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The Lockheed Martin/Boeing F-22 Raptor is an American twin-engine, all-weather, supersonic stealth fighter aircraft.As a product of the United States Air Force's Advanced Tactical Fighter (ATF) program, the aircraft was designed as an air superiority fighter, but also incorporates ground attack, electronic warfare, and signals intelligence capabilities.
Space patch collecting is done by a modest group of people worldwide, trying to keep up with new releases while searching for vintage examples of early mission patches, some now nearly 60 years old. Since 1971, all official NASA mission patches have been produced by a single supplier: A-B Emblem of Weaverville, North Carolina. As a result, most ...
The Air Force also selected the Pratt & Whitney F119 engine to power the F-22 production version. The Lockheed and Pratt & Whitney designs were rated higher on technical aspects, considered lower risk (the YF-23 flew considerably fewer sorties and hours than its counterpart), and were considered to have more effective program management.
NASA planners stated that developing technologies for the X-44 could have application to the F-22 and Joint Strike Fighter programs and commercial supersonic ventures. [2] Initial feasibility work was funded by government and two contractors. [2] NASA approved the program to start in June 1999, giving the aircraft the designation "X-44A". [3]
The AN/APG-77 system itself exhibits a very low radar cross-section, supporting the F-22's stealthy design. [3] The upgraded APG-77(V)1 may have an even greater range. Much of the technology developed for the APG-77 was used in the AN/APG-81 radar for the F-35 Lightning II , and in turn the technology from the APG-81 was applied to the upgraded ...
Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."
Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."
Therefore, the NASA pictures are legally in the public domain. Photographs and other NASA images should include the NASA image number if you have it, for easy reference. When accessing space photographs, be sure that you know the source. Pictures not produced by NASA employees may have different usage restrictions.