In this paper the FlowSimulator framework for multidisciplinary computational fluid dynamics simu... more In this paper the FlowSimulator framework for multidisciplinary computational fluid dynamics simulations on high performance computer platforms is described. An overview of the provided functionality is given and possible benefits for tool developers as well as design engineers are presented.
6th European Conference on Space Debris, Aug 1, 2013
The history of space surveillance by ground based optical telescopes goes back to the early days ... more The history of space surveillance by ground based optical telescopes goes back to the early days of spaceflight. Since the beginning, detection of uncatalogued space objects faces the difficulty of initial orbit determination from angles only observations within a limited time period. Multiple short arc data sets have to be combined to calculate orbital elements with sufficient accuracy. For this purpose, the hypotheses have to be tested that one or more short arc measurements belong to the same object. Solving this correlation or object identification problem efficiently becomes more urgent than ever before with the increasing space object population. The described correlation problem is set up on a large scale by observation simulations for a global network of six robotic telescopes over one month. This survey generates more than 12.000 short arc data sets called tracklets from 1.027 objects in near geostationary orbits (GEO). Initial orbital elements are determined from the short arc measurements applying a circular orbit assumption. Based on the orbital elements, a hypotheses filter for pair and triple tracklet combinations is presented. The newly developed pair filter features high filter rates with simultaneously low filter errors at a negligible computational effort. It is therefore recommended as a pre-filtering stage for more complex correlation methods like recent approaches that utilize the admissible region concept.
For a better understanding of the space environment and for safe and secure satellite operations,... more For a better understanding of the space environment and for safe and secure satellite operations, the German Space Operation Center (GSOC) together with the Astronomical Institute of the University of Bern (AIUB) have established SMARTnet™. Its main purpose is to act as an exchange platform for observational data of resident space objects. Its operation started in 2017 with telescope stations located in Switzerland and South Africa, and it was opened for international cooperation and exchange afterwards. Its first international Partner, Applied Defense Solutions, joined SMARTnet™ in 2018. In this paper, an overview of data of SMARTnet™, Partners, and statistics are given. To achieve the aforementioned objectives of research and safe operations, the Backbone Catalogue of Relational Debris Information (BACARDI) was invented, designed, and implemented. This is a joint effort of DLR’s Institute of Simulation and Software Technology (SC) together with GSOC. BACARDI is mainly divided into a data base, containing data and their respective meta data as well as processors for e. g. orbit determination, object correlation, or orbit propagation. In this paper, an overview of the architecture of BACARDI is shown, and the concept of the processing chains is presented. For resident space objects, a 3D visualization tool was designed and implemented by SC. Its capabilities and potentialities are demonstrated.
In a joint project of the DLR Institute for Simulation and Software Technology and DLR Space Oper... more In a joint project of the DLR Institute for Simulation and Software Technology and DLR Space Operations and Astronaut Training develop methods for space surveillance. The main objective of the project is to develop an orbital database for objects in Earth orbitcalled the Backbone Catalogue of Relational Debris Information (BACARDI). The research topics are object identification form different sensor observations, orbit determination and orbit propagation including state vector and state uncertainty. Main applications of the orbital database will be close approach prediction for collision avoidance-further on re-entry prediction, detection of satellite manoeuvres and on-orbit fragmentations. In this paper an introduction is given to the space object catalogue BACARDI. All information imported, processed and exported is stored within a relational database. A self-developed middleware provides the functionality for distributed computations on a scalable network of hardware devices. The data processing chain consists of a multi-staged algorithm of observation correlation and subsequent orbit determination. Results are presented for single processing steps by example of optical telescope observations of satellites in MEO and GEO.
Software is a vital part of modern research. The competence to develop sustainable software becom... more Software is a vital part of modern research. The competence to develop sustainable software becomes increasingly important for research organizations. The DLR-a large research organization in Germany-has set up a software engineering initiative to address typical obstacles in this regard such as missing long-term funding, lack of incentives, or missing knowledge about essential software development practices. In this paper, we describe the concept and activities of the initiative as well as discuss the impact of these activities on the identified obstacles. CCS CONCEPTS • Software and its engineering → Software creation and management; Maintaining software; Collaboration in software development;
ZusammenfassungGroße zylindrische Stahlprüflinge werden mittels der Methode der finiten Differenz... more ZusammenfassungGroße zylindrische Stahlprüflinge werden mittels der Methode der finiten Differenzen im Zeitbereich (engl.
