美国国家航空航天局NASA每日一图-2017年6月27日

As the Sun Rises, NASA's Global Hawk is Being Prepared for Flight

Hot summer days in Southern California’s Antelope Valley force many aircraft operations to start early in the morning before the sun rises. On a back ramp at Armstrong Flight Research Center on Edwards Air Force Base, a NASA Global Hawk goes through testing of its communication components and satellite connection links for the International Maritime Satellite Terminal, or Inmarsat, in preparation for flight.
With temperatures reaching over 100 degrees, the Global Hawk team arrives at the center by 4 a.m. while electronic components, which are cooled by fuel onboard, can function within temperature limitations. Testing usually ceases by 1 p.m. PDT as fuel and onboard computers become too hot to operate.

Inmarsat is a commercial global satellite network that offers mobile satellite communication solutions for maritime, land and aeronautical users. The agency’s Global Hawk uses Inmarsat as one of its command and control links from the ground control station to the aircraft.

The Global Hawk unmanned aircraft is used for high-altitude, long-duration Earth science missions. The ability of the Global Hawk to autonomously fly long distances, remain aloft for extended periods of time and carry large payloads brings a new capability to the science community for measuring, monitoring and observing remote locations of Earth not feasible or practical with piloted aircraft, most other robotic or remotely operated aircraft, or space satellites.

Image Credit: NASA/Michael Bereda

Last Updated: June 29, 2017
Editor: Monroe Conner

随着太阳升起,NASA的全球鹰正在准备飞行

南加利福尼亚州羚羊谷炎热的夏天,许多飞机的行动早在太阳升起的早晨就开始。在爱德华兹空军基地的阿姆斯壮航空研究中心的后坡道上,美国宇航局全球鹰队通过对国际海事卫星终端或国际海事卫星终端卫星通信部分和卫星连接的测试进行测试,以准备飞行。

全球鹰队的气温达到100度以上,凌晨4点抵达中心,电子部件由机上燃料冷却,可在温度范围内发挥作用。测试通常在下午1点之前停止作为燃料和车载电脑的PDT变得太热,不能操作。

国际海事卫星组织是一个商业全球卫星网络,为海运,陆地和航空用户提供移动卫星通信解决方案。该机构的全球鹰使用Inmarsat作为其从地面控制站到飞机的指挥和控制链接之一。

全球鹰无人机用于高空,长时间的地球科学任务。全球鹰自主长距离飞行的能力,长时间保持高空,携带大量有效载荷为科学界带来了新的能力,用于测量,监测和观测地球偏远地区不可行或实际的驾驶飞机,最多其他机器人或远程操作的飞机或太空卫星。

图片来源:NASA / Michael Bereda

最后更新:2017年6月29日
编者:门罗·康纳(Monroe Conner)

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