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7. Flight demonstration of formation flying capabilities for future missions (NEAT Pathfinder)

Author

Delpech, M., Malbet, F., Karlsson, T., Larsson, R., Léger, A., and Jorgensen, J.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

PRISMA is a demonstration mission for formation-flying and on-orbit-servicing critical technologies that involves two spacecraft launched in low Earth orbit in June 2010 and still in operation. Funded by the Swedish National Space Board, PRISMA mission has been developed by OHB Sweden with important contributions from the German Aerospace Centre (DLR/GSOC), the French Space Agency (CNES), and the Technical University of Denmark (DTU). The paper focuses on the last CNES experiment achieved in September 2012 that was devoted to the preparation of future astrometry missions illustrated by the NEAT and microNEAT mission concepts. The experiment consisted in performing the type of formation maneuvers required to point the two-satellite axis to a celestial target and maintain it fixed during the observation period. Achieving inertial pointing for a LEO formation represented a new challenge given the numerous constraints from propellant usage to star tracker blinding. The paper presents the experiment objectives in relation with the NEAT/microNEAT mission concept, describes its main design features along with the guidance and control algorithms evolutions and discusses the results in terms of performances achieved during the two rehearsals, Comment: 16 pages, in Proc. of the 7th International Workshop on "Satellite Constellation and Formation Flying" held in Lisbon (Portugal), 13-15 March 2013

Published
2013
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33. Coordination of water policies for quality and quantity:experiences from Nordic and Baltic countries

Author

Larsson, R. (Rolf), Belinskij, A. (Antti), Kløve, B. (Bjørn), Meilutyte-Lukauskiene, D. (Diana), Lode, E. (Elve), Skarbøvik, E. (Eva), Akstinas, V. (Vytautas), Larsson, R. (Rolf), Belinskij, A. (Antti), Kløve, B. (Bjørn), Meilutyte-Lukauskiene, D. (Diana), Lode, E. (Elve), Skarbøvik, E. (Eva), and Akstinas, V. (Vytautas)

Abstract

The European Union (EU) Water Framework Directive is of paramount importance for water management. According to the legal text, coordination with other directives like the Floods Directive is imperative and motivated by potential synergy effects. In this paper, the degree to which such coordination is achieved is evaluated for five Nordic and Baltic countries. The evaluation is based on legal documents, management plans, as well as on organizational structure in the five countries. The results show that the coordination between the Water Framework Directive and the Floods Directive (or flood management for Norway’s case), have been successful for Estonia and Lithuania, whereas Norway, Finland, and especially Sweden need to improve more.

Published
2022

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