Die Grundsätze für die "gute wissenschaftliche Praxis" [1] gelten als in der Forschung ... more Die Grundsätze für die "gute wissenschaftliche Praxis" [1] gelten als in der Forschung allgemein akzeptiert: der Erkenntnisweg soll gesichert und nachvollziehbar, Ergebnisse sollen unabhängig reproduzierbar und Grundlagen, Zwischenergebnisse und Resultate sollen dokumentiert und sichtbar sein. In vielen Bereichen der Wissenschaft wird Software eingesetzt, um den Erkenntnisprozess zu unterstützen. Um den Grundsätzen zu genügen, muss der Einsatz dieser Software ebenfalls sichtbar und nachvollziehbar sein. Am Deutschen Zentrum für Luft- und Raumfahrt e.V. (DLR) steht den wissenschaftlichen Mitarbeitenden bereits eine umfangreiche Infrastruktur zur Verfügung, die bei der nachvollziehbaren Entwicklung wissenschaftlicher Software unterstützt [2]. Dadurch wird auch die Zusammenarbeit von Instituten sowohl im Projektkontext als auch bei Inner- und Open-Source-Entwicklungen unterstützt. Allerdings gibt es bisher kein Verzeichnis, welches umfassend und vollständig die Sichtbarkeit u...
Als Research Software Engineers sind wir verantwortlich dafür, Forschungssoftware nachhaltig zu e... more Als Research Software Engineers sind wir verantwortlich dafür, Forschungssoftware nachhaltig zu entwickeln. Was aber sind die Voraussetzungen dafür, dass dies in der Praxis auch gelingt? Welchen Einfluss haben Aspekte der Bereitstellung und Pflege von Software? Welche Rolle spielen verschiedene Stakeholder an Forschungssoftware: Forschungsinstitutionen, Förderer, Bibliotheken, Repositories und Archive, Rechenzentren, Infrastrukturen, etc.? Was sind Aspekte von Nachhaltigkeit, allgemein und spezifisch für die deutsche Forschungslandschaft? Nach einem kurzen Impulsvortrag aus dem deRSE19-Workshop Herausforderungen für die nachhaltige Entwicklung, Bereitstellung und Pflege von Forschungssoftware in Deutschland diskutieren wir diese und andere Fragen mit dem Expertenpanel: Matthias Katerbow (Deutsche Forschungsgemeinschaft) Anna-Lena Lamprecht (Universiteit Utrecht) Katrin Leinweber (Technische Informationsbibliothek Hannover) Michael Meinel (Deutsches Zentrum für Luft- und Raumfahrt) A...
In aerospace engineering, as well as in many other disci-plines, many software tools are develope... more In aerospace engineering, as well as in many other disci-plines, many software tools are developed. Often, it is hard to get an overview of already existing software. Sometimes this leads to multiple development of software, if nobody is able to determine whether a software for a specific tasks exist already or not. Therefore, in companies and organi-zations there is a need for a directory of exiting software. The German Aerospace Center has built such a directory based on the Open Source software Allura, which is the base software that drives the Open Source hosting platform SourceForge.net. Allura has been customized to the needs of the aerospace domain. The result is a software portal for the aerospace research community, that allow to register and categorize software. It is intendend to be used both for Open Source and proprietary software. Employees of the German Aerospace Center as well as the public can search for existing software. This reduces the amount of software develop...
For a better understanding of the space environment and for safe and secure satellite operations,... more For a better understanding of the space environment and for safe and secure satellite operations, the German Space Operation Center (GSOC) together with the Astronomical Institute of the University of Bern (AIUB) have established SMARTnet™. Its main purpose is to act as an exchange platform for observational data of resident space objects. Its operation started in 2017 with telescope stations located in Switzerland and South Africa, and it was opened for international cooperation and exchange afterwards. Its first international Partner, Applied Defense Solutions, joined SMARTnet™ in 2018. In this paper, an overview of data of SMARTnet™, Partners, and statistics are given. To achieve the aforementioned objectives of research and safe operations, the Backbone Catalogue of Relational Debris Information (BACARDI) was invented, designed, and implemented. This is a joint effort of DLR’s Institute of Simulation and Software Technology (SC) together with GSOC. BACARDI is mainly divided into...
This packages contains all sources that are required to generate the paper. Especially the benchm... more This packages contains all sources that are required to generate the paper. Especially the benchmarks are included.
