lockheed martin space systems
Metamaterials approach makes better satellite antennas
Cheaper, lighter and more energy-efficient broadband devices on communications satellites may be possible using metamaterials to modify horn antennas, according to engineers from Penn State and Lockheed Martin Corp.
“Existing horn antennas have …
NASA’s Stardust Comet-Chaser Passes Asteroid Test
All systems on NASA’s Stardust spacecraft performed successfully when tested in a flyby of asteroid Annefrank on Friday, heightening anticipation for Stardust’s encounter with its primary target, comet Wild 2, 14 months from now. As a bonus, Stardust discovered that Annefrank is about twice the size anticipated, but with a dimmer surface. The dimmer surface increased the challenge of sighting the object as the spacecraft approached.