OOIR: Observatory of International Research

Papers

(The TQCC of Metrologia is 2. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-08-01 to 2025-08-01.)

Article	Citations
Calibration of gauge blocks by optical interferometry comparison - final report	79
SIM Thermocouple Type S Supplementary Comparison	31
Report on EURAMET supplementary comparison on measurement of a 1 mm stage micrometer	28
Adoption of ICRU report 90 recommendations in the Canadian Co-60 air-kerma primary standard	21
Measurement of melting and freezing temperature of iron using radiation thermometry	20
Report of the CCRI(II) supplementary international comparison of measurement of activity per unit mass of Cs-134 and Cs-137 in wheat flour (CCRI(II)-S13)	20
Corrigendum: Detection and identification of faults in clock ensembles with the generalized likelihood ratio test (2022 Metrologia 59 045010)	17
SIM supplementary comparison on calibration of conventional mass of a 20 kg weight	16
Key comparison CCQM-K179 - polar analyte in solid organic material: mass fraction of oxytetracycline hydrochloride salt	16
Final report of the supplementary comparison between NIMT and LNE on pressure standards in the range 50 MPa to 500 MPa of hydraulic gauge pressure	16
Update of the BIPM comparison BIPM.RI(II)-K1.Ga-67 of activity measurements of the radionuclide ⁶⁷Ga to include the 2023 result of the CMI (Czechia)	15
Absolute frequency measurement of a Lu⁺ (³D₁) optical frequency standard via link to international atomic time	14
Comparison of calibration of multimeter	14
Final report, ongoing key comparison BIPM.QM-K1, ozone at ambient level, comparison with EMPA, June 2023	14
Final report on the EURAMET key comparison EURAMET AUV.V-K5	14
Final Report on key comparison EURAMET.M.P K4.2020 in the range from 1 Pa to 15 kPa of absolute and gauge pressure	13
Key comparison BIPM.RI(I)-K2 of the air-kerma standards of the BFKH, Hungary, and the BIPM in low-energy x-rays	13
Final report of CCQM-K96.2023: assay of potassium dichromate	13
Comparison between four integer ambiguity resolved PPP GNSS time transfer software solutions	13
Report on comparison EURAMET.M.M-S10 (comparison of sub-multiples of the kilogram)	13
Bilateral Comparison of 1.018 V and 10 V Standards between the SMD (Belgium) and the BIPM, October to December 2021 (part of the ongoing BIPM key comparison BIPM.EM-K11)	12
Final report of APMP.AUV.V-S1: supplementary comparison on calibration of laser tachometers using mechanical generators	12
Detection and identification of faults in clock ensembles with the generalized likelihood ratio test	12
Update of the BIPM comparison BIPM.RI(II)-K1.Sn-113 of activity measurements of the radionuclide ¹¹³Sn to include the 2017 result of the LNE-LNHB (France)	12
CCQM-K68.2019, nitrous oxide (N₂O) in air, ambient level, final report	12

Bilateral comparison of 1 Ω and 10 kΩ standards (ongoing BIPM key comparison BIPM.EM-K13) between the NPLI (India) and the BIPM	12
Characterization of the LED filament lamp for luminous intensity calibration	11
Comparison of low air speed facilities	11
NTSC SrII optical lattice clock with uncertainty of 2	11
Relating SI units to the ‘defining constants’	11
APMP key comparison of AC-DC current transfer standards: final report	11
CIPM key comparison of viscosity CCM.V-K4	11
Discussion on the calculation of the uncertainties of [UTC-UTC(k)]	10
Key comparison BIPM.RI(I)-K7 of the air-kerma standards of the BFKH, Hungary, and the BIPM in mammography x-rays	10
High precision roundness measurement by error separation techniques (EURAMET.L-S30)	10
Key comparison BIPM.RI(I)-K5 of the air-kerma standards of the GUM, Poland and the BIPM in ¹³⁷Cs gamma radiation	10
Corrigendum: Uncertainty of the measurement of the frequency dependence of four-terminal pair capacitance with a four-channel vector network analyzer (2025 Metrologia 62 025011)	10
The irony of the magnet system for Kibble balances—a review	10
Report on the APMP key comparison of hydrometer calibrations APMP.M.D-K4	10
ITS-90 reproducibility, xenon fixed point substitution and new interpolating equations between 13.8033 K and 273.16 K	9
