General References

·       Manual on the WMO Global Integrated Observing System (WMO-No.1160)

·       Guide to the WMO Global Integrated Observing System (WMO-No.1165)

·       Guide to Instruments and Methods of Observation (WMO-No.8)

·       JCGM Publications: Guides in Metrology

·       The International System of Units (SI)

·       BIPM website


Measurement Terminology

·       JCGM 200:2012 International Vocabulary of Metrology (VIM) – Basic and general concepts and associated terms 

·       JCGM 100:2008(E) – Evaluation of measurement data - Guide to the Expression of Uncertainty in Measurement (GUM)

·       ISO 17714:2007 Meteorology — Air temperature measurements 

·       ISO 1087:2019 Terminology work and terminology science — Vocabulary 


Metrology in Meteorology 

·       Guide to Instruments and Methods of Observation (WMO-No.8), Vol. I, Ch.1, Annex 1.C. Regional Instrument Centres

·       Regional Instruments Centres (RICs) website 

·       Guidance on Instrumentation for Calibration Laboratories, including Regional Instrument Centres (IOM Report No. 101)

·       Guide to Instruments and Methods of Observation (WMO-No.8), Vol. I, Ch.1, Annex 1.G. Measurement quality classifications for surface observing stations on land

·      Training Material on Metrology and Calibration (IOM Report No. 86)


Calibration and Measurement Uncertainty

·       JCGM 200:2012-International Vocabulary of Metrology (VIM) - Basic and general concepts and associated terms

·       JCGM 100:2008(E) – Evaluation of measurement data - Guide to the Expression of Uncertainty in Measurement (GUM)

·       Guidance on the computation of calibration uncertainties (IOM Report No. 119)


Calibration of Temperature Instruments

·       Guide to Instruments and Methods of Observation (WMO-No.8), Vol. I, Chapter 2. Measurement of temperature

·       JCGM 200:2012-International Vocabulary of Metrology (VIM) - Basic and general concepts and associated terms 

·        JCGM 100:2008(E) – Evaluation of measurement data - Guide to the Expression of Uncertainty in Measurement (GUM)

·        Guide to the Realization of the ITS-90

·        Guidance on the computation of calibration uncertainties (IOM Report No. 119)

·        Guidance on Instrumentation for Calibration Laboratories, including Regional Instrument Centres (IOM Report No. 101)

·        Training Material on Metrology and Calibration (IOM Report No. 86)


Calibration of Humidity Instruments

·       Guide to Instruments and Methods of Observation (WMO-No.8), Vol. I, Chapter 4. Measurement of humidity

·       JCGM 200:2012-International Vocabulary of Metrology (VIM) - Basic and general concepts and associated terms 

·       JCGM 100:2008(E) – Evaluation of measurement data - Guide to the Expression of Uncertainty in Measurement (GUM)

·       Guidance on the computation of calibration uncertainties (IOM Report No. 119)

·       Guidance on Instrumentation for Calibration Laboratories, including Regional Instrument Centres (IOM Report No. 101)

·       Training Material on Metrology and Calibration (IOM Report No. 86)


Calibration of Pressure Instruments

·      Guide to Instruments and Methods of Observation (WMO-No.8), Vol. I, Chapter 3. Measurement of atmospheric pressure

·       JCGM 200:2012-International Vocabulary of Metrology (VIM) - Basic and general concepts and associated terms 

·      JCGM 100:2008(E) – Evaluation of measurement data - Guide to the Expression of Uncertainty in Measurement (GUM)

·       Guidance on the computation of calibration uncertainties (IOM Report No. 119)

·       Guidance on Instrumentation for Calibration Laboratories, including Regional Instrument Centres (IOM Report No. 101)

·       Training Material on Metrology and Calibration (IOM Report No. 86)

·       EURAMET Calibration Guidelines on Mass and Related Quantities


Calibration of Wind Instruments

·       Guide to Instruments and Methods of Observation (WMO-No.8), Vol. I, Chapter 5. Measurement of surface wind

·       JCGM 200:2012-International Vocabulary of Metrology (VIM) - Basic and general concepts and associated terms 

·      JCGM 100:2008(E) – Evaluation of measurement data - Guide to the Expression of Uncertainty in Measurement (GUM)

·       ISO 16622:2002 Meteorology — Sonic anemometers/thermometers — Acceptance test methods for mean wind measurements 

·       ISO 17713 1:2007 Meteorology — Wind measurements; Part 1: Wind tunnel test methods for rotating anemometer performance

·       ISO 3966:2020 - Measurement of fluid flow in closed conduits — Velocity area method using Pitot static tubes 


Calibration of Precipitation Instruments
 ·       Guide to Instruments and Methods of Observation (WMO-No.8), Vol. I, Chapter 6. Measurement of precipitation

·       JCGM 200:2012-International Vocabulary of Metrology (VIM) - Basic and general concepts and associated terms 

·       JCGM 100:2008(E) – Evaluation of measurement data - Guide to the Expression of Uncertainty in Measurement (GUM)

·        WMO Solid Precipitation Intercomparison Experiment (SPICE) (2012–2015) (WMO/TD-No. 1544)-(IOM Report No. 131)

·         WMO Solid Precipitation Measurement Intercomparison (WMO/TD-No. 872)-(IOM Report No. 67)

·          Guidelines on the Determination of Uncertainty in Gravimetric Volume Calibration | TC-F | EURAMET Calibration Guideline No. 19 Version 3.0, 09/2018 ​

·          EURAMET Calibration Guidelines   


Competencies of Laboratory Personnel 

·       Guide to Instruments and Methods of Observation (WMO-No.8), Vol. V, Ch. 5, Annex 5.C. Competency framework for personnel performing instrument calibrations,

·       Compendium of WMO Competency Frameworks (WMO-No.1209)

·       Good Laboratory Practice (GLP) 


Interlaboratory Comparisons 

·       Guide to Instruments and Methods of Observation(WMO-No.8), Vol. V, Ch. 4. Testing, Calibration and Intercomparison

·       ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories

·       ISO/IEC 17043:2023 Conformity assessment

·       Report on Interlaboratory Comparison in the field of Temperature, Humidity and Pressure in the WMO Regional Association II, V and VI (MM-ILC-2018-THP-2) (IOM Report No. 134)

·       Interlaboratory Comparison in the field of Temperature, Humidity and Pressure, in the WMO Regional Association VI (MM-ILC-2015-THP) (IOM Report No. 128)


Calibration Certificate

·       ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories


Last modified: Thursday, 30 October 2025, 2:12 PM