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 2021-05-01 to 2025-05-01.)

Article	Citations
Final report on the EURAMET key comparison EURAMET AUV.V-K5	65
Calibration of gauge blocks by optical interferometry comparison - final report	29
SIM Thermocouple Type S Supplementary Comparison	26
Adoption of ICRU report 90 recommendations in the Canadian Co-60 air-kerma primary standard	18
Report on EURAMET supplementary comparison on measurement of a 1 mm stage micrometer	18
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)	17
Corrigendum: Detection and identification of faults in clock ensembles with the generalized likelihood ratio test (2022 Metrologia 59 045010)	16
Measurement of melting and freezing temperature of iron using radiation thermometry	16
Key comparison CCQM-K179 - polar analyte in solid organic material: mass fraction of oxytetracycline hydrochloride salt	15
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
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	15
Final report, ongoing key comparison BIPM.QM-K1, ozone at ambient level, comparison with EMPA, June 2023	14
Comparison between four integer ambiguity resolved PPP GNSS time transfer software solutions	14
Relating SI units to the ‘defining constants’	14
Comparison of low air speed facilities	13
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
Acoustic measurement of the triple point of neon T _Ne and thermodynamic calibration of a transfer standard for accurate cryogenic thermometry	13
Report on comparison EURAMET.M.M-S10 (comparison of sub-multiples of the kilogram)	12
Final report of CCQM-K96.2023: assay of potassium dichromate	12
Key comparison BIPM.RI(I)-K2 of the air-kerma standards of the BFKH, Hungary, and the BIPM in low-energy x-rays	12
CIPM key comparison of viscosity CCM.V-K4	12
APMP key comparison of AC-DC current transfer standards: final report	11
Final report of APMP.AUV.V-S1: supplementary comparison on calibration of laser tachometers using mechanical generators	11
CCQM-K68.2019, nitrous oxide (N₂O) in air, ambient level, final report	11
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)	11

Characterization of the LED filament lamp for luminous intensity calibration	11
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)	11
Bilateral comparison of 1 Ω and 10 kΩ standards (ongoing BIPM key comparison BIPM.EM-K13) between the NPLI (India) and the BIPM	11
Detection and identification of faults in clock ensembles with the generalized likelihood ratio test	10
Key comparison BIPM.RI(I)-K7 of the air-kerma standards of the BFKH, Hungary, and the BIPM in mammography x-rays	10
The irony of the magnet system for Kibble balances—a review	10
Discussion on the calculation of the uncertainties of [UTC-UTC(k)]	10
Key comparison BIPM.RI(I)-K5 of the air-kerma standards of the GUM, Poland and the BIPM in ¹³⁷Cs gamma radiation	10
High precision roundness measurement by error separation techniques (EURAMET.L-S30)	10
Series connection of quantum Hall resistance array and programmable Josephson voltage standard for current generation at one microampere	9
Comparison of blackbody for clinical infrared ear thermometers	9
Determining the calibration factor of Rn-220 by low-pressure scintillation cell	9
Comparison in dynamic primary calibration of digital-output accelerometer between CEM and PTB	9
Extrapolation schemes of key comparison results in gas analysis	9
ITS-90 reproducibility, xenon fixed point substitution and new interpolating equations between 13.8033 K and 273.16 K	9
Report on the APMP key comparison of hydrometer calibrations APMP.M.D-K4	9
Economic optimization of acceptance interval in conformity assessment: 1. Process with no systematic effect	9
EURAMET.M.FF-S13 final report	9
Autocollimators: plane angle measurand ambiguities and the impact of surface form	9
Measurement model of circadian action factor of phosphor-converted white LEDs based on photometric, electrical, and thermal properties	8
A metrological approach to quantities that are counted and the unit one	8
Machine learning based priors for Bayesian inversion in MR imaging	8
CCM.G-K2.2023: CIPM key comparison of absolute gravimeters	8
Key comparison CCQM-K148.b - polar analyte in solid organic material: mass fraction of oxytetracycline	8
High polarity analyte(s) in aqueous media: Determination of L-PFOA and L-PFOS in ground water	7
Final report on the supplementary comparison EURAMET.AUV.V-S2	7
The unusual status of the hectare in the SI	7
The forgotten (?) potentiometric method in thermometry	7
Phase shifting angle interferometer	7
Final report for CCQM-P212: coherence of carbon isotope delta reference materials	7
Final report on key comparison APMP.M.P-K7.2 in hydraulic gauge pressure from 10 MPa to 100 MPa	7
Traceable characterisation of fibre-coupled single-photon detectors	7
A proposal for three categories of units within the SI	6
Dual-mode room temperature self-calibrating photodiodes approaching cryogenic radiometer uncertainty	6
A new interpolation equation in the ITS-90 subrange from the triple point of water to the freezing point of indium	6
Linkage for Metrosert to CCT-K9 via the EURAMET-T.K9.1 bilateral comparison	6
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	6
Achievement of 0.005% combined transfer uncertainties in the NIST detector calibration facility	6
Evaluation of the transportable atom gravimeter HUST-QG	6
Ambient humidity, the overlooked influencer of radioactivity measurements	6
