Israel’s Technion is developing 3 unique “nano-satellites”, each less than 6kg. They will be launched in 2015 and remain in close formation. Professor Pini Gurfil said the experiment will boost the miniaturisation of electronic components, efficient processing and movement in space and advance a variety of other civilian applications. The Technion launched an 84kg satellite in 1998 that worked for 21 years.
http://www.jpost.com/Sci-Tech/Article.aspx?id=255026