EURAMET.M.FF-S13 final report	9
Determining the calibration factor of Rn-220 by low-pressure scintillation cell	9
Comparison of blackbody for clinical infrared ear thermometers	8
Autocollimators: plane angle measurand ambiguities and the impact of surface form	8
Economic optimization of acceptance interval in conformity assessment: 1. Process with no systematic effect	8
Comparison in dynamic primary calibration of digital-output accelerometer between CEM and PTB	8
Series connection of quantum Hall resistance array and programmable Josephson voltage standard for current generation at one microampere	8
CCM.G-K2.2023: CIPM key comparison of absolute gravimeters	8
Final report on the supplementary comparison EURAMET.AUV.V-S2	7
The forgotten (?) potentiometric method in thermometry	7
Key comparison CCQM-K148.b - polar analyte in solid organic material: mass fraction of oxytetracycline	7
Final report on key comparison APMP.M.P-K7.2 in hydraulic gauge pressure from 10 MPa to 100 MPa	7
Machine learning based priors for Bayesian inversion in MR imaging	7
High polarity analyte(s) in aqueous media: Determination of L-PFOA and L-PFOS in ground water	7
A proposal for three categories of units within the SI	6
Traceable characterisation of fibre-coupled single-photon detectors	6
Report on APMP key comparison: calibration of line scale (APMP.L-K7)	6
The unusual status of the hectare in the SI	6
Gas viscosities from a semiconductor-manufacturing mass-flow controller	6
Measurement model of circadian action factor of phosphor-converted white LEDs based on photometric, electrical, and thermal properties	6
Final report for CCQM-P212: coherence of carbon isotope delta reference materials	6
Achievement of 0.005% combined transfer uncertainties in the NIST detector calibration facility	6
Phase shifting angle interferometer	6
Dual-mode room temperature self-calibrating photodiodes approaching cryogenic radiometer uncertainty	6
Ambient humidity, the overlooked influencer of radioactivity measurements	5
A new interpolation equation in the ITS-90 subrange from the triple point of water to the freezing point of indium	5
Evaluation of the transportable atom gravimeter HUST-QG	5
Key comparison COOMET.QM-K120 "Carbon dioxide in air at urban level (480–800) μmol/mol"	5
AFRIMETS.AUV.A-S2 final report, calibration of a multi-function acoustic calibrator	5
Accurate density measurement of a small solid sample using a combination of hydrostatic weighing and pressure-of-flotation methods	5
Final report, ongoing key comparison BIPM.QM-K1, ozone at ambient level, comparison with NIST, July 2022	5
Power of a test for assessing interlaboratory consensus of nominal and ordinal characteristics of a substance, material, or object	5
Update of the BIPM comparison BIPM.RI(II)-K1.Co-57 of activity measurements of the radionuclide ⁵⁷Co to include the 2023 result of the BEV (Austria)	5
Bilateral comparison of 10 pF and 100 pF standards (ongoing BIPM key comparisons BIPM.EM-K14.a and 14.b) between the NMIM (Malaysia) and the BIPM	5
Final report on the CCM key comparison of kilogram realizations CCM.M-K8.2021	5

Accurate characterisation of optical diffuse transmission—primary facility and extension to translucent samples	5
Key comparison BIPM.RI(I)-K4 of the absorbed dose to water standards of the NMIJ, Japan, and the BIPM in ⁶⁰Co gamma radiation	5
Pilot study CCQM-P172 – spectroscopic methods for HNO₃ value assignment	5
Erratum: Metrological characterization of a commercial single-photon source with high photon flux emission (2024 Metrologia 61 054001)	5
Key comparison CCEM.RF-K27.W of RF power from 50 GHz to 75 GHz in rectangular waveguide	5
Linkage for Metrosert to CCT-K9 via the EURAMET-T.K9.1 bilateral comparison	5
Room temperature dual-mode internal quantum deficiency measurement with propagated uncertainty to 0.03% (k = 2)	5
Bilateral comparison in torque transducer calibration between CENAM, Mexico and CEM, Spain, SIM.M.T-S1	5
Precise high resistance comparison between the NMIJ traveling dual source bridge and the NIST adapted Wheatstone bridge	5
