Search

6 results found
General Relativity Experiment with Galileo satellites 5 and 6 (GREAT)

We report on a new test of the gravitational redshift and thus of local position invariance, an integral part of the Einstein equivalence principle, which is the foundation of general relativity and all metric theories of gravitation. We use data spanning 1008 days from two satellites of Galileo, Europe’s global satellite navigation system (GNSS), which were launched in 2014, but accidentally delivered into elliptic rather than circular orbits. The resulting modulation of the gravitational redshift of the onboard atomic clocks allows the determination of redshift with high accuracy.

France

15/710

SYRTE
High-Altitude pseudo-satellites for telecommunication and complementary space applications

The interest in HAPS is increasing in many areas, from military and security to commercial services. On the telecommunications side, HAPS are seen as relays to provide internet services worldwide, and as a possible complement to satellites. On the Earth observation side, the near-space location of the HAPS enables new services or could improve the existing satellite ones. From the satellite or from the HAPS market sides, it is important to understand how both systems can offer complementary services, and what the possible synergies between them are.

France

15/708-b

Airbus Defence &...
Feasibility study of Active Debris Mitigation for Mega Constellations

The Thales Alenia Space study team completed a 13 month contract to study the feasibility of Active Debris Removal within mega-constellations. Within the Clean Space initiative, ESA searches for proactive answers to the environmental challenges which are faced both on Earth and in space. The Inter-Agency Space Debris Coordination Committee (IADC) has already highlighted the important topic of mega-constellations, which represent a step change in the future space environment due to the proliferation of small satellites.

France

15/099

Thales Alenia Space
Feasibility of ultra low thrust transfers in L1, L2, Sun, Earth & Moon Systems

A set of tools has been developed to enable assessment of the feasibility of ultra-low thrust transfers in regions of multi-body gravity field influence. Aspects include:

France

15/723-a

Airbus Defence &...
Concept Development of EVA Operationsin EAC Neutral Buoyancy Facility for Extra-terrestrial Surface Explorations. (Moondive)

The International Space Station (ISS) is slowly approaching the end of its mission. The European Space Agency (ESA) and its international partners are considering new mission targets for the future of human space exploration in the post-ISS era. Highest ranked on the list of potential targets are a return to the Moon, Near-Earth Objects or asteroids, the moons of Mars (Phobos, Deimos) and, as the ultimate target, the surface of Mars.

France

13-039

COMEX SA
Shock Release system classification

Experience shows that shock specifications for release systems provided by suppliers rely on different test methods and test setups. As a consequence the specified SRS are not comparable and compliance statements given in proposal phases can still impose some risk. The selection of the release system thus strongly depends on individual experience and heritage.The objective is the definition of a standardised test setup for release systems, are the generation of a shock test database which includes most used releases systems (pyro and non-pyro).

France

T720-305MS

THALES ALENIA SPACE...

Filter by programme:

Filter by start year:

Filter by end year:

Filter by keywords:

Filter by contractor:

Filter by country:

Filter by application domain:

Filter by competence domain:

Filter by technology domain:

Filter by status: