Détail de l'auteur
Auteur Tim Flohrer |
Documents disponibles écrits par cet auteur (1)
![](./images/expand_all.gif)
![](./images/collapse_all.gif)
![Tris disponibles](./images/orderby_az.gif)
Titre : Optical survey strategies and their application to space surveillance Type de document : Rapport Auteurs : Tim Flohrer, Auteur Editeur : Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse Année de publication : 2012 Collection : Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 87 Importance : 178 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-908440-34-5 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] débris spatial
[Termes IGN] orbitographie
[Termes IGN] stratégie
[Termes IGN] surveillanceIndex. décimale : 30.84 Applications de géodésie spatiale à l'atmosphère Résumé : (Editeur) [préface] This publication of Tim Flohrer focuses on strategies to search for space debris using optical observations and on the application of these strategies for space surveillance. The topic covers a wide range of aspects, starting with the actual detection of space debris on frames acquired by optical telescopes, and ending with the build-up and maintenance of a catalogue of orbit of these objects. An optimum search strategy aims at maximizing the number of observed objects of a reference population defined by the sizes and the orbital elements of the objects, by optimizing the observations sequences of telescopes at one or several sites. The design of the strategies must take into account geometrical boundary conditions – the objects must be visible from a given site – as well as radiometric constraints – the objects must be bright enough to be detected against the sky background. The build-up and maintenance of an orbit catalogue require periodic acquisition of astrometric positions of the catalogue objects. This may be achieved either by scheduling dedicated follow-up observations or by designing survey strategies in a way that enough observations of all objects are gained “incidentally”. All of the above-mentioned aspects are discussed in this publication. The author developed a software tool allowing to simulate search and observation strategies starting with the generation of individual observations and ending with a full orbit determination. This combination is rather unique and was a key element for the success of the strategies developed by Tim Flohrer. In addition to strategies for ground-based networks of telescopes the paper discusses concepts for the search of small size debris and for surveys of entire orbit regions using space-based optical sensors. The strategies to search for and monitor objects in the geostationary ring and the region of the global navigation satellite systems presented in this work became widely recognized in the scientific community. Concepts currently developed in the framework of the ESA initiative to establish an European space surveillance and tracking system are based to a great extent on Tim Flohrer’s work. Note de contenu : 1. Introduction and motivation
2. Space situational awareness, space debris, and space surveillance principles
2.1 Space situational awareness
2.2 Space surveillance
2.3 Space debris and its lifecycle
2.4 Space surveillance principles
2.5 Sensors with space surveillance capabilities
3. Observation fundamentals, data reduction, and orbit modelling
3.1 Reference systems
3.2 Orbital regimes
3.3 Observations
3.4 Orbits of artificial satellites
3.5 Two-line element (TLE) sets
4. Simulation environment for optical observations
4.1 PROOF
4.2 CelMech
4.3 Simulation environment
4.4 Application of the simulation environment to a proposed space-based optical observation scenario
4.5 Conclusions
5. Ground-based optical observation strategies
5.1 Population evolution
5.2 Accessibility of population
5.3 Proposed observation strategies
6. A system proposal for space-based optical space surveillance
6.1 SSA-related observation strategies with the SBO architecture
6.2 Radiometric characteristics of the SBO observing high altitudes
6.3 Coverage of reference populations
6.4 Orbit determination based on simulations
6.5 Conclusion
7. Conclusion and recommendations
A. Performance of initial orbit determination from space-based observations
B. Simulated orbit determination results for a system proposal for space-based optical space surveillanceNuméro de notice : 15701 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Rapport de recherche En ligne : https://www.sgc.ethz.ch/sgc-volumes/sgk-87.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62764 Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 15701-01 30.84 Livre Centre de documentation Géodésie Disponible