The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Hugh Evans - One of the best experts on this subject based on the ideXlab platform.
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new radiation environment and effects models in the European Space Agency s Space environment information system spenvis
Social Work, 2004Co-Authors: D Heynderickx, B Quaghebeur, J Wera, E J Daly, Hugh EvansAbstract:[1] The European Space Agency (ESA) Space Environment Information System (SPENVIS) provides standardized access to models of the hazardous Space environment through a user-friendly Web interface, available at http://www.spenvis.oma.be/. SPENVIS is designed to help Spacecraft engineers perform rapid analyses of environmental problems and, with extensive documentation and tutorial information, allows engineers with relatively little familiarity with the models to produce reliable results. SPENVIS is based on internationally recognized standard models and methods in many domains. It uses an ESA-developed orbit generator to produce orbital point files necessary for many different types of problem. It has various reporting and graphical utilities and extensive help facilities. SPENVIS also contains an active, integrated version of the European Cooperation for Space Standardization Space Environment Standard, and access to in-flight data. Apart from radiation and plasma environments, SPENVIS includes meteoroid and debris models, atmospheric models (including atomic oxygen), and magnetic field models. Recently, the radiation sources and effects module have been rewritten, providing enhanced mission analysis features, new radiation effects models, and streamlined navigation between various model pages.
Carsten Brockmann - One of the best experts on this subject based on the ideXlab platform.
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plant functional type classification for earth system models results from the European Space Agency s land cover climate change initiative
Geoscientific Model Development, 2015Co-Authors: I. Khlystova, Sébastien Bontemps, Monika Boettcher, A. Hartley, Richard Betts, Olivier Arino, N. Macbean, Benjamin Poulter, Carsten BrockmannAbstract:Global land cover is a key variable in the earth system with feedbacks on climate, biodiversity and natural resources. However, global land cover data sets presently fall short of user needs in providing detailed spatial and thematic information that is consistently mapped over time and easily transferable to the requirements of earth system models. In 2009, the European Space Agency launched the Climate Change Initiative (CCI), with land cover (LC_CCI) as 1 of 13 essential climate variables targeted for research development. The LC_CCI was implemented in three phases: first responding to a survey of user needs; developing a global, moderate-resolution land cover data set for three time periods, or epochs (2000, 2005, and 2010); and the last phase resulting in a user tool for converting land cover to plant functional type equivalents. Here we present the results of the LC_CCI project with a focus on the mapping approach used to convert the United Nations Land Cover Classification System to plant functional types (PFTs). The translation was performed as part of consultative process among map producers and users, and resulted in an open-source conversion tool. A comparison with existing PFT maps used by three earth system modeling teams shows significant differences between the LC_CCI PFT data set and those currently used in earth system models with likely consequences for modeling terrestrial biogeochemistry and land–atmosphere interactions. The main difference between the new LC_CCI product and PFT data sets used currently by three different dynamic global vegetation modeling teams is a reduction in high-latitude grassland cover, a reduction in tropical tree cover and an expansion in temperate forest cover in Europe. The LC_CCI tool is flexible for users to modify land cover to PFT conversions and will evolve as phase 2 of the European Space Agency CCI program continues.
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plant functional type classification for earth system models results from the European Space Agency s land cover climate change initiative
Geoscientific Model Development, 2015Co-Authors: I. Khlystova, A. Hartley, Richard Betts, Olivier Arino, N. Macbean, Ben Poulter, Sophie Bontemps, Martin Boettcher, Carsten BrockmannAbstract:Global land cover is a key variable in the earth system with feedbacks on climate, biodiversity and natural resources. However, global land cover data sets presently fall short of user needs in providing detailed spatial and thematic information that is consistently mapped over time and easily transferable to the requirements of earth system models. In 2009, the European Space Agency launched the Climate Change Initiative (CCI), with land cover (LC_CCI) as 1 of 13 essential climate variables targeted for research development. The LC_CCI was implemented in three phases: first responding to a survey of user needs; developing a global, moderate-resolution land cover data set for three time periods, or epochs (2000, 2005, and 2010); and the last phase resulting in a user tool for converting land cover to plant functional type equivalents. Here we present the results of the LC_CCI project with a focus on the mapping approach used to convert the United Nations Land Cover Classification System to plant functional types (PFTs). The translation was performed as part of consultative process among map producers and users, and resulted in an open-source conversion tool. A comparison with existing PFT maps used by three earth system modeling teams shows significant differences between the LC_CCI PFT data set and those currently used in earth system models with likely consequences for modeling terrestrial biogeochemistry and land–atmosphere interactions. The main difference between the new LC_CCI product and PFT data sets used currently by three different dynamic global vegetation modeling teams is a reduction in high-latitude grassland cover, a reduction in tropical tree cover and an expansion in temperate forest cover in Europe. The LC_CCI tool is flexible for users to modify land cover to PFT conversions and will evolve as phase 2 of the European Space Agency CCI program continues.
Gayandhi M De Silva - One of the best experts on this subject based on the ideXlab platform.
