Thierry Ranchin

Thierry Ranchin
MINES ParisTech, PSL Research University

Directeur de Recherche

About

177
Publications
34,665
Reads
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4,360
Citations
Additional affiliations
January 2013 - present
MINES ParisTech
Position
  • Managing Director
Education
December 2005 - December 2005
University of Nice Sophia Antipolis
Field of study
  • Applied Mathematics
October 1991 - July 1993
University of Nice Sophia Antipolis
Field of study
  • Applied Mathematics

Publications

Publications (177)
Article
Earth Observation (EO) is the collecting, analysing and presentation of information related to the Earth to improve understanding of our planet. The data that is gathered is usually centered on physical, chemical and biological systems that help researchers identify and understand changes in the natural and manmade environment. Observing Earth from...
Article
Full-text available
The development of successful climate services faces a number of challenges, including the identification of the target audience and their needs and requirements, and the effective communication of complex climate information, through engagement with a range of stakeholders. This paper describes how these challenges were tackled during the European...
Conference Paper
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This communication assesses six methods estimating UltraViolet A and B (UV-A and UV-B) fluxes from satellite imagery, numerical weather models or ground measurements. The UV estimates from each method are compared to coincident 15 minutes in-situ measurements collected at one location in Uruguay from September 2015 to January 2019. The first method...
Article
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Essential Variables are defined as a minimal set of variables that explain the state of the system. They are crucial for predicting its developments, and support metrics that measure its evolution. The variables should be relevant to meet requirements of stakeholders and be technically and economically feasible for systematic observation. A definit...
Conference Paper
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This communication analyses the performance of several methods to estimate Ultra-Violet A and B (UV-A and UV-B) from satellite imagery. The benefits and harms of the UV on human health are studied since long. UV may have also adverse effects by stressing plants. Due to high costs of UV radiometers, measurements are spatially and temporally scarce....
Article
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The EU Copernicus Climate Change Service (C3S) European Climatic Energy Mixes (ECEM) has produced, in close collaboration with prospective users, a proof-of-concept climate service, or Demonstrator, designed to enable the energy industry and policy makers assess how well different energy supply mixes in Europe will meet demand, over different time...
Article
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Classical approaches to the calculation of the photovoltaic (PV) power generated in a region from meteorological data require the knowledge of the detailed characteristics of the plants, which are most often not publicly available. An approach is proposed with the objective to obtain the best possible assessment of power generated in any region wit...
Conference Paper
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In a similar way to the well-known Essential Climate Variables, an identification of the Essential Renewable Energies Variables has been performed in several domains in renewable energies. Essential Renewable Energies Variables are defined as a minimal set of variables that determine the state of the energy system, are crucial for predicting its de...
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The construction of a bias-adjusted dataset of climate variables at the near surface using ERA-Interim reanalysis is presented. A number of different, variable-dependent, bias-adjustment approaches have been proposed. Here we modify the parameters of different distributions (depending on the variable), adjusting ERA-Interim based on gridded station...
Article
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The construction of a bias-adjusted dataset of climate variables at the near surface using ERA-Interim Reanalysis is presented. A number of different bias-adjustment approaches have been proposed. Here we modify the parameters of different distributions (depending on the variable), adjusting those calculated from ERA-Interim to those based on gridd...
Conference Paper
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This paper presents a survey of Synthetic Aperture Radar-based techniques that are used to extract bathymetric features or create bathymetric maps. With standard techniques, realization of a bathymetric map is currently very expensive. Indeed, the best results are achieved by onboard multi-beam sonars but measurement campaigns are very expensive an...
Conference Paper
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This paper investigates the capacity of appropriate Earth Observation Systems (EOS) – in situ and satellite measurements, numerical models – to deliver basic variables from which high level information relevant for Marine Renewable Energy (MRE) resource assessment can be generated. In addition, an operational solution for the production and dissemi...
