美国将发射第八颗地球资源卫星
文章来源:未知 文章作者:enread 发布时间:2012-12-26 05:49 字体: [ ]  进入论坛
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An oversized semi-trailer truck carrying NASA's Landsat Data Continuity Mission (LDCM) has arrived at its launch site at Vandenberg Air Force Base in California in preparation for launch. This NASA and U.S. Geological Survey mission will continue a 40-year record of measuring change on the planet from space. LDCM is the eighth satellite in the Landsat series, which began in 1972. It will extend and expand global land observations that are critical in many sectors1, including energy and water management, forest monitoring, human and environmental health, urban planning, disaster recovery and agriculture.
 
Following final tests, the LDCM satellite will be attached to an Atlas2 V rocket and launched into space February 11, 2013. Built and tested by Orbital Science Corp., LDCM left their Gilbert, Ariz. facility on Dec. 17.
 
"LDCM builds on and strengthens a key American resource: a decades-long, unbroken Landsat-gathered record of our planet's natural resources, particularly its food, water and forests," said Jim Irons, Landsat project scientist at NASA's Goddard Space Flight Center in Greenbelt, Md.
 
LDCM carries two instruments, the Operational Land Imager (OLI) built by Ball Aerospace4 & Technologies Corp. in Boulder5, Colo., and the Thermal6 Infrared7 Sensor8 (TIRS) built by NASA Goddard "Both of these instruments have evolutionary9 advances that make them the most advanced Landsat instruments to date and are designed to improve performance and reliability10 to improve observations of the global land surface," said Ken3 Schwer, LDCM project manager at NASA Goddard.
 
OLI will continue observations in the visible, near infrared, and shortwave infrared portions of the electromagnetic spectrum11 and includes two new spectral12(频谱的) bands, one of which is designed to support monitoring of coastal13 waters and the other to detect previously14 hard to see cirrus clouds that can otherwise unknowingly impact the signal from the Earth surface in the other spectral bands. TIRS will collect data in two thermal bands and will thus be able to measure the temperature of the Earth's surface, a measurement that's vital to monitoring water consumption, especially in the arid15(干旱的) western United States.
 
NASA and the U.S. Department of the Interior through the U.S. Geological Survey (USGS) jointly16 manage the Landsat program. After launch and the initial check out phase, USGS will take operational control of the satellite, will collect, archive, and distribute the data from OLI and TIRS, and will rename the satellite as Landsat 8. The LDCM data will be freely and openly available through the USGS data system.
 
NASA's Launch Services Program at Kennedy is responsible for launch management. United Launch Alliance is the provider of the Atlas V launch service.


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1 sectors 218ffb34fa5fb6bc1691e90cd45ad627     
n.部门( sector的名词复数 );领域;防御地区;扇形
参考例句:
  • Berlin was divided into four sectors after the war. 战后柏林分成了4 个区。 来自《简明英汉词典》
  • Industry and agriculture are the two important sectors of the national economy. 工业和农业是国民经济的两个重要部门。 来自《现代汉英综合大词典》
2 atlas vOCy5     
n.地图册,图表集
参考例句:
  • He reached down the atlas from the top shelf.他从书架顶层取下地图集。
  • The atlas contains forty maps,including three of Great Britain.这本地图集有40幅地图,其中包括3幅英国地图。
3 ken k3WxV     
n.视野,知识领域
参考例句:
  • Such things are beyond my ken.我可不懂这些事。
  • Abstract words are beyond the ken of children.抽象的言辞超出小孩所理解的范围.
4 aerospace CK2yf     
adj.航空的,宇宙航行的
参考例句:
  • The world's entire aerospace industry is feeling the chill winds of recession.全世界的航空航天工业都感受到了经济衰退的寒意。
  • Edward Murphy was an aerospace engineer for the US Army.爱德华·墨菲是一名美军的航宇工程师。
5 boulder BNbzS     
n.巨砾;卵石,圆石
参考例句:
  • We all heaved together and removed the boulder.大家一齐用劲,把大石头搬开了。
  • He stepped clear of the boulder.他从大石头后面走了出来。
6 thermal 8Guyc     
adj.热的,由热造成的;保暖的
参考例句:
  • They will build another thermal power station.他们要另外建一座热能发电站。
  • Volcanic activity has created thermal springs and boiling mud pools.火山活动产生了温泉和沸腾的泥浆池。
7 infrared dx0yp     
adj./n.红外线(的)
参考例句:
  • Infrared is widely used in industry and medical science.红外线广泛应用于工业和医学科学。
  • Infrared radiation has wavelengths longer than those of visible light.红外辐射的波长比可见光的波长长。
8 sensor sz7we     
n.传感器,探测设备,感觉器(官)
参考例句:
  • The temperature sensor is enclosed in a protective well.温度传感器密封在保护套管中。
  • He plugged the sensor into a outlet.他把传感器插进电源插座。
9 evolutionary Ctqz7m     
adj.进化的;演化的,演变的;[生]进化论的
参考例句:
  • Life has its own evolutionary process.生命有其自身的进化过程。
  • These are fascinating questions to be resolved by the evolutionary studies of plants.这些十分吸引人的问题将在研究植物进化过程中得以解决。
10 reliability QVexf     
n.可靠性,确实性
参考例句:
  • We mustn't presume too much upon the reliability of such sources.我们不应过分指望这类消息来源的可靠性。
  • I can assure you of the reliability of the information.我向你保证这消息可靠。
11 spectrum Trhy6     
n.谱,光谱,频谱;范围,幅度,系列
参考例句:
  • This is a kind of atomic spectrum.这是一种原子光谱。
  • We have known much of the constitution of the solar spectrum.关于太阳光谱的构成,我们已了解不少。
12 spectral fvbwg     
adj.幽灵的,鬼魂的
参考例句:
  • At times he seems rather ordinary.At other times ethereal,perhaps even spectral.有时他好像很正常,有时又难以捉摸,甚至像个幽灵。
  • She is compelling,spectral fascinating,an unforgettably unique performer.她极具吸引力,清幽如鬼魅,令人着迷,令人难忘,是个独具特色的演员。
13 coastal WWiyh     
adj.海岸的,沿海的,沿岸的
参考例句:
  • The ocean waves are slowly eating away the coastal rocks.大海的波浪慢慢地侵蚀着岸边的岩石。
  • This country will fortify the coastal areas.该国将加强沿海地区的防御。
14 previously bkzzzC     
adv.以前,先前(地)
参考例句:
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
15 arid JejyB     
adj.干旱的;(土地)贫瘠的
参考例句:
  • These trees will shield off arid winds and protect the fields.这些树能挡住旱风,保护农田。
  • There are serious problems of land degradation in some arid zones.在一些干旱地带存在严重的土地退化问题。
16 jointly jp9zvS     
ad.联合地,共同地
参考例句:
  • Tenants are jointly and severally liable for payment of the rent. 租金由承租人共同且分别承担。
  • She owns the house jointly with her husband. 她和丈夫共同拥有这所房子。
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