European Space Agency´s Hibernation (Torpor) strategy for Deep Space Missions: linking biology to engineering

2021 ◽  
Author(s):  
Alexander Choukér ◽  
Thu Jennifer Ngo-Anh ◽  
Robin Biesbroek ◽  
Gerhard Heldmaier ◽  
Marc Heppener ◽  
...  
Keyword(s):  
European Space Agency ◽  
Space Missions ◽  
Deep Space ◽  
Space Agency

Galileo Case Study

2013 ◽  
pp. 251-282
Author(s):  
Aggelos Liapis ◽  
Evangelos Argyzoudis
Keyword(s):  
Data Exchange ◽  
Collaborative Work ◽  
Effective Interaction ◽  
European Space Agency ◽  
Space Missions ◽  
Working Environment ◽  
Task Forces ◽  
Space Agency ◽  
Future Space ◽  
Collaborative Working

The Concurrent Design Facility (CDF) of the European Space Agency (ESA) allows a team of experts from several disciplines to apply concurrent engineering for the design of future space missions. It facilitates faster and effective interaction of all disciplines involved, ensuring consistent and high-quality results. It is primarily used to assess the technical and financial feasibility of future space missions and new spacecraft concepts, though for some projects, the facilities and the data exchange model are used during later phases. This chapter focuses on the field of computer supported collaborative work (CSCW) and its supporting areas whose mission is to support interaction between people, using computers as the enabling technology. Its aim is to present the design and implementation framework of a semantically driven, collaborative working environment (CWE) that allows ESA’s CDF to be used by projects more extensively and effectively during project meetings, task forces, and reviews.

scholarly journals The Hipparcos Catalogue: 10th anniversary and its legacy

2007 ◽  
Vol 3 (S248) ◽  
pp. 1-7
Author(s):  
C. Turon ◽  
F. Arenou
Keyword(s):  
Historical Perspective ◽  
European Space Agency ◽  
Space Missions ◽  
Basic Principles ◽  
10Th Anniversary ◽  
Science Programme ◽  
Space Agency ◽  
Hipparcos Catalogue ◽  
Giant Step ◽  
And Performance

AbstractThe European Space Agency decision to include the Hipparcos satellite into its Science Programme is placed in the context of the years 1965-1980 and in the historical perspective of the progress of astrometry. The motivation and ideas which lead to the Hipparcos design are reviewed as well as its characteristics and performance. The amount and variety of applications represent an impressive evolution from the original science case and opened the way to much more ambitious further space missions, especially Gaia, based on the same basic principles. A giant step in technology led to a giant step in science. Next steps are presented at this Symposium.

Future Architectures for European Space Agency Deep-Space Ground Stations [Antenna Applications Corner]

2012 ◽  
Vol 54 (1) ◽  
pp. 254-263 ◽  
Author(s):  
M. Bozzi ◽  
M. Cametti ◽  
M. Fornaroli ◽  
P. Maguire ◽  
S. Marti ◽  
...  
Keyword(s):  
European Space Agency ◽  
Deep Space ◽  
Space Agency

scholarly journals Implementation of a Cryogenic Facility for Space Debris Analysis

2021 ◽  
Vol 11 (3) ◽  
pp. 948
Author(s):  
Paulo Gordo ◽  
Tiago Frederico ◽  
Rui Melicio ◽  
António Amorim
Keyword(s):  
Space Debris ◽  
Vacuum Ultraviolet ◽  
European Space Agency ◽  
Space Missions ◽  
Low Earth Orbit ◽  
Material Degradation ◽  
Pressure Sensitive Adhesive ◽  
Material Evaluation ◽  
Space Agency ◽  
Earth Orbits

This paper has resulted from a continued study of spacecraft material degradation and space debris formation. The design and implementation of a thermal vacuum cycling cryogenic facility for the evaluation of space debris generation at a low Earth orbit (LEO) is presented. The facility used for spacecraft external material evaluation is described, and some of the obtained results are presented. The infrastructure was developed in the framework of a study for the European Space Agency (ESA). The main purpose of the cryogenic facility is to simulate the LEO spacecraft environment, namely thermal cycling and vacuum ultraviolet (VUV) irradiation to simulate the spacecraft material degradation and the generation of space debris. In a previous work, some results under LEO test conditions showed the effectiveness of the cryogenic facility for material evaluation, namely: the degradation of satellite paints with a change in their thermo-optical properties, leading to the emission of cover flakes; the degradation of the pressure-sensitive adhesive (PSA) used to glue Velcro’s to the spacecraft, and to glue multilayer insulation (MLI) to the spacecraft’s. The paint flakes generated are space debris. Hence, in a scenario of space missions where a spacecraft has lost the thermal shielding capability, the failure of PSA tape and the loss of Velcro properties may contribute to the release of the full MLI blanket, contributing to the generation of space debris that presents a growing threat to space missions in the main Earth orbits.

