In an unprecedented space collision, a commercial Iridium communications satellite and a defunct Russian satellite ran into each other Tuesday above northern Siberia, creating a cloud of wreckage, officials said today. The international space station does not appear to be threatened by the debris, they said, but it’s not yet clear whether it poses a risk to any other military or civilian satellites.

“They collided at an altitude of 790 kilometers (491 miles) over northern Siberia Tuesday about noon Washington time,” said Nicholas Johnson, NASA’s chief scientist for orbital debris at the Johnson Space Center in Houston. “The U.S. space surveillance network detected a large number of debris from both objects.”

More details on CBS site

Found two interesting posts about how Twitter becomes a real-time news media and how it contributes to spread news all over the World despite telecommunication networks breakdown and/or government censorship.

Smart Mobs author Mark A.M Kramer asks if Information and Communication Technologies (ICT) could make humanity morally accountable ? Today, even with a very limited presence of the International community (politics, journalists as well as Aid workers) we continue to receive near real-time information from Myanmar through various multi-plateforms communication media such Twitter, SMS, RSS etc.

Ten days later, in China, an powerful earthquake shook the Sichuan province, information that Technology blogger Robert Scoble claimed that Twitter had the breaking news even before the United States Geological Survey, which provides early warnings of seismic events.

Is Twitter's slogan "What are you doing" should be now replaced by "What's going on" ?

Sources: SmartMobs, BBC

TGV tests Wi-Fi + satellite link in three TGV trains on its Eastern network. If the experiment proves successful the new service should be generalized, from 2009, to all 52 oars network East.

With combines effort of satellite link and wireless network, in locations, such tunnels and train stations, where the satellite link cannot be established, the wi-fi network takes over to maintain the access to the Web without interruption.

French railways company SNCF previously conducted unsuccessful test using GPRS data network before launching a 2 years research and preparation program to implement this dual solution. Among technical difficulties to overcome are these related to 320 km/h TGV trains speed which causes instability and vibrations. 

The project is done in a partnership with Orange(France Telecom mobile operator), Capgemini, Alstom Transport and Eutelsat.

SNCF will put on board of its TGV a dedicated Web portal providing information about destinations, weather forecast, News, traffic information as well as a real time tracking service. From a technical point of view, TGV trains are fitted with a server where all portal content is loaded prior the journey in order to minimize bandwidth consumption due to its high cost. The tested system has been designed to provide simultaneous web connection for 14 per cent (50 users) of the total capacity of each TGV train (350).

The business plan is not defined yet, but the widespread of the system on TGV Eastern Europe network would represent an investment of 120 millions USD over 4 years. First price estimation given by SNCF Passenger service would be a flat 4-5 USD to access the Web portal during the whole journey and a 4-5 USD per hour to access the Internet.

A very interesting project and definitively a real challenge to maintain permanent web connectivity during a train journey at more than 300 km/h where the 16'000 volt power line running over the train may also create some electro-magnetic interferences and without mentioning all micro interruptions of the satellite link each time the train pass under a bridge or when dense foliage is found within the satellite's line of sight.

Any reader who already had the chance to test the reliability of the service ?

More infos (in French): Journal du Net, CNet France.