Measurement science meets the reproducibility challenge	5
International comparison CCQM-K165: dimethyl sulfide in nitrogen at 5 nmol mol^-1	5
Continuous GPS PPP-AR frequency transfer links	5
Multi-taper-based automatic correction of non-anechoic antenna measurements	5
Precision control of resistive power in Kibble balance coils: an advanced method for minimizing temperature-related magnetic errors	4
The new mise en pratique for the metre—a review of approaches for the practical realization of traceable length metrology from 10⁻¹¹ m to 10¹³ m	4
Bilateral comparison of 1.018 V and 10 V standards between CSIR-NPL (India) and the BIPM, April to June 2022 (part of the ongoing BIPM key comparison BIPM.EM-K11.a and b)	4
Final report on EURAMET key comparison EURAMET.M.D-K2.2 (1523)	4
Supplementary comparison for the traceability of AC high voltage reference measuring systems up to 200 kV (EURAMET.EM-S33)	4
Key comparison BIPM.RI(I)-K8 of high dose-rate ¹⁹²Ir brachytherapy standards for reference air kerma rate of the NIM and the BIPM	4
Comparison of PLTS-2000 and the magnetic field fluctuation thermometer at LNE-Cnam	4
Activity measurements of the radionuclides ^99mTc, ¹⁸F and ⁶⁴Cu for the POLATOM, Poland, in the ongoing comparisons BIPM.RI(II)-K4 series and KCRV update in the corres	4
Calibration of GNSS stations for UTC	4
A proposal to change the leap-second adjustments to coordinated universal time	4
Comparison BIPM.RI(I)-K6 of the standards for absorbed dose to water of the NRC, Canada and the BIPM in accelerator photon beams	4
International comparison CCQM-K3.2019 automotive exhaust gases	4
Final report on the APMP regional comparison of type R thermocouples calibration at Cu, Co-C and Pd fixed points, APMP.T-S16	4
Corrigendum: Refractive index gas thermometry between 13.8 K and 161.4 K (2021 Metrologia 58 025008)	4
Continuous IPPP links for UTC	4
First evaluation of the primary frequency standard NTSC-CsF2	4
Final report, On-going Key Comparison BIPM.QM-K1, Ozone at ambient level, comparison with NIM Oct.2023	4
Key comparison study - organic solvent calibration solution - gravimetric preparation and value assignment of deoxynivalenol (DON) in acetonitrile (ACN)	4
APMP key comparison of luminous intensity (APMP.PR-K3.a): final report	4
CCQM-P206, nitrous oxide (N₂O) in air, ambient level, pilot study run in parallel with CCQM-K68.2019	4
Automatic alignment technique for the suspended coil in the joule balance	4
Gonioreflectometer for measuring 3D spectral BRDF of horizontally aligned samples with traceability to SI	4
Precision measurement of an electron pump at 2 GHz; the frontier of small DC current metrology	4
Bilateral comparison of irradiance scales between PMOD/WRC and PTB for longwave downward radiation measurements	3
Key comparison BIPM.RI(I)-K2 of the air-kerma standards of the GUM, Poland, and the BIPM in low-energy x-rays	3
Final report of CCQM-P204, comparison on CO₂ isotope ratios in pure CO₂	3
Comparison of standards for the calibration of stopwatches	3
Analysis of reproducibility by using inclusive and exclusive statistics in the framework of a bilateral comparison	3
Observation of systematic deviations between Faraday cup aerosol electrometers for varying particle sizes and flow rates—results of the AEROMET FCAE workshop	3
Activity measurements of the radionuclides ¹⁸F, ⁶⁴Cu and ^99mTc for the ANSTO, Australia, in the ongoing comparisons BIPM.RI(II)-K4 series and KCRV update in the corre	3
A two-capillary viscometer for temperatures up to 473 K and pressures up to 100 MPa—operation and verification at low pressure	3
AFRIMETS supplementary comparison on pin gauges	3
Comment on ‘On the dimension of angles and their units’	3
Advancements in the NRC-FCs2 primary frequency standard	3
Comparison of methods to determine the fluence of monoenergetic neutrons in the energy range from 30 keV to 14.8 MeV	3
Key comparison study on peptide purity - glycated hexapeptide of HbA1c	3
A constant pressure flowmeter for extreme-high vacuum	3
