob-filter-btn" href="#">Comparison</a> <div class="mod-title mob-wrapper"> Comparison <a class="mob-close" href="#">close</a> </div> <div class="filter-wrapper mob-wrapper"> <div class="tab-top__filter__item"> <div class="filter__item__title">Results</div> <div class="filter__item__wrapper"> <ul id="sectionList" class="information-list"> <li id="section-id-4173"> <a href="#tabsPage" onclick="sectionDetailTabsView.selectSection(&#39;4173&#39;)">CCTF-K001.UTC</a> </li> </ul> </div> </div> </div> </div> </div> </div> </div> <div class="tab-section__content" id="tab-section-4173"> <div class="tab-section__content-heading tab-section__content-heading_description-tabs"> <div class="tab-section__title"></div> <div class="tab-btn__wrapper"> <a class="tab-btn print-out" href="#print-out-popup"> <img src="/kcdb/static/icons/print-out-26b37ecfd24015b0ce7c6017c52bb708.svg" alt=""> <span>print out</span> </a> </div> </div> <div class="info-block js-block-content"> <div class="result-description"><p>The key comparison reference value of the key comparison CCTF-K001.UTC is <span style="color:#c0392b;"><strong>UTC</strong></span>, as decided by the CCTF at its 15th meeting held in 2001.The degree of equivalence of each laboratory k with respect to the key comparison reference value is given by a pair of terms both expressed in ns:<br /> <strong><em>D<sub>k</sub></em> = [<em>UTC</em> - <em>UTC </em>(<em>k</em>)]</strong>, where <strong><em>UTC </em>(<em>k</em>)</strong> is the local representation of UTC maintained by laboratory <strong><em>k</em></strong>, and <em><strong>U<sub>k</sub></strong></em>, the expanded uncertainty (coverage factor equal to 2), of <strong><em>D<sub>k</sub></em></strong>.<br />  <br /> The KCDB gives access to the degrees of equivalence for the last 12 months.<br /> <br /> <em><strong>U<sub>k</sub> </strong></em><strong>= 2</strong><em><strong>u<sub>k</sub></strong></em> where <em><strong>u<sub>k</sub></strong></em> is the combined standard uncertainty of <strong>[<em>UTC </em>-<em> UTC </em>(<em>k</em>)]</strong>.<br /> <strong><em>U<sub>k</sub></em></strong><sub> </sub>does not include the prediction component due to the delay of publication of <strong>[<em>UTC</em> ‑ <em>UTC </em>(<em>k</em>)]</strong>.<br /> The <em><strong>u<sub>k</sub></strong></em><sub> </sub>values are valid for the whole month of calculation.</p> </div> </div> </div> </section> <section class="container tab-section" id="laboratoryMeasurementTab"> <div class="tab-section__left-sidebar sticky" id="selectSection"> <div class="information-list-wrap"> <div> <div class="tab-top__filter__wrapper"> <a class="mob-filter-btn" href="#">Comparison</a> <div class="mod-title mob-wrapper"> Comparison <a class="mob-close" href="#">close</a> </div> <div class="filter-wrapper mob-wrapper"> <div class="tab-top__filter__item"> <div class="filter__item__title">Results</div> <div class="filter__item__wrapper"> <ul id="sectionList" class="information-list"> <li id="section-id-4173"> <a href="#tabsPage" onclick="sectionDetailTabsView.selectSection(&#39;4173&#39;)">CCTF-K001.UTC</a> </li> </ul> </div> </div> </div> </div> </div> </div> </div> <div class="tab-section__content" id="tab-section-4173"> <div class="tab-section__content-heading tab-section__content-heading_description-tabs"> <div class="tab-section__title"></div> <div class="tab-btn__wrapper"> <a class="tab-btn print-out" href="#print-out-popup"> <img src="/kcdb/static/icons/print-out-26b37ecfd24015b0ce7c6017c52bb708.svg" alt=""> <span>print out</span> </a> </div> </div> <div class="info-block js-block-content"> <div class="result-description"><p><span class="standard_12px">No Laboratory Individual Measurements are available from the KCDB for this comparison.