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Instruments and Methods of Observation Programme (IMOP)

The Instruments and Methods of Observation Programme (IMOP) sets technical standards, quality control procedures and guidance for the use of meteorological instruments and observation methods in order to promote development documentation and world-wide standardization.

Instruments and Methods of Observation Programme
About IMOP
Purpose and Scope
Vision
Working structure
About Working structure
About SC-MINT
TECO-2024
Previous TECOs
About CIMO
ICAWS-2017
Publications (including WMO-No. 8, WMO-No. 407 and WMO-No.1257)
Publications
WMO-No. 8 (Guide to Instruments and Methods of Observation) - Edition 2024
WMO-No.1257 (Guide to Operational Weather Radar Best Practices)-Edition 2024
IOM Report Series
International Cloud Atlas (WMO-No.407)
Generic AWS Tender Specifications (IOM Report No.136)
Knowledge-sharing Portal
Relevant material
Knowledge-sharing Portal
Information Flyer on Traceability
Guidance on Approaches for Traceability Assurance in GBON Stations
Microwave Radiometers Leaflet
Intercomparisons
About intercomparisons
Intercomparisons
SPICE
Short Film on IPC-XII (12 min)
Other resources & events
Other resources and events
Siting Classification for Surface Observing Stations on Land
Monitoring Reports/Statistics
IMOP Meetings
Use of Mercury
Final Reports of CIMO-related Meetings
Radiosonde Catalogue
Regional Instrument Centres
About RICs
Regional Instrument Centres
Radiation Centres
About RCs
Radiation Centres
Measurement Lead Centres
About MLCs
Measurement Lead Centres

Related news

IOM Report for the Baltic Region Pyrheliometer Comparison - 2023 (IOM Report No. 146)
IOM Report for the Fifth WMO Regional Pyrheliometer Comparison of RA II, held jointly with RA V
IOM Report for the Proceedings of TECO-2024
WMO Survey on Non-Catchment Instruments for Precipitation Measurements
Provisional 2024 Edition of the Guide to Instruments and Methods of Observation (WMO-No.8)
Provisional 2024 Edition of the Guide to Operational Weather Radar Best Practices (WMO-No.1257)
WMO Technical Conference on Meteorological and Environmental Instruments and Methods of Observation (TECO-2024)
Preliminary 2024 Edition of the Guide to Operational Weather Radar Best Practices (WMO-No.1257)
Forum on Advancing the Environmental Sustainability of Observing Systems and Methods
Provisional 2023 edition of the Guide to Operational Weather Radar Best Practices
Related activity areas
WMO Integrated Global Observing System (WIGOS)
Global Observing System (GOS)
Global Cryosphere Watch (GCW)
Aircraft-Based Observations
Weather Radar Observations
Related documents
Guide to Instruments and Methods of Observation (WMO-No. 8)

Active meetings

No meetings found.

Upcoming meetings

- - Beijing, China
SC-MINT/Expert Team on Transition to Modern Measurement Meeting,Beijing, China-10-13 November 2025 (Hybrid)

Past meetings

- -
WMO Regional Instrument Centres (RICs) Workshop: Building a Community of RICs, 29 September 2025 (Online)
- - Cairo, Egypt
Meeting of the SC-MINT Expert Team on Quality, Traceability and Calibration (ET-QTC)
- - Cairo, Egypt
Workshop of WMO Regional Instrument Centres
- - Cairo, Egypt
Training Workshop on Calibration of Meteorological Instruments and related Uncertainty Calculation (RA-I & RICs)
- - Online
WMO Online Workshop on Transition to Automated Ground-based Measurements (RA-I and Arabic-speaking countries)
- - Hybrid, Geneva, Switzerland
SC-MINT/Editorial Board-Meeting no.25
- - Online
WMO Online Workshop on Transition to Automated Ground-based Measurements (RA-I and Arabic-speaking countries)
- - Casablanca, Morocco
Workshop on Calibration and Maintenance of Meteorological Instruments for RA-I
- - Hybrid, Geneva, Switzerland
SC-MINT Meeting- no. 10
- - On-line
WMO Virtual Workshop on Environmental Sustainability of Observing Systems and Methods