In this paper the FlowSimulator framework for multidisciplinary computational fluid dynamics simu... more In this paper the FlowSimulator framework for multidisciplinary computational fluid dynamics simulations on high performance computer platforms is described. An overview of the provided functionality is given and possible benefits for tool developers as well as design engineers are presented.
6th European Conference on Space Debris, Aug 1, 2013
The history of space surveillance by ground based optical telescopes goes back to the early days ... more The history of space surveillance by ground based optical telescopes goes back to the early days of spaceflight. Since the beginning, detection of uncatalogued space objects faces the difficulty of initial orbit determination from angles only observations within a limited time period. Multiple short arc data sets have to be combined to calculate orbital elements with sufficient accuracy. For this purpose, the hypotheses have to be tested that one or more short arc measurements belong to the same object. Solving this correlation or object identification problem efficiently becomes more urgent than ever before with the increasing space object population. The described correlation problem is set up on a large scale by observation simulations for a global network of six robotic telescopes over one month. This survey generates more than 12.000 short arc data sets called tracklets from 1.027 objects in near geostationary orbits (GEO). Initial orbital elements are determined from the short arc measurements applying a circular orbit assumption. Based on the orbital elements, a hypotheses filter for pair and triple tracklet combinations is presented. The newly developed pair filter features high filter rates with simultaneously low filter errors at a negligible computational effort. It is therefore recommended as a pre-filtering stage for more complex correlation methods like recent approaches that utilize the admissible region concept.
For a better understanding of the space environment and for safe and secure satellite operations,... more For a better understanding of the space environment and for safe and secure satellite operations, the German Space Operation Center (GSOC) together with the Astronomical Institute of the University of Bern (AIUB) have established SMARTnet™. Its main purpose is to act as an exchange platform for observational data of resident space objects. Its operation started in 2017 with telescope stations located in Switzerland and South Africa, and it was opened for international cooperation and exchange afterwards. Its first international Partner, Applied Defense Solutions, joined SMARTnet™ in 2018. In this paper, an overview of data of SMARTnet™, Partners, and statistics are given. To achieve the aforementioned objectives of research and safe operations, the Backbone Catalogue of Relational Debris Information (BACARDI) was invented, designed, and implemented. This is a joint effort of DLR’s Institute of Simulation and Software Technology (SC) together with GSOC. BACARDI is mainly divided into a data base, containing data and their respective meta data as well as processors for e. g. orbit determination, object correlation, or orbit propagation. In this paper, an overview of the architecture of BACARDI is shown, and the concept of the processing chains is presented. For resident space objects, a 3D visualization tool was designed and implemented by SC. Its capabilities and potentialities are demonstrated.
In a joint project of the DLR Institute for Simulation and Software Technology and DLR Space Oper... more In a joint project of the DLR Institute for Simulation and Software Technology and DLR Space Operations and Astronaut Training develop methods for space surveillance. The main objective of the project is to develop an orbital database for objects in Earth orbitcalled the Backbone Catalogue of Relational Debris Information (BACARDI). The research topics are object identification form different sensor observations, orbit determination and orbit propagation including state vector and state uncertainty. Main applications of the orbital database will be close approach prediction for collision avoidance-further on re-entry prediction, detection of satellite manoeuvres and on-orbit fragmentations. In this paper an introduction is given to the space object catalogue BACARDI. All information imported, processed and exported is stored within a relational database. A self-developed middleware provides the functionality for distributed computations on a scalable network of hardware devices. The data processing chain consists of a multi-staged algorithm of observation correlation and subsequent orbit determination. Results are presented for single processing steps by example of optical telescope observations of satellites in MEO and GEO.
Software is a vital part of modern research. The competence to develop sustainable software becom... more Software is a vital part of modern research. The competence to develop sustainable software becomes increasingly important for research organizations. The DLR-a large research organization in Germany-has set up a software engineering initiative to address typical obstacles in this regard such as missing long-term funding, lack of incentives, or missing knowledge about essential software development practices. In this paper, we describe the concept and activities of the initiative as well as discuss the impact of these activities on the identified obstacles. CCS CONCEPTS • Software and its engineering → Software creation and management; Maintaining software; Collaboration in software development;
ZusammenfassungGroße zylindrische Stahlprüflinge werden mittels der Methode der finiten Differenz... more ZusammenfassungGroße zylindrische Stahlprüflinge werden mittels der Methode der finiten Differenzen im Zeitbereich (engl.
