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  • richardmitnick 11:59 am on July 11, 2013 Permalink | Reply
    Tags: , , ESA Galileo   

    From ESA: “Galileo spreads its wings” 

    ESASpaceForEuropeBanner
    European Space Agency

    11 July 2013
    No Writer Credit

    “Deployment of the solar wings on the latest Galileo satellite is shown being checked at ESA’s technical hub in the Netherlands. The navigation satellite’s pair of 1 x 5 m solar wings, carrying more than 2500 state-of-the-art gallium arsenide solar cells, will power the satellite during its 12-year working life.

    wings
    Galileo FOC solar wing deployment. No image credit

    A counterweighted rig supports the deployment, otherwise the delicate fold-out wings – designed for the weightlessness of space – would crumple under the pull of Earth gravity.

    With the first four Galileo ‘In-Orbit Validation’ satellites already in orbit, this is the first of the rest of Europe’s satnav constellation.

    These Full Operational Capability satellites provide the same operational services as their predecessors, but they are built by a new industrial team: OHB in Bremen, Germany build the satellites with Surrey Satellite Technology Ltd in Guildford, UK contributing the navigation payloads.

    There are also a lot more of them: this satellite is only the first of 22 ordered from OHB. It arrived at ESA’s ESTEC research and technical centre in Noordwijk in mid-May to begin a rigorous campaign of testing in simulated launch and space conditions, guaranteeing its readiness for launch.”

    See the full article here.

    The European Space Agency (ESA), established in 1975, is an intergovernmental organization dedicated to the exploration of space, currently with 19 member states. Headquartered in Paris, ESA has a staff of more than 2,000. ESA’s space flight program includes human spaceflight, mainly through the participation in the International Space Station program, the launch and operations of unmanned exploration missions to other planets and the Moon, Earth observation, science, telecommunication as well as maintaining a major spaceport, the Guiana Space Centre at Kourou, French Guiana, and designing launch vehicles. ESA science missions are based at ESTEC in Noordwijk, Netherlands, Earth Observation missions at ESRIN in Frascati, Italy, ESA Mission Control (ESOC) is in Darmstadt, Germany, the European Astronaut Centre (EAC) that trains astronauts for future missions is situated in Cologne, Germany, and the European Space Astronomy Centre is located in Villanueva de la Cañada, Spain.

    ESA Technology


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  • richardmitnick 7:20 am on March 13, 2013 Permalink | Reply
    Tags: , , ESA Galileo   

    From ESA: “Galileo fixes Europe’s position in history” 

    ESASpaceForEuropeBanner
    European Space Agency

    12 March 2013
    No Writer Credit

    Europe’s new age of satellite navigation has passed a historic milestone – the very first determination of a ground location using the four Galileo satellites currently in orbit together with their ground facilities.

    ESA Galileo Spacecraft
    Galileo

    This fundamental step confirms the Galileo system works as planned.

    A minimum of four satellites is required to make a position fix in three dimensions. The first two were launched in October 2011, with two more following a year on.

    ‘Once testing of the latest two satellites was complete, in recent weeks our effort focused on the generation of navigation messages and their dissemination to receivers on the ground, explained Marco Falcone, ESA’s Galileo System Manager.

    This first position fix of longitude, latitude and altitude took place at the Navigation Laboratory at ESA’s technical heart ESTEC, in Noordwijk, the Netherlands on the morning of 12 March, with an accuracy between 10 and 15 metres – which is expected taking into account the limited infrastructure deployed so far.”

    gal

    See the full article here.

    The European Space Agency (ESA), established in 1975, is an intergovernmental organization dedicated to the exploration of space, currently with 19 member states. Headquartered in Paris, ESA has a staff of more than 2,000. ESA’s space flight program includes human spaceflight, mainly through the participation in the International Space Station program, the launch and operations of unmanned exploration missions to other planets and the Moon, Earth observation, science, telecommunication as well as maintaining a major spaceport, the Guiana Space Centre at Kourou, French Guiana, and designing launch vehicles. ESA science missions are based at ESTEC in Noordwijk, Netherlands, Earth Observation missions at ESRIN in Frascati, Italy, ESA Mission Control (ESOC) is in Darmstadt, Germany, the European Astronaut Centre (EAC) that trains astronauts for future missions is situated in Cologne, Germany, and the European Space Astronomy Centre is located in Villanueva de la Cañada, Spain.


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