Primary standard for traceability in low liquid hydrocarbon fuel flow rates	3
Key comparison BIPM.RI(I)-K5 of the air-kerma standards of the BEV, Austria and the BIPM in ¹³⁷Cs gamma radiation	3
Report on the AFRIMETS.M. F-S1 supplementary force comparison for 10 kN and 100 kN	3
GPS PPP-AR frequency transfer and its application for comparing atomic fountain primary frequency standards between NRC and PTB	3
Developing calibration and measurement capabilities for atmospheric CH₄ stable isotope ratios at NMIs/DIs: metrology for global comparability	3
Key comparison BIPM.RI(I)-K1 of the air-kerma standards of the KRISS, Republic of Korea and the BIPM in ⁶⁰Co gamma radiation	3
Key comparisons of air kerma and absorbed dose to water standards in ⁶⁰Co radiation beam (EURAMET.RI(I)-K1.3 and EURAMET.RI(I)-K4.3)	3
Final report, ongoing key comparison BIPM.QM-K1, ozone at ambient level, comparison with CMS/ITRI, March 2024	3
Bilateral supplementary comparison of high voltage transformer measuring systems	3
An assessment of the ageing of the absolute spectral responsivity of trap detectors at krypton ion laser emission wavelengths	3
Torque euramet supplementary comparison EURAMET.M.T-S4 (Euramet Project 1304) from 0.1 N·m to 5 N·m and from 5 N·m to 50 N·m	3
Final report, ongoing key comparison BIPM.QM-K1, ozone at ambient level, comparison with INRIM, February 2022	3
Phase-stepping interferometry for parallelism measurement of step gauge faces	3
CIPM key comparison CCPR-K1.a.2017 for spectral irradiance 250 nm to 2500 nm. Final report	3
Report of the comparison BIPM.QM-K2.b, on carbon dioxide in nitrogen at ambient levels, with E+ E Elektronik (2025)	3
Assay of sodium carbonate	3
Comparison report between NIM and CMS of the ITS-90 realization at the triple point of argon	3
Final report of CCQM-K96.2023.1: assay of potassium dichromate	3
Comparison of primary standards for liquid flow - flow range (0.1 to 10) µL/min	3
Method to traceably determine the refractive index by measuring the angle of minimum deviation	3
Report on the key comparison, CCM.F-K23 in force at 200 N and 500 N	3
Long-term stability of molecular doped epigraphene quantum Hall standards: single elements and large arrays (R _K/236 ≈ 109 Ω)	3
Calibration of an ionisation chamber for parent–progeny decay	3
Final report of CCQM-K157 for the measurement of the amount of substance of HfO₂ expressed as the thickness of nm films	3
Calibration of a step gauge (APMP.L-K5.n01)	3
Measurement of average mass attenuation coefficient of air for ¹³⁷Cs gamma-ray irradiation beam	3
New impedance bridge at LNE for the two terminal-pair AC resistor calibration up to 20 kHz	3
Practical realisation of the kelvin by Johnson noise thermometry	3
Bilateral key comparison EURAMET.EM-K11.1 "AC-DC Voltage Transfer Difference at Low Voltages"	3
A Bayesian statistical method for large-scale MEMS-based sensors calibration: a case study on 100 digital accelerometers	3

Characterization of the collisional frequency shift in an atomic fountain clock using absorption imaging	2
EURAMET supplementary comparison EURAMET.L-S26.1, measurement of groove depth standards in the range 5 μm up to 0.9 mm	2
Supplementary comparisons of national standards of ratio error and phase displacement of AC voltage of power frequency COOMET 411/RU-a/07 (COOMET.EM-S6)	2
Thermodynamic effects in a gas modulated Invar-based dual Fabry–Pérot cavity refractometer	2
The isotopic composition of the new enriched silicon crystal Si28-31Pr11: maintaining the realization and dissemination of the mole and the kilogram via the XRCD method	2
Comparison BIPM.RI(I)-K6 of the standards for absorbed dose to water of the ARPANSA, Australia, and the BIPM in accelerator photon beams	2
A three-cornered hat analysis of instabilities in two-way and GPS carrier phase time transfer systems	2
Traceable spectral interferometry for length measurement	2
SIM.T-K9.3: Standard platinum resistance thermometer ITS-90 realizations from the Hg triple point to the Zn freezing point	2
APMP supplementary international comparison of activity measurement of Cs-134 and Cs-137 in brown rice	2
