Articles and Interviews

11 January 2013

Alphabus/Alphasat

ARTES 8 Alphabus/Alphasat is dedicated to the development and deployment of the Alphasat satellite. Alphasat is being built in partnership between ESA and European operator Inmarsat by Astrium. It is the first satellite to use Alphabus, the new European high-power telecommunications platform jointly developed by Astrium and Thales Alenia Space under a joint contract from ESA and the French space agency, CNES.

Alphabus is the coordinated European response to the increased market demand for larger telecommunication payloads. It is now available on the commercial market to accommodate missions with up to 18 kW of payload power. The new developments within the Alphabus Extension programme will extend the range up to 22 kW.

Alphasat carries a new generation of advanced geomobile communications payload in L-band that will augment Inmarsat’s Broadband Global Area Network (BGAN) service, enabling communications across Europe, Asia, Africa and the Middle East with increased capacity. Weighing more than 6,000kg, Alphasat is planned for launch in 2013 on Ariane 5.

Alphasat also carries four technology demonstration payloads developed through ESA’s Advanced Research in Telecommunications Systems (ARTES) programme.

Laser communication and Ka-band downlink

 

The advanced laser terminal provides optical communications at 2.8 Gbit/s from Earth observation satellites in low-Earth orbit to a geostationary orbit. A Ka-band transmitter sends the data to a ground station.

Q/V-band communication and propagation

A repeater explores the use of these frequencies for future applications. In parallel, experiments with the propagation beacon measure the effects of Earth’s atmosphere on radio waves in the band.

Startracker

A sensor with active pixel detector is included to gain early flight experience on this new product, capable of very accurate and autonomous attitude acquisition. The sensor is highly resistant to the radiation environment in geostationary orbit.

Environmental testing and radiation sensor

The environment effects facility tests electronic components and solid-state materials in the radiation environment of geostationary orbit. A particle spectrometer measures these radiation levels in parallel.






 
 

 
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Reducing Total Freshwater Use in the Gold Processing Industry Using Linear Programming

Suliman Emdini Gliwan*1 Kevin Crowe *2 *1Ph.D.Candidate, Faculty of Natural Resource Management, Lakehead University, 955 Oliver Rd, Thunder Bay, ON, Canada (P7B5E1). *2Associate Professor, Faculty of Natural Resource Managemen...
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Control of a Hybrid Wind-PV and Energy Storage System

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Modeling Ripeness Grading of Palm Oil Fresh Fruit Bunches through Image Processing using Artificial Neural Network

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DETECTIONS OF BUILDINGSDIGITAL SURFACE MODELS DEFORMATIONS GENERATED FROM DRONES NADIR IMAGES

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Comparative responses to cadmium toxicity of Arabidopsis thaliana mutant seedling (cad2) and wild type (col0)

Comparative responses to cadmium toxicity of Arabidopsis thaliana mutant seedling (cad2) and wild type (col0) CHAFFEI HAOUARI CHIRAZ1, SLATNI TARAK2, DJEMAL FATMA1, GOUIA HOUDA1 (Company / Faculté des Sciences de Tunis) 1Unive...
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Precision Technologies Role in the Study of Climate Change Impact

The Second session of the International Symposium Precision Technologies Role in the Study of Climate Change Impact and its implications on the Economic and Natural Structure: The reality and suggested solutions Istanbul, Turke...
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5th International Conference on Water, Energy, Food and Agricultural Technology Istanbul, Turkey, 22-25 January 2019

5th International Conference on Water, Energy, Food and Agricultural Technology Istanbul, Turkey, 22-25 January 2019   Scientific themes 1-      water resources and desertification and agricultural techniques 2-   ...
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Drone base multiscale Digital Surface Models to planar areas.

Drone base multiscale Digital Surface Models to planar areas. Dr. Jean A. Doumit   Abstract The obtaining of a Digital Surface models (DSMs) at different scales and levels before the appearance of Unmanned Aerial Vehicles (UAV...
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Monitoring of Mosul Reservoir Using Remote Sensing TechniquesFor the Period After ISIS Attack in 9 June 2014

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TOOLS FOR A NEW URBAN AGENDA

  Tullia Valeria Di Giacomo (*); F. Paolo Di Giacomo (**) (*)Alpha Consult, Rome; (**) SOGEIT, Tunis   Keywords: GIS, WEBGIS, Urban Agenda, sustainable development Summary: Urban Authorities, civil society, businesses and kno...
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The Geographic Information Systems and Geospace Data for sustainable development                              Under the slogan                                    Role of GIS appl...
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Information Technology Infrastructure Library

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