Bilateral comparison in torque transducer calibration between CENAM, Mexico and CEM, Spain, SIM.M.T-S1	6
Gas viscosities from a semiconductor-manufacturing mass-flow controller	6
Report on APMP key comparison: calibration of line scale (APMP.L-K7)	6
Room temperature dual-mode internal quantum deficiency measurement with propagated uncertainty to 0.03% (k = 2)	6
Accurate characterisation of optical diffuse transmission—primary facility and extension to translucent samples	6
Key comparison CCEM.RF-K27.W of RF power from 50 GHz to 75 GHz in rectangular waveguide	5
Facility for calibrating anemometers as a function of air velocity vector and turbulence	5
Calibration of GNSS stations for UTC	5
AFRIMETS.AUV.A-S2 final report, calibration of a multi-function acoustic calibrator	5
International comparison CCQM-K165: dimethyl sulfide in nitrogen at 5 nmol mol^-1	5

Multi-taper-based automatic correction of non-anechoic antenna measurements	5
Continuous IPPP links for UTC	5
Final report on the CCM key comparison of kilogram realizations CCM.M-K8.2021	5
Primary thermometry at 4 K, 14 K, and 25 K applying dielectric-constant gas thermometry	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
Accurate density measurement of a small solid sample using a combination of hydrostatic weighing and pressure-of-flotation methods	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
Gonioreflectometer for measuring 3D spectral BRDF of horizontally aligned samples with traceability to SI	5
Final report, ongoing key comparison BIPM.QM-K1, ozone at ambient level, comparison with NIST, July 2022	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
A proposal to change the leap-second adjustments to coordinated universal time	5
Key comparison COOMET.QM-K120 "Carbon dioxide in air at urban level (480–800) μmol/mol"	5
Power of a test for assessing interlaboratory consensus of nominal and ordinal characteristics of a substance, material, or object	5
Final report on EURAMET key comparison EURAMET.M.D-K2.2 (1523)	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
Key comparison study - organic solvent calibration solution - gravimetric preparation and value assignment of deoxynivalenol (DON) in acetonitrile (ACN)	4
First evaluation of the primary frequency standard NTSC-CsF2	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
Primary standard for traceability in low liquid hydrocarbon fuel flow rates	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
Erratum: Metrological characterization of a commercial single-photon source with high photon flux emission (2024 Metrologia 61 054001)	4
Continuous GPS PPP-AR frequency transfer links	4
Bilateral comparison of irradiance scales between PMOD/WRC and PTB for longwave downward radiation measurements	4
A Bayesian statistical method for large-scale MEMS-based sensors calibration: a case study on 100 digital accelerometers	4
APMP key comparison of luminous intensity (APMP.PR-K3.a): final report	4
Final report, On-going Key Comparison BIPM.QM-K1, Ozone at ambient level, comparison with NIM Oct.2023	4
Precision measurement of an electron pump at 2 GHz; the frontier of small DC current metrology	4
Corrigendum: Refractive index gas thermometry between 13.8 K and 161.4 K (2021 Metrologia 58 025008)	4
International comparison CCQM-K3.2019 automotive exhaust gases	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
GPS PPP-AR frequency transfer and its application for comparing atomic fountain primary frequency standards between NRC and PTB	3
Practical realisation of the kelvin by Johnson noise thermometry	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
Advancements in the NRC-FCs2 primary frequency standard	3
Final report "Key comparison CCM.FF-K1.2015 - water flow: 30 m³/h ... 200 m³/h"	3
Bilateral supplementary comparison of high voltage transformer measuring systems	3
Report on the AFRIMETS.M. F-S1 supplementary force comparison for 10 kN and 100 kN	3
CIPM key comparison CCPR-K1.a.2017 for spectral irradiance 250 nm to 2500 nm. Final report	3
Measurement of average mass attenuation coefficient of air for ¹³⁷Cs gamma-ray irradiation beam	3
Remote time and frequency calibration with holdover traceability from a new treatment of non-white noise in rubidium clocks	3
Final report, ongoing key comparison BIPM.QM-K1, ozone at ambient level, comparison with INRIM, February 2022	3
Key comparison BIPM.RI(I)-K8 of high dose-rate ¹⁹²Ir brachytherapy standards for reference air kerma rate of the NIM and the BIPM	3
Supplementary comparison for the traceability of AC high voltage reference measuring systems up to 200 kV (EURAMET.EM-S33)	3
Bilateral key comparison EURAMET.EM-K11.1 "AC-DC Voltage Transfer Difference at Low Voltages"	3
New impedance bridge at LNE for the two terminal-pair AC resistor calibration up to 20 kHz	3
Final report, ongoing key comparison BIPM.QM-K1, ozone at ambient level, comparison with CMS/ITRI, March 2024	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
A two-capillary viscometer for temperatures up to 473 K and pressures up to 100 MPa—operation and verification at low pressure	3
Final report of CCQM-K157 for the measurement of the amount of substance of HfO₂ expressed as the thickness of nm films	3
Comparison report between NIM and CMS of the ITS-90 realization at the triple point of argon	3
Primary calibration system for digital accelerometers	3
CCQM-P206, nitrous oxide (N₂O) in air, ambient level, pilot study run in parallel with CCQM-K68.2019	3
