Results 11 to 20 of about 6,939,496 (164)

Analyzing the reliability of in situ soil moisture measurements for satellite product validation: What makes fiducial reference measurements fiducial?

, 2023
To this day, in situ soil moisture data is viewed as ground truth by the satellite soil moisture (SSM) community. In general, little is still commonly known regarding the traceability of ground measurement uncertainty and their overall in uncertainty budget, which can impact satellite SSM product quality assessments.Within ESA’s &#8220 ...
Irene Himmelbauer, Alexander Gruber, Daniel Aberer, Wolfgang Preimesberger, Pietro Stradiotti, Wouter A. Dorigo, Alexander Boresch, Monika Tercjak, Francois Gibon, Arnaud Mialon, Philippe Richaume, Yann Kerr, Raul Diez Garcia, Raffaele Crapolicchio, Roberto Sabia, Klaus Scipal, Philippe Goryl   +16 more
openaire   +2 more sources

Towards a global land surface climate fiducial reference measurements network [PDF]

International Journal of Climatology, 2018
There is overwhelming evidence that the climate system has warmed since the instigation of instrumental meteorological observations. The Fifth Assessment Report of the Intergovernmental Panel on Climate Change concluded that the evidence for warming was unequivocal. However, owing to imperfect measurements and ubiquitous changes in measurement networks
P. W. Thorne, H. J. Diamond, B. Goodison, S. Harrigan, Z. Hausfather, N. B. Ingleby, P. D. Jones, J. H. Lawrimore, D. H. Lister, A. Merlone, T. Oakley, M. Palecki, T. C. Peterson, M. de Podesta, C. Tassone, V. Venema, K. M. Willett   +16 more
openaire   +8 more sources

Development of Surface Drifting Buoys for Fiducial Reference Measurements of Sea-Surface Temperature [PDF]

Frontiers in Marine Science, 2019
This paper presents the conception and the metrological characterization of a new surface drifting buoy, designed to comply with the requirements of satellite sea-surface temperature (SST) measurement validation and to link, per comparison, these ...
Marc Le Menn, Paul Poli, Arnaud David, Jérôme Sagot, Marc Lucas, Anne O'Carroll, Mathieu Belbeoch, Kai Herklotz   +7 more
doaj   +2 more sources

Fiducial Reference Measurements for Soil Moisture (FRM4SM): Toward a better understanding of (satellite) soil moisture uncertainties

, 2023
The aim of this presentation is to report on recent advances concerning the satellite based soil moisture validation done through the ESA project “Fiducial Reference Measurement for Soil Moisture (FRM4SM)”. The main objective of this two years project (May 2021 - May 2023) is to study the means to inform on the confidence in soil ...
Gibon, François, Boresch, Alexander, Himmelbauer, Irene, Aberer, Daniel, Crapolicchio, Raffaele, Díez-García, Raúl, Dorigo, Wouter, Goryl, Philippe, Gruber, Alexander, Kerr, Yann, Mialon, Arnaud, Preimesberger, Wolfgang, Richaume, Philippe, Rodriguez-Fernandez, Nemesio, Sabia, Roberto, Scipal, Klaus, Stradiotti, Pietro, Tercjak, Monika   +17 more
core   +4 more sources

Facial and mandibular landmark tracking with habitual head posture estimation using linear and fiducial markers

Healthcare Technology Letters
This study compared the accuracy of facial landmark measurements using deep learning‐based fiducial marker (FM) and arbitrary width reference (AWR) approaches. It quantitatively analysed mandibular hard and soft tissue lateral excursions and head tilting
Farhan Hasin Saad, Taseef Hasan Farook, Saif Ahmed, Yang Zhao, Zhibin Liao, Johan W. Verjans, James Dudley   +6 more
doaj   +3 more sources

Fiducial Reference Measurements for Soil Moisture (FRM4SM) Executive Summary Report

This is the executive summary report of the Fiducial Reference Measurements for Soil Moisture (FRM4SM) project, which was carried out by Angewandte Wissenschaft, Software und Technologie GmbH (AWST),Technische Universität Wien (TU Wien), and Centre d’Études Spatiales de la BIOsphère (CESBIO), it ran from May 2021–April 2023 (Phase 1) and was extended ...
Boresch, Alexander, Gruber, Alexander, Mialon, Arnaud, Gibon, François, Richaume, Philippe, Himmelbauer, Irene, Preimesberger, Wolfgang, Stradiotti, Pietro, Tercjak, Monika, Aberer, Daniel   +9 more
core   +6 more sources

Fiducial Reference Measurements for Air Quality Monitoring Using Ground-Based MAX-DOAS Instruments (FRM4DOAS)

Remote Sensing
The UV–Visible Working Group of the Network for the Detection of Atmospheric Composition Changes (NDACC) focuses on the monitoring of air-quality-related stratospheric and tropospheric trace gases in support of trend analysis, satellite validation and ...
Michel Van Roozendael, Francois Hendrick, Martina M. Friedrich, Caroline Fayt, Alkis Bais, Steffen Beirle, Tim Bösch, Monica Navarro Comas, Udo Friess, Dimitris Karagkiozidis, Karin Kreher, Alexis Merlaud, Gaia Pinardi, Ankie Piters, Cristina Prados-Roman, Olga Puentedura, Lucas Reischmann, Andreas Richter, Jan-Lukas Tirpitz, Thomas Wagner, Margarita Yela, Steffen Ziegler   +21 more
doaj   +3 more sources

Scientific and Operational Roadmap for Fiducial Reference Measurements in Satellite Altimetry Calibration & Validation

, 2019
This work provides the essential elements for a scientific and operational roadmap with guidelines and practical directions to calibrate satellite altimeters under a new established standard of Fiducial Reference Measurements for Altimetry. According to this new principle, ground facilities, instrumentation and procedures, set up for calibration and ...
Stelios P. Mertikas, Craig Donlon, Rob Cullen, Achilles Tripolitsiotis   +3 more
openaire   +2 more sources

GROUNDED EO: Data-driven Sentinel-2 LAI and FAPAR retrieval using Gaussian processes trained with extensive fiducial reference measurements [PDF]

Remote Sensing of Environment
Due to their importance in monitoring and modelling Earth's climate, the Global Climate Observing System (GCOS) designates leaf area index (LAI) and the fraction of absorbed photosynthetically active radiation (FAPAR) as essential climate variables (ECVs).
Brown, Luke A., Fernandes, Richard, Verrelst, Jochem, Morris, Harry, Djamai, Najib, Reyes-Muñoz, Pablo, D.Kovács, Dávid, Meier, Courtney   +7 more
openaire   +3 more sources

FRM4SM: Fiducial Reference Measurements for Soil Moisture

, 2022
Earth observation (EO) satellites are indispensable for the global monitoring of Essential Climate Variables (ECVs). The exploitation of EO data products, however, is hampered by a lack of complete and traceable information about their error budget ...
Garcia, R., Tercjak, Monika, Scipal, Klaus, Gruber, Alexander, Kerr, Yann, Aberer, Daniel, GIBON, François; orcid:, Richaume, Philippe, Himmelbauer, Irene, Mialon, Arnaud, Dorigo, Wouter Arnoud; orcid:, Preimesberger, Wolfgang; orcid:, Boresch, Alexander, Sabia, Roberto, Goryl, Philippe, Stradiotti, Pietro, Crapolicchio, Raffaele   +16 more
core   +4 more sources