MetEOC Home

Combining ground, atmosphere, and space-based measurements to develop metrology tools and frameworks that support climate observation systems capable of building understanding of drivers of climate change

Research Themes

Level 1 satellite traceability
Developing sensors for space-based climate observations, suitable for pre-and in-flight measurements, including TRUTHS and FORUM mission studies
Atmospheric ECVs
Developing SI-traceable measurement methods for bio-geophysical parameters, via optical and Synthetic Aperture Radar sampling techniques











Biophysical ECVs
Developing satellite-derived SI traceable greenhouse gas emissions and carbon sink measurement methods, including robust monitoring of carbon emissions reduction policies
Radiation ECVs
Developing instrumentation and standards for traceable climate quality measurements, from surface-based networks operated by the WMO and UN














Coordinated by NPL, MetEOC is series of collaborative European metrology projects that support Earth Observation applications — by establishing metrological techniques, including pre-flight calibration, post-launch on-board and vicarious calibration, and validation of higher level products.


ESA - The TRUTHS mission aims to establish an SI-traceable space-based climate and calibration observing system to improve confidence in climate-change forecasts – a kind of ‘standards laboratory in space’. It would carry a hyperspectral imager to provide benchmark measurements of both incoming solar radiation and outgoing reflected radiation with an unprecedented accuracy. These benchmark measurements would improve our ability to estimate radiative imbalance underlying climate change and, importantly, in a shorter time than is currently possible. Reference datasets from TRUTHS would also serve to calibrate other satellite sensors, such as those carried on the Copernicus missions.
MetEOC-4 September 2020 – August 2023
September 2017 – February 2021
September 2014 – August 2017
October 2011 – September 2014








These European Metrology Research Programme (EMPR) and the European Metrology Programme for Innovation and Research (EMPIR)  projects are supported by EURAMET’s European Metrology Research Programmes.