</span></p> <p> </p> <p> </p> </div> </div> </div> </section> </section> <footer class="ds-footer"> <section class="footer-section clearfix"> <div class="footer-section__top-section" id="accordion"> <div class="container"> <div class="row"> <div class="col-lg-12 col-md-12 col-sm-12 col-xs-12 clearfix corection"> <div class="footer-section__top-section--wrapper"> <h3 class="footer-section__top-section--wrapper__title">KCDB</h3> <ul class="footer-section__top-section--column"> <li class="footer-section__top-section--item"> <a class="footer-section__top-section--item-link" href="https://www.bipm.org/en/about-us/what-is-kcdb.html" target="_blank" >What is the KCDB</a> </li> <li class="footer-section__top-section--item"> <a class="footer-section__top-section--item-link" href="https://www.bipm.org/en/about-us/kcdb-help.html" target="_blank" >Help on the KCDB</a> </li> <li 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Please reset your password via \u201CRecover password\u201D", buttonText: "OK" }); } return false; }); }); function checkPassword(password) { return /^(?=.*[0-9])(?=.*[A-Z])(?=.*[!@#$%^&*?<>~])[a-zA-Z0-9!@#$%&*?<>~]{10,}$/.test(password); } </script> </form> </div> </div> </footer> <script> var sectionDetailTabsView = new ResultSectionDetailViewTabsService([{"id":4173,"comparisonId":735,"name":"CCTF-K001.UTC","description":"<br data-cke-eol=\"1\">CCTF-K001.UTC","degreesBlocks":[{"id":4645,"sectionId":4173,"mode":2,"descriptionBeforeTable":null,"descriptionAfterTable":null,"descriptionAfterGraph":null,"descriptionBeforeGraph":null,"descriptionDegrees":"<p>Degrees of equivalence <strong><em>D<sub>k<\/sub><\/em> = [<em>UTC <\/em>-<em> UTC\u0026nbsp;<\/em>(<em>k<\/em>)] <\/strong>and associated expanded uncertainty <strong><em>U<sub>k<\/sub><\/em> <\/strong>for <a href=\"https:\/\/www.bipm.org\/documents\/d\/guest\/cctf-k001-utc_2401\" target=\"_blank\">January 2024<\/a><\/p>\n\n<p>Degrees of equivalence <strong><em>D<sub>k<\/sub><\/em> = [<em>UTC<\/em> - <em>UTC<\/em>\u0026nbsp;(<em>k<\/em>)] <\/strong>and associated expanded uncertainty <em><strong>U<sub>k<\/sub> <\/strong><\/em>for\u0026nbsp;<a href=\"https:\/\/www.bipm.org\/documents\/d\/guest\/cctf-k001-utc_2402\" target=\"_blank\">February 2024<\/a><\/p>\n\n<p>Degrees of equivalence <strong><em>D<sub>k<\/sub><\/em> = [<em>UTC<\/em> - <em>UTC<\/em>\u0026nbsp;(<em>k<\/em>)]<\/strong> and associated expanded uncertainty <em><strong>U<sub>k<\/sub><\/strong><\/em> for <a href=\"https:\/\/www.bipm.org\/documents\/d\/guest\/cctf-k001-utc_2403\" target=\"_blank\">March 2024<\/a><\/p>\n\n<p>Degrees of equivalence <strong><em>D<sub>k<\/sub><\/em> = [<em>UTC<\/em> - <em>UTC<\/em>\u0026nbsp;(<em>k<\/em>)] <\/strong>and associated expanded uncertainty <em><strong>U<sub>k<\/sub><\/strong><\/em><sub> <\/sub>for <a href=\"https:\/\/www.bipm.org\/documents\/d\/guest\/cctf-k001-utc_2404\" target=\"_blank\">April 2024<\/a><\/p>\n\n<p><span class=\"standard_12px\">Degrees of equivalence <strong><em>D<sub>k<\/sub><\/em> = [<em>UTC<\/em> - <em>UTC\u0026nbsp;<\/em>(<em>k<\/em>)] <\/strong>and associated expanded uncertainty <em><strong>U<sub>k<\/sub><\/strong><\/em> for <a class=\"bleu_12px\" href=\"https:\/\/www.bipm.org\/documents\/d\/guest\/cctf-k001-utc_2405\" target=\"_blank\">May 2024<\/a><\/span><\/p>\n\n<p><span class=\"standard_12px\">Degrees of equivalence <strong><em>D<sub>k<\/sub><\/em> = [<em>UTC<\/em> - <em>UTC\u0026nbsp;<\/em>(<em>k<\/em>)] <\/strong>and associated expanded uncertainty <em><strong>U<sub>k<\/sub><\/strong><\/em> for <a class=\"bleu_12px\" href=\"https:\/\/www.bipm.org\/documents\/d\/guest\/cctf-k001-utc_2406\" target=\"_blank\">June 2024<\/a><\/span><\/p>\n\n<p><span class=\"standard_12px\">Degrees of equivalence <strong><em>D<sub>k<\/sub><\/em> = [<em>UTC<\/em> - <em>UTC\u0026nbsp;<\/em>(<em>k<\/em>)] <\/strong>and associated expanded uncertainty <em><strong>U<sub>k<\/sub><\/strong><\/em> for <a