Pointing enhancement techniques for deep-space antennas

2010 ◽  
Vol 2 (2) ◽  
pp. 211-218 ◽  
Author(s):  
Piermario Besso ◽  
Maurizio Bozzi ◽  
Marco Formaggi ◽  
Luca Perregrini
Keyword(s):  
Computing Time ◽  
European Space Agency ◽  
Antenna Gain ◽  
Deep Space ◽  
Space Antenna ◽  
Space Agency ◽  
Space Antennas ◽  
Pointing Accuracy ◽  
Beam Waveguide ◽  
The One

The present paper presents a very efficient technique for enhancing the pointing accuracy in beam-waveguide (BWG) antennas and its application to the deep space antenna DSA2 of the European Space Agency. The proposed technique permits to achieve a twofold result: on the one hand, it provides a solution to the beam aberration issue, arising when the antenna simultaneously receives from and transmits to a spacecraft moving in the transversal direction. On the other hand, it allows to perform a fast conical scan to enhance the pointing accuracy of the antenna. Both results are achieved by simple linear displacements of feeds and mirrors located in the lower part of the BWG, with a very limited deterioration of the antenna gain. The required displacements of feeds and mirrors are determined through a fast optimization algorithm, based on a top-down approach, which requires repeated physical–optics analyses of the lower part of the beam waveguide only, with a significant reduction in the computing time.

scholarly journals Hardware Prototyping and Validation of a W-ΔDOR Digital Signal Processor

2019 ◽  
Vol 9 (14) ◽  
pp. 2909 ◽  
Author(s):  
Gian Carlo Cardarilli ◽  
Luca Di Nunzio ◽  
Rocco Fazzolari ◽  
Daniele Giardino ◽  
Marco Matta ◽  
...  
Keyword(s):  
Digital Signal Processor ◽  
European Space Agency ◽  
Digital Signal ◽  
Space Mission ◽  
Radio Link ◽  
Deep Space ◽  
Noise Sources ◽  
Backward Compatibility ◽  
Space Agency ◽  
Spacecraft Tracking

Microwave tracking, usually performed by on ground processing of the signals coming from a spacecraft, represents a crucial aspect in every deep-space mission. Various noise sources, including receiver noise, affect these signals, limiting the accuracy of the radiometric measurements obtained from the radio link. There are several methods used for spacecraft tracking, including the Delta-Differential One-Way Ranging ( Δ DOR) technique. In the past years, European Space Agency (ESA) missions relied on a narrowband Δ DOR system for navigation in the cruise phase. To limit the adverse effect of nonlinearities in the receiving chain, an innovative wideband approach to Δ DOR measurements has recently been proposed. This work presents the hardware implementation of a new version of the ESA X/Ka Deep Space Transponder based on the new tracking technique named Wideband Δ DOR (W- Δ DOR). The architecture of the new transponder guarantees backward compatibility with narrowband Δ DOR.

Жизнеобеспечение экипажа пилотируемого космического объекта, проблемы управления

2019 ◽  
pp. 109-120
Author(s):  
Boris F. ZARETSKIY ◽  
Arkadiy S. GUZENBERG ◽  
Igor A. SHANGIN
Keyword(s):  
Control System ◽  
Life Support ◽  
Support Systems ◽  
Space Missions ◽  
Automated System ◽  
Deep Space ◽  
Automated Control ◽  
Life Support Systems ◽  
Long Duration ◽  
Space Life Support

Life support for first manned spaceflights was based on supplies of consumables. Crew life support systems based on supplies of water and oxygen, in spite of their simplicity, are extremely inefficient in orbital space missions and are unfeasible in deep space missions because of mass and volume constraints. Therefore, there are currently developed and are to be used on space stations the life support systems that are based on chemical and physical regeneration of water and oxygen extracted from human waste. In view of further advances in long-duration orbital stations, and the prospects of establishment of planetary outposts and deep space exploration, the problem of constructing an automated system for controlling a suite of regenerative LSS becomes urgent. The complexity of solving the problem of constructing an efficient control system in this case owes to the existence of a large number of effectiveness criteria. The paper proposes a system of consolidated global efficiency criteria, which allows to break up this problem into a series of sub-problems of optimization in order to solve this problem. The proposed criteria are longevity, cost, comfort. The paper presents a series of specific examples of using the proposed principles with necessary generalizations. Key words: space life support systems, atmosphere revitalization equipment, automated control system, global generalized efficiency criteria, longevity, cost, comfort.

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