Category: Level 1 satellite traceability

A primary objective of MetEOC is to facilitate the take up of the technology and measurement infrastructure developed in the project by the measurement supply chain, an example of which is recounted in the case study, hosted in a new section of this website, ‘Calibration of the CNES and UKSA MicroCarb optical instrument’.  As described, a satellite-based validation method will be essential for ensuring long-term trust in the global emission reporting system used to track progress towards the goals of the 2015 Paris Climate Change Agreement. Indeed, in December of that year, the MicroCarb micro-satellite concept was presented at the Paris Climate Change Conference (COP21) with a mission to map, on a global scale, sources and sinks of carbon dioxide (CO2), …

MetEOC Case study: Calibration of the CNES/UKSA MicroCarb GHG monitoring satellite sensor Read More »

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The last few months are seen something of a flurry of papers related to MetEOC-4 published in peer-reviewed journals, each featuring innovative and impactful outcomes we encourage you to view and download. Four papers have been published so far this year out of a total of 15 to date. In addition, ahead of publication, the paper Traceability of surface longwave irradiance measurements to SI using the IRIS radiometers is available as a pre-print for rapid dissemination. Accessible papers freely viewable online are tabulated below. Dive in!   Lead author Title Journal Publication date Veronica Escober Ruiz A novel C-band radar-drone for forest canopy profile characterization International Journal of Remote Sensing 21 April 2023 Ilaria Cazzaniga AERONET-OC LWN uncertainties: revisited Journal of Atmospheric and …

Round-up of recently published papers authored by MetEOC-4 participants Read More »

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A year on from its initial public release, the NPL-developed CoMet toolkit has been used in several earth observation projects, including MetEOC, and recognised for the value it offers to the earth observation community. Environmental observations made by satellites and in-situ measurement networks provide data that forms the basis of scientific understanding of the state of the climate. Such datasets need to contain information about the associated uncertainties to be accepted as credible and reliable — the handling of which can be a complex and, potentially, error-prone process. Moreover, as multiple measurements are typically combined through processing chains, reliably handling this information can seem overly time-consuming for non-specialists.   A simpler way to store and propagate uncertainty and error-correlation information Metrological …

Reliable and user-friendly handling of earth observation uncertainty data with CoMet Toolkit Read More »

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Marking a halfway reporting milestone, on 14 September 2022 EURAMET published its MetEOC-4 Publishable Summary that highlights significant recent progress made toward the long-term objective of the MetEOC series: development of an SI-traceable climate observation system. As with preceding projects in this series, MetEOC-4 encompasses a diverse range of research activities, structured according to four themes matching a set of predefined objectives. It continues existing, and initiates new, lines of research, developing tools, methods, and infrastructure capable of assigning metrologically (SI) traceable uncertainties to data products derived from Earth Observations, with a focus on climate change. More than half of the 54 atmosphere, land, and ocean Essential Climate Variables (ECVs) rely on measurements from space. These are physical, chemical, biological, or …

Roundup of progress in first eighteen months of MetEOC-4 Read More »

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Very good agreement shown for irradiance measurements made by novel lightweight Hemispherical Blackbody infrared reference developed in MetEOC projects when compared to reference Tilted Bottom Cavity BB2007 instrument of PMOD/WRC.  Presented as an ePoster on Thursday 25 November 2021 at the the European Space Agency ATMOS-2021 conference, Blackbody Comparison Measurements for Improved Traceability of Longwave Downward Radiation Measurements (ID: 174), by Moritz Feierabend1, Julian Gröbner2, Max Reiniger1, Christian Monte1. —- Understanding climate change starts with understanding the greenhouse effect. This in turn requires knowledge about the infrared radiation that reaches the ground from the atmosphere – the so-called longwave downward radiation. Data on longwave downward radiation is being constantly collected by means of specific infrared detectors found at multiple stations around the globe. To …

Blackbody Comparison Makes Infrared Radiation Measurements of the Atmosphere More Reliable Read More »

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Meteoc-2 site visit to observe an example of site characterisation field work Agnieszka Bialek and Claire Greenwell of NPL visited the CNES site at La Crau, France, part of RadCalNet, a prototype network of automated vicarious satellite reference sites. This visit was one of four planned visits to RadCalNet prototype sites during the MetEOC 2 project, including the Gobabeb Research and Training Centre, Namibia, where a new member site of RadCalNet is currently being established.

The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is a German airborne imaging FTS (Fourier Transform Spectrometer) capable of operating on various airborne platforms for sensing dynamics and chemistry of the UTLS (Upper Troposphere and Lower Stratosphere) region. The instrument is a joint development of the research centers KIT (Karlsruher Institut für Technologie) and the Forschungszentrum (Research Center) Jülich. The University of Wuppertal is also a partner in the project. GLORIA uses a two-dimensional detector array for infrared limb-observations. The GLORIA in-flight calibration system consists of two identical large-area high-precision blackbodies, which are independently controlled at two different temperatures. Thermo-Electric Coolers are used to control the temperature of the blackbodies. As reported in the paper (paywall), the system …

In-flight blackbody calibration sources for the GLORIA interferometer paper published Read More »

PTB reports on the spectral radiance, radiance temperature and emissivity measurements by instrumentation for radiation thermometry and emissivity measurement under vacuum and in a liquid nitrogen cooled environment at its Reduced Background Calibration Facility (RBCF), for the Ninth International Temperature Symposium. AIP Conference Proceedings (restricted access): C. Monte, B. Gutschwager, A. Adibekyan, M. Kehrt, F. Olschewski, J. Hollandt of PTB and BUW present ‘Radiation thermometry for remote sensing at PTB‘ at the Ninth International Temperature Symposium. PTB is extending, improving and characterising its Reduced Background Calibration Facility in MetEOC.