Article
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We present how implementations of the Sensor Web Enablement framework of the Open Geospatial Consortium are integrated into an existing spatial data infrastructure. The result is registered as a community portal for professionals in solar energy in the GEOSS Common Infrastructure, demonstrating the benefits of interoperable exchange of in-situ time...
Article
La région Provence-Alpes-Côte d’Azur face au changement climatique. Le GREC-PACA publie, en juin 2015, un cahier présentant un panorama général des enjeux et des conséquences du changement climatique en Provence-Alpes-Côte d’Azur.
Book
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Téléchargeable à l'adresse : http://www.air-climat.org/wp-content/uploads/2015/05/GREC-PACA_EnjeuxCC_BD_10062015.pdf La région Provence-Alpes-Côte d’Azur face au changement climatique. Le GREC-PACA publie, en juin 2015, un cahier présentant un panorama général des enjeux et des conséquences du changement climatique en Provence-Alpes-Côte d’Azur.
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This article proposes a new method to assess the health impact of populations exposed to fine particles (PM2.5) during their whole lifetime, which is suitable for comparative analysis of energy scenarios. The method takes into account the variation of particle concentrations over time as well as the evolution of population cohorts. Its capabilities...
Article
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The HelioClim-1 database contains daily values of the solar radiation reaching the ground. This GEOSS (Global Earth Observation System of Systems) Data Collection of Open Resources for Everyone (Data-CORE) covers Europe, Africa and the Atlantic Ocean, from 1985 to 2005. It is freely accessible at no cost through the SoDa Service (www.soda-is.com)....
Conference Paper
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This paper presents an approach for Environmental Impact Assessment through the use of geolocalized LCA approach, for fixed and floating offshore wind farms. This work was undertaken within the EU-sponsored EnerGEO project, aiming at providing a versatile modeling platform for stakeholders allowing calculation, forecasting and monitoring of environ...
Article
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The weather research and forecasting model (WRF) is initialized with ERA-Interim re-analysis to produce a higher resolution dataset over a one month period. WRF is supposed to introduce small scale information and maintain the mean large scale features. A detailed spectral analysis is performed to verify this statement. It reveals that consistency...
Conference Paper
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With the International Energy Agency estimating that global energy demand will increase between 40 and 50 percent by 2030 (compared to 2003), scientists and policymakers are concerned about the sustainability of the current energy system and what environmental pressures might result from the development of future energy systems. EnerGEO is an ongoi...
Conference Paper
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This article reports impact results from running the EnerGEO Platform of Integrated Assessment (PIA) related to human health for different scenarios in Europe. The scenarios were prepared within the EnerGEO project. The idea of this European project is to determine how low carbon scenarios, and in particular scenarios with a high share of renewable...
Conference Paper
People exposure to particulate matter can have various health effects as described in scientific publications in the area of observational epidemiology. This study estimates the Loss of Life Expectancy (LLE) related to PM2.5 concentrations corresponding to a selected baseline energy scenario derived from the GAINS model. Most often energy scenarios...
Article
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Assessment of environmental impacts of a power system exploiting a renewable energy needs a large number of geographically-dependent data and of technological data. These data are located in various sources and available in various formats. To avoid the burden of data collection and reformatting, we exploit the interoperability capabilities set up...
Presentation
Abstract : Wind resources mapping requires high frequency wind measurements regularly spatially distributed in the area of interest. In this study the goal is to provide a wind resources atlas in an area where the density of ground measurements stations is low. To make up for the lack of measurements, numerical meteorological models are used. Howev...
Article
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Within the Architecture Implementation Pilot (AIP-3) of GEOSS, we have developed a scenario called “environmental impact assessment of the production, transportation and use of energy for the photovoltaic (PV) sector through Life Cycle Assessment (LCA)”. It aims at providing decision-makers and policy-planners with reliable and geo-localized knowle...
