由于卫星高度较低，碎片几乎直接进入大气层。
Because of the satellite's relatively low altitude, debris began re-entering the atmosphere almost straight away, the us defence department said.
介绍了卫星高度计定标中海面高度和后向散射系数的定标方法。
The paper briefly introduces absolute calibration methods of sea surface height and backscatter of satellite altimeter.
利用单层电离层改正模型就GPS卫星高度角对测距的影响作了探讨。
The single ionospheric layer correction model is used to delete the effects (l) on GPSranging, and the average ionospheric height is generally used in the calculation.
将GPS卫星高度和方位角预报值与实际跟踪值比较，进行了精度分析。
To compare the elevation and azimuth predictions of GPS satellite with actual tracking data, the error analysis has been made.
进一步分析了雷达辐射源位置、星座几何形状和星座的卫星高度对几何精度衰减因子的影响。
Then, the effects of radar beacon position, cluster geometry and satellite altitude on the geometry dilution of precision factor are analyzed.
本文还就经验正交展开和奇异值分解方法在卫星高度计海面风、浪资料分析中的应用作了初步探时。
In this paper, also the primary applications of EOF and SVD in analyzing satellite altimeter data of sea surface wind and wave is studied.
根据所得潮汐调和常数对卫星高度计测得的海面高度进行潮汐订正，进而得到南海各季节的海面高度距平。
The sea surface height anomaly (SSHA), which is obtained after tidal correction based on the tidal results of this paper, is predominated by seasonal alternating monsoons.
结果是被调整到盘旋在适当高度的飞艇，经常被用来作为接受和发送卫星信号的中转站。
As a result blimps, adjusted to hover at appropriate heights, are often used to relay data to and from satellites.
科学家在综合美国国家航空航天局（NASA）卫星图像和激光（扫描）数据的基础上，绘制出了世界上第一幅展示森林林木高度的地图。
Using a combination of NASA satellite images and laser data, scientists have produced a first-of-its kind map that details the height of the world’s forests.
在卫星的高度上，洪水可以从空间上观测到，在印度河的某些部分，其宽度扩展到20多公里。
At its height, the floodwaters could be seen from space, with the Indus spreading more than 20 miles wide at some parts.
不过从1993年开始，卫星一直在测量着冰川的高度。到了2003年，冰川的具体质量也纳入测量范围。
But since about 1993, satellites have been measuring the height of the ice and, since 2003, ice mass.
这个监测卫星2009年的时候在31英里的高度拍下了令人震惊的月球表面照片。
The LRO produced stunning photographs of the lunar surface in 2009 from an altitude of 31 miles.
在这个方案中，一个载物飞行器(比如说搭载着卫星)将(首先)搭载超燃冲压发动机进入相当高度，理论上能够达到近似轨道速度。
In such a scheme, a payload vehicle (holding, say, a satellite) would piggyback to high altitude aboard the scramjet, which in theory could reach near-orbital speeds.
2003年发射的冰云和地面高度卫星对北极圈区域进行的测量给这项研究提供了参照。
The study looked at measurements taken of the Arctic region by the Icesat satellite, launched in 2003.
和这个计划不同，更多研究者的努力方向是使用轨道高度22300英里的地球同步卫星，它们和地球的位置相对固定，可以不间断地传送能源。
Moststudies have focused instead on geostationary satellites, those whoseorbit 22, 300 miles above the Earth keeps them over a single location, to which they would transmit a continuous flow of power.
作为替代的冰云和地面高度卫星二号(Icesat2)直到2014年才计划发射升空。
Icesat2, the satellite's replacement, is not planned for launch until 2014.
卫星用雷达测定卫星从冰层顶部算起的高度。
The satellite USES radar to measure its altitude above the ice sheet.
在400公里高的轨道上，不推进的话，卫星的轨道寿命通常是几个月，200公里高度的轨道寿命是几周。
At 400 kilometers, orbital lifetimes are usually measured in a few months without re-boost. At 200 kilometers this drops to a few weeks.
随后，作者们结合适合大熊猫生活的森林标准，包括海拔高度、边坡坡度以及竹子的分布情况，分析了根据这些卫星数据得出的结果。
The authors then combined results based on these satellite data with criteria that make forests suitable for pandas, including elevation, slope incline and presence of bamboo.
因为该卫星的海拔高度已知，于是就能够确定海平面以上的冰层厚度，从而可以计算出冰层的总厚度。
Because the satellite's altitude above sea level is known, the thickness of the ice above sea level can then be determined, allowing the overall thickness of the ice to be calculated.
他们希望GIOVE - B卫星可以在GIOVE - A卫星的基础上，完善并且提供更多的数据。GIOVE - A卫星是欧洲第一颗在中地球轨道高度运行的卫星。
It is hoped that GIOVE-B will provide data to complement and expand upon results from GIOVE-A, which was the first European satellite to operate in MEO.
其中的一颗卫星，美国宇航局的icesat就携带着一个激光高度探测仪来探测冰面的高度。
One such satellite, NASA's ICESat, carries a laser altimeter to measure the height of the ice surface.
卫星数据显示，地震确实给珠峰的高度造成了一定影响。
Satellite data has indicated the quake impact reduced the height of the peak.
我们把卫星送入不同高度的轨道饶地球运行，就能测出地球上空不同高度处空气的含量。
By sending satellites round the earth at different heights, we can find out how much air there is at each height.
这对卫星将在全球范围内一起测量地表高度变化，其精确度低于2米。
Together, the pair will measure the variation in height across the globe to an accuracy of better than two metres.
它从高度300km的火星人造卫星上绘制出火星表面的图像，它曾经还绘制出这个星球表面的3d图片。
It is mapping the surface of Mars from an altitude of 300km from the safety of the Mars Orbiter - and has even taken 3d pictures of the surface of the planet.
尽管，许多卫星在36000千米处形成一个类似土星光环的环，但这个高度的卫星都需要花费24小时绕地球一圈。因此，它们一直在地球上空的同一点盘旋。
Many, though, form a ring like Saturn's at a distance of 36,000km, the place at which an object takes 24 hours to orbit the Earth and thus hovers continuously over the same point of the planet.
尽管，许多卫星在36000千米处形成一个类似土星光环的环，但这个高度的卫星都需要花费24小时绕地球一圈。因此，它们一直在地球上空的同一点盘旋。
Many, though, form a ring like Saturn's at a distance of 36,000km, the place at which an object takes 24 hours to orbit the Earth and thus hovers continuously over the same point of the planet.
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