Comment on ‘On the dimension of angles and their units’	3
Key comparison study on peptide purity - glycated hexapeptide of HbA1c	3
Automatic alignment technique for the suspended coil in the joule balance	3
Assay of sodium carbonate	3
Observation of systematic deviations between Faraday cup aerosol electrometers for varying particle sizes and flow rates—results of the AEROMET FCAE workshop	3
Comparison of methods to determine the fluence of monoenergetic neutrons in the energy range from 30 keV to 14.8 MeV	3
Developing Calibration and Measurement Capabilities for Atmospheric CH₄ Stable Isotope Ratios at NMIs/DIs: Metrology for Global Comparability	3
Analysis of reproducibility by using inclusive and exclusive statistics in the framework of a bilateral comparison	3
Calibration of an ionisation chamber for parent–progeny decay	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
Final report of CCQM-P204, comparison on CO₂ isotope ratios in pure CO₂	3
AFRIMETS supplementary comparison on pin gauges	3
Mass fraction assignment of Bisphenol-A high purity material	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
A constant pressure flowmeter for extreme-high vacuum	3
Phase-stepping interferometry for parallelism measurement of step gauge faces	3
Key comparison BIPM.RI(I)-K5 of the air-kerma standards of the BEV, Austria and the BIPM in ¹³⁷Cs gamma radiation	3
Final report on the APMP regional comparison of type R thermocouples calibration at Cu, Co-C and Pd fixed points, APMP.T-S16	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
An assessment of the ageing of the absolute spectral responsivity of trap detectors at krypton ion laser emission wavelengths	3
Comparison of standards for the calibration of stopwatches	3
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
Reply to Comment on ‘On the dimension of angles and their units’	2
Phase transition behavior of pure Fe cells for thermocouple calibration	2

Traceable spectral interferometry for length measurement	2
Elements in lipstick material	2
A bilateral comparison of NIST and PTB laser power standards for scale realization confidence by gravitational wave observatories	2
Repeatability of a primary thermometer and calibration of resistance thermometers between 5 K and 25 K	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
Final report on CCQM-K167: carbon isotope delta measurements of vanillin	2
On modelling of artefact instability in interlaboratory comparisons	2
SIM.T-K9.3: Standard platinum resistance thermometer ITS-90 realizations from the Hg triple point to the Zn freezing point	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
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
CCQM-K176 breast cancer biomarker HER2 copy number variation (CNV) measurement	2
Supplementary comparison CCRI(I)-S3 of standards for absorbed dose to water in ⁶⁰Co gamma radiation at radiation processing dose levels	2
APMP supplementary international comparison of activity measurement of Cs-134 and Cs-137 in brown rice	2
A three-cornered hat analysis of instabilities in two-way and GPS carrier phase time transfer systems	2
Characterization of laser-pumped Cs-⁴He atomic magnetometer	2
APMP.QM-S19: Toxic elements in seafood	2
A test of measurement results with increased sensitivity to inconsistency	2
Calibration of angle standards	2
Speedy in-situ magnetic field compensation algorithm for multiple-channel single-beam SERF atomic magnetometers	2
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
International comparison CCQM-P229 pilot study to measure line intensities of selected ¹²C¹⁶O transitions	2
Iodine frequency-stabilized HeNe laser amplified by injection locking of a semiconductor laser diode	2
Evaluation of the relativistic redshift in frequency standards at KRISS	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
Primary calibration for airborne infrasound utilizing the vertical gradient of the ambient pressure	2
High polarity analyte(s) in aqueous media: determination of L-PFOA and L-PFOS in ground water	2
CCQM-K158 elements and inorganic arsenic in rice flour	2
AFRIMETS supplementary comparison on calibration of dial gauge	2
EURAMET.T-K9 regional key comparison ITS-90 SPRT calibration from the Ar TP to the Zn FP	2
PAWG pilot study on quantification of total haemoglobin in blood	2
Supplementary comparison of the measurement of the alpha and beta particle surface emission rates from large area sources (CCRI(II)-S10 LASCE)	2
Speed of sound measurements and derived third and fourth acoustic virial coefficients of supercritical neon	2
Subsequent bilateral key comparison study - organic solvent calibration solution - gravimetric preparation and value assignment of aflatoxin B1 (AfB1) in acetonitrile (ACN)	2
Calibration of the microphone sensitivity below 0.5 Hz using the liquid-column-type sound pressure generator	2
Final report, on-going key comparison BIPM.QM-K1, ozone at ambient level, comparison with NIMT, September 2022	2
ITS-90 SPRT calibration from the Ar TP to the Zn FP	2
Extension to the range of prefixes for binary multiples	2
Temperature dependence correction method of LED filament lamp for total luminous flux calibration based on voltage measurement	2
Absolute frequency measurement of the ⁸⁷Sr optical lattice clock at NTSC using international atomic time	2
Noise-induced servo errors in optical clocks utilizing Rabi interrogation	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