Chapter
This chapter focuses on techniques related to image fusion and data fusion from different sources with varying spatial and spectral resolutions, and presents and discusses some of the technical issues that influence data fusion in the urban context.
Conference Paper
Full-text available
Renewable energy sources such as solar and wind energy offer a large untapped potential for electricity production. The exploitation of these energies requires accurate knowledge of the resources and of their availability (in space and time) as well as accurate forecasts in the different phases of an energy system life cycle. For instance, the site...
Conference Paper
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This paper presents the first prototype of a new method –called Heliosat-4– for assessing solar surface irradiance. The Heliosat-4 method is based on the radiative transfer model libRadtran and benefits from advanced products derived from recent Earth Observation missions. It will provide direct and diffuse components and spectral distribution of s...
Article
Full-text available
Wind resource mapping needs accurate high spatial and temporal resolutions wind measurements. Offshore, satellite data are an accurate and economic way to access wind measurements. Previous studies showed the capabilities of some remote sensing instruments to measure the wind. Synthetic aperture radars (SAR) have a high spatial resolution but are a...
Article
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This article addresses the problem of street extraction in high resolution images from a topologically correct graph of the network. The extraction algorithm makes use of specific active contours (snakes) combined with a multiresolution analysis (MRA). The use of the MRA for computing the snake’s energy enables to increase the convergence of the al...
Article
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Maps of pollutants concentration are usually generated by means of interpolation and extrapolation methods. The quality of the results depends mainly of the number of permanent or temporary measuring stations. This paper deals with a method for the virtual densification of the network of stations. The method creates "virtual measuring stations". It...
Article
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Our framework is the synthesis of multispectral images (MS) at higher spatial resolution, which should be as close as possible to those that would have been acquired by the corresponding sensors if they had this high resolution. This synthesis is performed with the help of a high spatial but low spectral resolution image: the panchromatic (Pan) ima...
Article
Book chapter partially available at: http://books.google.fr/books?id=WjbUuuliObQC&pg=PA215&lpg=PA215&dq=Road+networks+derived+from+high+spatial+resolution+satellite+remote+sensing+data.&source=bl&ots=V3hvzP7rGZ&sig=oX9rhQ_Jz3BdGoX4SDP0liL0p_U&hl=fr&sa=X&oi=book_result&resnum=1&ct=result#PPA215,M1
Conference Paper
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Metadata are necessary to discover, describe and exchange any type of information, resource and service at a large scale. A significant amount of effort has been made in the field of geography and environment to establish standards. Efforts still remain to address more specific domains such as renewable energies. This communication focuses on solar...
Article
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The availability of very high spatial resolution satellite images over urban areas is recent. The very high spatial resolution enables a real representation of streets on a map, but generates a significant increase of noise. A state-of the-art on road and street extraction with the evolution from linear to surface models for road and street is prop...
Article
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This paper describes an infrared image simulator for remote sensing applications, called OSIrIS (outdoor scene and infrared image simulation). It has been developed partly for training and reproduces with great details the physical phenomena that play a major role in complex urban environment. OSIrIS performs a synthesis of scene based on a 3-D des...
Conference Paper
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A data fusion scheme is proposed for wind energy resource mapping at high spatial resolution. The resource assessment is based on wind speed and direction measurements. Remotely sensed data is a solution to get wind observations offshore. However, high spatial resolution data do not have a sufficient repetitiveness to establish reliable wind energy...
Conference Paper
By fusing two sets of images A and B, one with a high spatial resolution, the other with a low spatial resolution and different spectral bands, the ARSIS (from its French name: "amelioration de la resolution spatiale par injection de structures". It is usually translated by improvement of the spatial resolution by structures' injection) concept per...
Article
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Due to the large dimensions of offshore wind farms, their electricity production must be known well in advance to allow an efficient integration of wind energy into the European electricity grid. For this purpose short-term wind power prediction systems which are already in operation for onshore sites have to be adapted to offshore conditions, whic...
