November 30, 2001 marked the first-ever transmission of an image by laser link from one satellite to another. Terminals on the European Space Agency's (ESA) Artemis spacecraft, operating 19,270 miles above Earth, and the French space agency's (CNES) SPOT 4 satellite, orbiting at 517 miles altitude, exchanged high-definition imagery data at 50 megabits per second. Images from SPOT 4 via Artemis were subsequently transmitted to the SPOT Image control center in Toulouse, France. Effective cooperation between several operations control centers ensured success. These included the CNES SPOT 4 control center and the SPOT Image data reception/processing facility in Toulouse, the ESA-Artemis mission control facility in Redu, Belgium, and the Artemis operations control center in Fucino, Italy. The main advantage offered by the optical data relay system is enhanced availability. When operated with SPOT 4, the link can be maintained for more than 50% of the orbit. This increases contact time dramatically and shortens the time interval between when images are recorded and when they are available to the customer. System potential also extends beyond Earth observation, promising to revolutionize satellite-to-satellite communications for constellations in low-earth orbit, geo-stationary satellites, and deep-space exploration probes. Contact Bernard Cabrieres at CNES for more information. Tel: +33 5 61 27 42 47, or email@example.com.
Samsung's Galaxy line of smartphones used to fare quite well in the repairability department, but last year's flagship S5 model took a tumble, scoring a meh-inducing 5/10. Will the newly redesigned S6 lead us back into star-studded territory, or will we sink further into the depths of a repairability black hole?
In 2003, the world contained just over 500 million Internet-connected devices. By 2010, this figure had risen to 12.5 billion connected objects, almost six devices per individual with access to the Internet. Now, as we move into 2015, the number of connected 'things' is expected to reach 25 billion, ultimately edging toward 50 billion by the end of the decade.
NASA engineer Brian Trease studied abroad in Japan as a high school student and used to fold fast-food wrappers into cranes using origami techniques he learned in library books. Inspired by this, he began to imagine that origami could be applied to building spacecraft components, particularly solar panels that could one day send solar power from space to be used on earth.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.