href=\"https:\/\/www.bipm.org\/documents\/d\/guest\/cctf-k001-utc_2407\" target=\"_blank\">July 2024<\/a><\/span><\/p>\n\n<p><span class=\"standard_12px\">Degrees of equivalence <strong><em>D<sub>k<\/sub><\/em> = [<em>UTC<\/em> - <em>UTC\u0026nbsp;<\/em>(<em>k<\/em>)] <\/strong>and associated expanded uncertainty <em><strong>U<sub>k<\/sub><\/strong><\/em> for <a href=\"https:\/\/www.bipm.org\/documents\/d\/guest\/cctf-k001-utc_2408\" target=\"_blank\">August 2024<\/a><\/span><\/p>\n\n<p><span class=\"standard_12px\">Degrees of equivalence <strong><em>D<sub>k<\/sub><\/em> = [<em>UTC<\/em> - <em>UTC\u0026nbsp;<\/em>(<em>k<\/em>)] <\/strong>and associated expanded uncertainty <em><strong>U<sub>k<\/sub><\/strong><\/em> for <a class=\"bleu_12px\" href=\"https:\/\/www.bipm.org\/documents\/d\/guest\/cctf-k001-utc_2409\" target=\"_blank\">September 2024<\/a><\/span><\/p>\n\n<p><span class=\"standard_12px\">Degrees of equivalence <strong><em>D<sub>k<\/sub><\/em> = [<em>UTC<\/em> - <em>UTC\u0026nbsp;<\/em>(<em>k<\/em>)] <\/strong>and associated expanded uncertainty <em><strong>U<sub>k<\/sub><\/strong><\/em> for <a class=\"bleu_12px\" href=\"https:\/\/www.bipm.org\/documents\/d\/guest\/cctf-k001-utc_2410\" target=\"_blank\">October 2024<\/a><\/span><\/p>\n\n<p><span class=\"standard_12px\">Degrees of equivalence <strong><em>D<sub>k<\/sub><\/em> = [<em>UTC<\/em> - <em>UTC\u0026nbsp;<\/em>(<em>k<\/em>)] <\/strong>and associated expanded uncertainty <em><strong>U<sub>k<\/sub><\/strong><\/em> for <a href=\"https:\/\/www.bipm.org\/documents\/d\/guest\/cctf-k001-utc_2411\" target=\"_blank\">November 2024<\/a><\/span><\/p>\n\n<p><span class=\"standard_12px\">Degrees of equivalence <strong><em>D<sub>k<\/sub><\/em> = [<em>UTC<\/em> - <em>UTC\u0026nbsp;<\/em>(<em>k<\/em>)] <\/strong>and associated expanded uncertainty <em><strong>U<sub>k<\/sub><\/strong><\/em> for <a href=\"https:\/\/https:\/\/www.bipm.org\/documents\/d\/guest\/cctf-k001-utc_2412\" target=\"_blank\">December 2024<\/a><\/span><\/p>\n\n<p>Degrees of equivalence <strong><em>D<sub>k<\/sub><\/em> = [<em>UTC <\/em>-<em> UTC\u0026nbsp;<\/em>(<em>k<\/em>)] <\/strong>and associated expanded uncertainty <strong><em>U<sub>k<\/sub><\/em> <\/strong>for <a href=\"https:\/\/www.bipm.org\/documents\/d\/guest\/cctf-k001-utc_2501\" target=\"_blank\">January 2025<\/a><\/p>\n","descriptionGraph":"<p>No graphs of equivalence are included in the KCDB for this comparison.<\/p>\n","unit":null,"dataFileName":null,"dataRows":[],"numericFormat":null,"xlegend":null,"ylegend":null}],"statements":[{"id":4175,"description":"<p>The key comparison reference value\u0026nbsp;of the key comparison CCTF-K001.UTC is <span style=\"color:#c0392b;\"><strong>UTC<\/strong><\/span>, as decided by the CCTF at its 15th meeting held in 2001.The degree of equivalence of each laboratory\u0026nbsp;k\u0026nbsp;with respect to the key comparison reference value is given by a pair of terms both expressed in ns:<br \/>\n<strong><em>D<sub>k<\/sub><\/em>\u0026nbsp;= [<em>UTC<\/em>\u0026nbsp;-\u0026nbsp;<em>UTC\u0026nbsp;<\/em>(<em>k<\/em>)]<\/strong>, where\u0026nbsp;<strong><em>UTC\u0026nbsp;<\/em>(<em>k<\/em>)<\/strong>\u0026nbsp;is the local representation of\u0026nbsp;UTC\u0026nbsp;maintained by laboratory\u0026nbsp;<strong><em>k<\/em><\/strong>,\u0026nbsp;and\u0026nbsp;<em><strong>U<sub>k<\/sub><\/strong><\/em>, the expanded uncertainty (coverage factor equal to 2), of\u0026nbsp;<strong><em>D<sub>k<\/sub><\/em><\/strong>.<br \/>\n\u0026nbsp;<br \/>\nThe KCDB gives access to the degrees of equivalence for the last 12 months.<br \/>\n<br \/>\n<em><strong>U<sub>k<\/sub>\u0026nbsp;<\/strong><\/em><strong>= 2<\/strong><em><strong>u<sub>k<\/sub><\/strong><\/em>\u0026nbsp;where\u0026nbsp;<em><strong>u<sub>k<\/sub><\/strong><\/em>\u0026nbsp;is the combined standard uncertainty 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