Article
For developing offshore wind farms, wind energy industry needs accurate estimation of the resource associated to reliable confidence intervals. Offshore, remotely sensed data proposes a solution to fulfill the lack of in-situ data. In this paper, an analysis of different errors due to the use of remotely sensed data is proposed. We present a method...
Article
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Les travaux effectués dans le cadre de mes activités de recherche et d'enseignements au sein du Centre Energétique et Procédés de l'Ecole des Mines de Paris concernent la description et la compréhension des problématiques liées à l'environnement dans le cadre du protocole de Kyoto. Dans ce cadre, les satellites d'observation de la Terre sont un for...
Conference Paper
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The knowledge of wind resource is essential to the sitting of a wind farm. This is crucial especially in coastal areas where installation of windmills is more costly than onshore. More accurate estimation of the resource is necessary to preserve the confidence of investors and reduce the cost of production. Nowadays, the resource is evaluated by in...
Article
In this paper, the problem of the influence of the acquisition dates for the improvement of the spatial resolution of images using data fusion is addressed. The studied area is the Three Gorges Dam on the Yangtze river in Sandouping area, China. Over the past several years, significant changes have taken place. The set of images to fused is compose...
Article
An accurate evaluation of the wind potential is needed to assess the economic reliability of an offshore wind project and to site wind farms, which need high-spatial-resolution wind fields with high repetitiveness. A measurement campaign is highly expensive, and the in situ data obtained are insufficient: the data time series are too short, and onl...
Article
Multi-temporal SPOT images, ERS-SAR image, Radarsat images and Landsat TM images were applied in the study. The ARSIS method was mainly used to make fusion of the SPOT XS and Panchromatic images, achieving high quality of image results. many new geological, structural features and hazard phenomenon are found, achieving remarkable results: (1) An or...
Conference Paper
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Available online for free at http://www.earsel.org/symposia/2005-symposium-Porto/index.htm
Article
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The European policy in urban atmospheric pollution aims at reducing its impact on human health. This problem of public health is closely related to exposure of citizens during the day. Its estimation through persons activities defines the space-time budget. Sooner or later the local authorities in charge of air quality will provide to the populatio...
Conference Paper
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The resolution is what characterize the capacity of an imaging system to describe how much details are visible in the image, depending on their size. Image quality is often characterized by well-known measures and criteria, usually linked with radiometry, like mean, contrast, brightness, noise variance, radiometric resolution or granularity. Only a...
Conference Paper
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This paper presents a platform for the assessment of strategies for the fusion of images of various modalities and having different spatial resolution. The purpose of the fusion is the synthesis of multimodal images offering the best spatial resolution available in the data set. These synthesized images should be as close as possible to reality. Th...
Article
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La disponibilité d'images satellites à très haute résolution spatiale au dessus de zones urbaines est récente. Elle constitue potentiellement un très grand apport pour la cartographie des villes à des échelles de l'ordre du 1 :10 000. La très haute résolution spatiale de ces nou-veaux capteurs permet une représentation réelle des rues sur une carte...
Article
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Urban mapping has become a challenge for scientists since the launch of high spatial resolution satellites. This paper focuses on the problem of quality when extracting roads from such data. The definition of a judicious reference enabling the establishment of quantitative criteria is proposed. A method is presented and two sets of criteria dedicat...
Conference Paper
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Accurate aerosol data at global scale are a key product for climate system monitoring. Maps of optical parameters of the atmosphere often result from application of numerical models or satellite images processing. Such maps usually exhibit very large cell sizes, of the order of 1 degree of arc angle. There is a need to increase their spatial resolu...
Conference Paper
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Most of the satellite sensors, presently operating in the optical domain, are providing a data set comprising multispectral images at a low spatial resolution and images at a higher spatial resolution but with a lower spectral content. The trend of satellite sensors is similar to the present situation. The idea of fusing multispectral images with a...