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the galah survey and gaia dr2 dissecting the stellar disc s phase Space by age action chemistry and location
Monthly Notices of the Royal Astronomical Society, 2019Co-Authors: Joss Blandhawthorn, Sanjib Sharma, Thor Teppergarcia, James Binney, K C Freeman, Michael R Hayden, Janez Kos, Gayandhi M De SilvaAbstract:We use the second data releases of the European Space Agency Gaia astrometric survey and the high-resolution Galactic Archaeology with HERMES (GALAH) spectroscopic survey to analyse the structure o ...
D Heynderickx - One of the best experts on this subject based on the ideXlab platform.
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new radiation environment and effects models in the European Space Agency s Space environment information system spenvis
Social Work, 2004Co-Authors: D Heynderickx, B Quaghebeur, J Wera, E J Daly, Hugh EvansAbstract:[1] The European Space Agency (ESA) Space Environment Information System (SPENVIS) provides standardized access to models of the hazardous Space environment through a user-friendly Web interface, available at http://www.spenvis.oma.be/. SPENVIS is designed to help Spacecraft engineers perform rapid analyses of environmental problems and, with extensive documentation and tutorial information, allows engineers with relatively little familiarity with the models to produce reliable results. SPENVIS is based on internationally recognized standard models and methods in many domains. It uses an ESA-developed orbit generator to produce orbital point files necessary for many different types of problem. It has various reporting and graphical utilities and extensive help facilities. SPENVIS also contains an active, integrated version of the European Cooperation for Space Standardization Space Environment Standard, and access to in-flight data. Apart from radiation and plasma environments, SPENVIS includes meteoroid and debris models, atmospheric models (including atomic oxygen), and magnetic field models. Recently, the radiation sources and effects module have been rewritten, providing enhanced mission analysis features, new radiation effects models, and streamlined navigation between various model pages.
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new radiation environment and effects models in the European Space Agency s Space environment information system spenvis
Space Weather-the International Journal of Research and Applications, 2004Co-Authors: D Heynderickx, E. Daly, B Quaghebeur, J Wera, H EvansAbstract:[1] The European Space Agency (ESA) Space Environment Information System (SPENVIS) provides standardized access to models of the hazardous Space environment through a user-friendly Web interface, available at http://www.spenvis.oma.be/. SPENVIS is designed to help Spacecraft engineers perform rapid analyses of environmental problems and, with extensive documentation and tutorial information, allows engineers with relatively little familiarity with the models to produce reliable results. SPENVIS is based on internationally recognized standard models and methods in many domains. It uses an ESA-developed orbit generator to produce orbital point files necessary for many different types of problem. It has various reporting and graphical utilities and extensive help facilities. SPENVIS also contains an active, integrated version of the European Cooperation for Space Standardization Space Environment Standard, and access to in-flight data. Apart from radiation and plasma environments, SPENVIS includes meteoroid and debris models, atmospheric models (including atomic oxygen), and magnetic field models. Recently, the radiation sources and effects module have been rewritten, providing enhanced mission analysis features, new radiation effects models, and streamlined navigation between various model pages.
Benjamin Poulter - One of the best experts on this subject based on the ideXlab platform.
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plant functional type classification for earth system models results from the European Space Agency s land cover climate change initiative
Geoscientific Model Development, 2015Co-Authors: I. Khlystova, Sébastien Bontemps, Monika Boettcher, A. Hartley, Richard Betts, Olivier Arino, N. Macbean, Benjamin Poulter, Carsten BrockmannAbstract:Global land cover is a key variable in the earth system with feedbacks on climate, biodiversity and natural resources. However, global land cover data sets presently fall short of user needs in providing detailed spatial and thematic information that is consistently mapped over time and easily transferable to the requirements of earth system models. In 2009, the European Space Agency launched the Climate Change Initiative (CCI), with land cover (LC_CCI) as 1 of 13 essential climate variables targeted for research development. The LC_CCI was implemented in three phases: first responding to a survey of user needs; developing a global, moderate-resolution land cover data set for three time periods, or epochs (2000, 2005, and 2010); and the last phase resulting in a user tool for converting land cover to plant functional type equivalents. Here we present the results of the LC_CCI project with a focus on the mapping approach used to convert the United Nations Land Cover Classification System to plant functional types (PFTs). The translation was performed as part of consultative process among map producers and users, and resulted in an open-source conversion tool. A comparison with existing PFT maps used by three earth system modeling teams shows significant differences between the LC_CCI PFT data set and those currently used in earth system models with likely consequences for modeling terrestrial biogeochemistry and land–atmosphere interactions. The main difference between the new LC_CCI product and PFT data sets used currently by three different dynamic global vegetation modeling teams is a reduction in high-latitude grassland cover, a reduction in tropical tree cover and an expansion in temperate forest cover in Europe. The LC_CCI tool is flexible for users to modify land cover to PFT conversions and will evolve as phase 2 of the European Space Agency CCI program continues.