AFRIMETS supplementary comparison on calibration of dial gauge	2
Final report "Key comparison CCM.FF-K1.2015 - water flow: 30 m³/h ... 200 m³/h"	2
Calibration of the microphone sensitivity below 0.5 Hz using the liquid-column-type sound pressure generator	2
Final report on GULFMET supplementary comparison of high current transformer measuring systems (GULFMET.EM-S7)	2
Speed of sound measurements and derived third and fourth acoustic virial coefficients of supercritical neon	2
Comparison of partial discharge (PD) calibrators from 0.1 pC to 10 nC	2
Speedy in-situ magnetic field compensation algorithm for multiple-channel single-beam SERF atomic magnetometers	2
Supplementary comparison CCRI(I)-S3 of standards for absorbed dose to water in ⁶⁰Co gamma radiation at radiation processing dose levels	2
Final report, on-going key comparison BIPM.QM-K1, ozone at ambient level, comparison with NIMT, September 2022	2
Final report on CCQM-K167: carbon isotope delta measurements of vanillin	2
Subsequent bilateral key comparison study - organic solvent calibration solution - gravimetric preparation and value assignment of aflatoxin B1 (AfB1) in acetonitrile (ACN)	2
Repeatability of a primary thermometer and calibration of resistance thermometers between 5 K and 25 K	2
Extension to the range of prefixes for binary multiples	2
Bilateral comparison of 1.018 V and 10 V standards between DEFNAT (Tunisia) and the BIPM, April to June 2022 (part of the ongoing BIPM key comparison BIPM.EM-K11.a and b)	2
Update of the BIPM comparison BIPM.RI(II)-K1.Ba-133 of activity measurements of the radionuclide ¹³³Ba to include the 2016 result of the NRC (Canada), the 2018 result of the TENMAK-NÜKEN (T	2
ITS-90 SPRT calibration from the Ar TP to the Zn FP	2
High polarity analyte(s) in aqueous media: determination of L-PFOA and L-PFOS in ground water	2
Phase transition behavior of pure Fe cells for thermocouple calibration	2
PAWG pilot study on quantification of total haemoglobin in blood	2
Evaluation of the relativistic redshift in frequency standards at KRISS	2
A test of measurement results with increased sensitivity to inconsistency	2
A bilateral comparison of NIST and PTB laser power standards for scale realization confidence by gravitational wave observatories	2
Measurement of bidirectional transmittance distribution function in the visible and near-infrared spectral range	2
Bilateral comparison of 1.018 V and 10 V standards between INRIM (Italy) and the BIPM, November to December 2023 (part of the ongoing BIPM key comparison BIPM.EM-K11.a and b)	2
International comparison CCQM-P229 pilot study to measure line intensities of selected ¹²C¹⁶O transitions	2
Final report on key comparison APMP.AUV.A-K5	2
Report of subsequent key comparison CCQM - K73.2018.2 amount content of H+ in hydrochloric acid (0.1 mol/kg-1)	2
On modelling of artefact instability in interlaboratory comparisons	2
Primary calibration for airborne infrasound utilizing the vertical gradient of the ambient pressure	2
EURAMET.T-K9 regional key comparison ITS-90 SPRT calibration from the Ar TP to the Zn FP	2
Absolute frequency measurement of the ⁸⁷Sr optical lattice clock at NTSC using international atomic time	2
Characterization of laser-pumped Cs-⁴He atomic magnetometer	2
Elements in lipstick material	2
Update of the BIPM comparison BIPM.RI(II)-K1.Tl-201 of activity measurements of the radionuclide ²⁰¹Tl to include the 2011 result of the NIST (United States)	2
Reply to Comment on ‘On the dimension of angles and their units’	2
APMP.QM-S19: Toxic elements in seafood	2
Iodine frequency-stabilized HeNe laser amplified by injection locking of a semiconductor laser diode	2
CCQM-K158 elements and inorganic arsenic in rice flour	2
Supplementary comparison of the measurement of the alpha and beta particle surface emission rates from large area sources (CCRI(II)-S10 LASCE)	2
Calibration of angle standards	2
Noise-induced servo errors in optical clocks utilizing Rabi interrogation	2
CCQM-K176 breast cancer biomarker HER2 copy number variation (CNV) measurement	2