The Alphasat programme is a major cooperation between the public and private sectors. With Alphasat, Inmarsat will be the first commercial customer for the Alphabus platform, the new European high-power telecommunications platform jointly developed by Astrium and Thales Alenia Space and initiated by a partnership between ESA and CNES (Centre National d'Etudes Spatiales) as a coordinated European response to the increased market demand for larger telecommunication payloads, for new broadband, broadcasting and mobile communications services.
The Alphabus Alphasat programme represents an expenditure of € 440 million by 16 ESA Member States. Under the development schedule, Alphasat will be available for launch in 2012.
Positioned at 25 degrees East, providing extended coverage to Africa, Europe, the Middle-East and parts of Asia , Alphasat will supplement the existing Inmarsat satellite constellation and offer the opportunity for new and advanced services.
Astrium Satellites is the industrial prime contractor for the development of the satellite, including its advanced L-Band mission, which will augment the successful services already being offered by Inmarsat's Broadband Global Area Network (BGAN). Key to the implementation of this payload is the advanced Integrated Processor, being developed by Astrium Satellites in the UK, which will provide payload flexibility enabling full coverage reconfiguration and flexible power allocation.
Thanks to this increased efficiency of spectrum use and payload flexibility the Alphasat will further enable robust communications in crisis and disaster emergencies, allowing potential connection of houses, schools and businesses in remote locations and communications links for governments with dispersed populations and improve essential voice and data communications for a wide range of industry sectors such as media, maritime, oil and gas.
For this application, the flexibility of the Alphabus platform design will be demonstrated by implementing a 'geomobile configuration' with a 90 degree change to the satellite flight orientation and a large deployable reflector (12 metres in diameter).
In addition to the Inmarsat payload, Alphasat will also carry three ESA-provided Technology Demonstration Payloads (TDPs): an advanced star tracker using active pixel technology, an optical laser terminal for geostationary to low-Earth orbit communication at high data rates, and a dedicated payload for the characterisation of transmission performance in the Q-V band in preparation for possible commercial exploitation of these frequencies. A fourth TDP for space environments and effects monitoring is also under discussion.
Dominique Detain | alfa
Gecko adhesion technology moves closer to industrial uses
13.12.2017 | Georgia Institute of Technology
New silicon structure opens the gate to quantum computers
12.12.2017 | Princeton University
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
14.12.2017 | Health and Medicine
14.12.2017 | Physics and Astronomy
14.12.2017 | Life Sciences