Die Grundsätze für die "gute wissenschaftliche Praxis" [1] gelten als in der Forschung ... more Die Grundsätze für die "gute wissenschaftliche Praxis" [1] gelten als in der Forschung allgemein akzeptiert: der Erkenntnisweg soll gesichert und nachvollziehbar, Ergebnisse sollen unabhängig reproduzierbar und Grundlagen, Zwischenergebnisse und Resultate sollen dokumentiert und sichtbar sein. In vielen Bereichen der Wissenschaft wird Software eingesetzt, um den Erkenntnisprozess zu unterstützen. Um den Grundsätzen zu genügen, muss der Einsatz dieser Software ebenfalls sichtbar und nachvollziehbar sein. Am Deutschen Zentrum für Luft- und Raumfahrt e.V. (DLR) steht den wissenschaftlichen Mitarbeitenden bereits eine umfangreiche Infrastruktur zur Verfügung, die bei der nachvollziehbaren Entwicklung wissenschaftlicher Software unterstützt [2]. Dadurch wird auch die Zusammenarbeit von Instituten sowohl im Projektkontext als auch bei Inner- und Open-Source-Entwicklungen unterstützt. Allerdings gibt es bisher kein Verzeichnis, welches umfassend und vollständig die Sichtbarkeit u...
Als Research Software Engineers sind wir verantwortlich dafür, Forschungssoftware nachhaltig zu e... more Als Research Software Engineers sind wir verantwortlich dafür, Forschungssoftware nachhaltig zu entwickeln. Was aber sind die Voraussetzungen dafür, dass dies in der Praxis auch gelingt? Welchen Einfluss haben Aspekte der Bereitstellung und Pflege von Software? Welche Rolle spielen verschiedene Stakeholder an Forschungssoftware: Forschungsinstitutionen, Förderer, Bibliotheken, Repositories und Archive, Rechenzentren, Infrastrukturen, etc.? Was sind Aspekte von Nachhaltigkeit, allgemein und spezifisch für die deutsche Forschungslandschaft? Nach einem kurzen Impulsvortrag aus dem deRSE19-Workshop Herausforderungen für die nachhaltige Entwicklung, Bereitstellung und Pflege von Forschungssoftware in Deutschland diskutieren wir diese und andere Fragen mit dem Expertenpanel: Matthias Katerbow (Deutsche Forschungsgemeinschaft) Anna-Lena Lamprecht (Universiteit Utrecht) Katrin Leinweber (Technische Informationsbibliothek Hannover) Michael Meinel (Deutsches Zentrum für Luft- und Raumfahrt) A...
In aerospace engineering, as well as in many other disci-plines, many software tools are develope... more In aerospace engineering, as well as in many other disci-plines, many software tools are developed. Often, it is hard to get an overview of already existing software. Sometimes this leads to multiple development of software, if nobody is able to determine whether a software for a specific tasks exist already or not. Therefore, in companies and organi-zations there is a need for a directory of exiting software. The German Aerospace Center has built such a directory based on the Open Source software Allura, which is the base software that drives the Open Source hosting platform SourceForge.net. Allura has been customized to the needs of the aerospace domain. The result is a software portal for the aerospace research community, that allow to register and categorize software. It is intendend to be used both for Open Source and proprietary software. Employees of the German Aerospace Center as well as the public can search for existing software. This reduces the amount of software develop...
For a better understanding of the space environment and for safe and secure satellite operations,... more For a better understanding of the space environment and for safe and secure satellite operations, the German Space Operation Center (GSOC) together with the Astronomical Institute of the University of Bern (AIUB) have established SMARTnet™. Its main purpose is to act as an exchange platform for observational data of resident space objects. Its operation started in 2017 with telescope stations located in Switzerland and South Africa, and it was opened for international cooperation and exchange afterwards. Its first international Partner, Applied Defense Solutions, joined SMARTnet™ in 2018. In this paper, an overview of data of SMARTnet™, Partners, and statistics are given. To achieve the aforementioned objectives of research and safe operations, the Backbone Catalogue of Relational Debris Information (BACARDI) was invented, designed, and implemented. This is a joint effort of DLR’s Institute of Simulation and Software Technology (SC) together with GSOC. BACARDI is mainly divided into...
This packages contains all sources that are required to generate the paper. Especially the benchm... more This packages contains all sources that are required to generate the paper. Especially the benchmarks are included.
Uploads
Papers by Michael Meinel