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Shuttle engine tested
One of the three liquid-fueled main engines that will power Discovery into orbit during the space shuttle return-to-flight mission is test-fired at Stennis Space Center. (2min 57sec file)
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Delta 4-Heavy preview
Preview what a Boeing Delta 4 rocket launch will be like with this animation package of a "Heavy" configuration vehicle. (1min 41sec file)
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Rover's stuck RAT
A problem with the Opportunity rover's Rock Abrasion Tool is explained in detailed by JPL mission manager Chris Salvo. (4min 14sec file)
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New water clues
Spirit's examination of rock outcropping at Gusev Crater has yielded new clues about the history of water there, as explained by Doug Ming, a rover science team member from Johnson Space Center. (5min 59sec file)
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Spirit on a hill
A stunning new picture from the Mars rover Spirit taken from the hillside shows the sweeping plains of Gusev and the crater's rim on the distant horizon. Expert narration is provided by Steve Squyres, the rover lead scientist. (1min 22sec file)
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Update on Opportunity
Steve Squyres, the rover lead scientist, descibes Opportunity's ongoing work inside Endurance Crater and narrates new pictures that includes clouds moving across the Martian sky. (5min 50sec file)
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Latest Mars briefing
Scientists and mission officials explain the latest findings and exploration by the Spirit and Opportunity rovers during this news conference on August 18. (49min 40sec file)
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Ship docks to station
The Russian Progress 15P resupply ship makes a fully automated rendezvous and docking with the International Space Station. An external camera on the craft provides this view of the final approach to the aft port of the Zvezda service module. (3min 49sec file)
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Air-to-space laser communications to be tested
NORTHRUP GRUMMAN NEWS RELEASE
Posted: August 21, 2004

Northrop Grumman Corporation has been selected by the U.S. Air Force to design, build and demonstrate a prototype optical aperture system that will enable laser communications between aircraft and space-based platforms.

The Airborne Lasercom Terminal - Optical Aperture technology demonstration will mature technology prior to a separately awarded terminal-development effort. The future laser communications terminal will provide more intelligence, surveillance and reconnaissance data to the user at much higher speeds than currently achievable with radio-frequency systems.

"Northrop Grumman's design approach will provide greater communication capability between existing military platforms and space assets," said Taylor W. Lawrence, vice president and general manager of the company's Systems Development and Technology Division. "In addition to increasing the amount of bandwidth over current radio-frequency systems, this technology has the potential to reduce size, weight and power requirements and do so at a lower cost.

"As the industry continues to move toward more interoperability and network-centric systems, laser applications provide a key technology for airborne reconnaissance missions using a layered architecture involving satellites, manned and unmanned aircraft, aerostatic vehicles, and portable/fixed ground terminals," Lawrence added. "This aperture system is a critical link between airborne lasercom terminal requirements and a number of truly transformational communications system architectures."

Northrop Grumman is one of four prime contractors chosen to mature and demonstrate aperture technologies and will lead the systems engineering and integration effort for their team.

Other teammates include OPTRA Inc., of Topsfield, Mass., which will provide the coarse-beam steering subsystem, and AOptix Technologies Inc., of Campbell, Calif., which will provide the fine-beam steering subsystem.

Northrop Grumman's Electronic Systems sector will serve as the prime contractor. The sector is headquartered in Baltimore and is a world leader in the design, development, and manufacture of defense and commercial electronics systems, including airborne radar systems, navigation systems, electronic warfare systems, precision weapons, airspace management systems, air defense systems, communications systems, space systems, marine systems, oceanic and naval systems, government systems, and logistic services.