The European Space Agency (ESA) has confirmed that the pioneering Medium-Earth Orbit satellite is a 'full mission success' and has contracted Surrey Satellite Technology Limited (SSTL), a spin out from the University of Surrey, to continue operations for an additional year as the satellite continues to perform and provide valuable Galileo services.
Under a €28M contract, the 660kg satellite was developed by SSTL for ESA. The satellite was designed, built and tested in a rapid (30 month) programme and was launched, on schedule, on 28 December 2005.
The primary mission was to secure the Galileo frequency filings at the International Telecommunications Union (ITU). The satellite also played a crucial role as a test-bed for the Galileo payload units, providing a representative signal-in-space for ground-based experimentation with Galileo signals and characterizing the radiation environment for the Medium Earth Orbit (MEO) which will be used by all future Galileo satellites.
Following successful launch and commissioning, the GIOVE-A team undertook an intensive six-week payload in-orbit test (IOT) campaign using the 25m dish at the Science Technology and Facilities Council (STFC) Chilbolton station. Through these activities ESA was able to claim the frequency filings three months before the license expired.
Since commissioning the satellite has achieved a remarkably high operational availability with signals being broadcast for 99.8% of the time over the last year. The primary atomic clock, fundamental to all future Galileo satellites in providing highly accurate positioning and time reference signals, has been operating continuously since June 2007.
Thirteen sensor stations around the world are used by ESA to track GIOVE-A and GPS navigation signals and these have demonstrated that Galileo will be a highly accurate navigation system.
In addition to plaudits from ESA, the European Union and the navigation user community, SSTL’s GIOVE-A team has been recognised with the prestigious Royal Aeronautical Society’s (RAeS) Team Silver Award, as well as the Geoffrey Pardoe Space Award for an exceptional contribution to space, demonstrating first class risk and project management skills in designing and placing into orbit a complex, yet cost-effective satellite. The RAeS awards are considered the most prestigious and long-standing awards in global aerospace honouring achievement, innovation and excellence.
Stuart Miller | alfa
Information integration and artificial intelligence for better diagnosis and therapy decisions
24.05.2017 | Fraunhofer MEVIS - Institut für Bildgestützte Medizin
World's thinnest hologram paves path to new 3-D world
18.05.2017 | RMIT University
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
26.05.2017 | Life Sciences
26.05.2017 | Life Sciences
26.05.2017 | Physics and Astronomy