对地观测卫星。
The NigeriaSat-X is one of two Earth observation satellites that the country recently launched.
这颗尼日利亚卫星-X是该国最近发射的两颗地球观测卫星中的一颗。
NigeriaSat-2Nigeria has successfully launched two Earth observation satellites which could be used to monitor weather in a region seasonally ravaged by disasters.
尼日利亚已成功发射了两颗地球观测卫星，它可以用来监测在一个受季节性自然灾害地区的天气。
Global coverage and sun synchronization are the essential properties of the earth observation satellites, which are assumed by designing the orbit period and inclination.
对地观测卫星轨道具有全球目标覆盖和太阳同步两种特性，通过设计轨道周期和轨道倾角可以获得这些特性。
Space reconnaissance and mapping are essential elements of strategic missions. Space reconnaissance camera and mapping camera are payloads of earth observation satellites.
航天侦察和测绘是战略武装必不可少的组成部分，航天侦察和测绘相机是对地观测卫星的有效载荷。
SSNDR will consist of several earth observation satellites operating in different orbits and ground application system, obtaining information of earth environment and natural disaster.
这个系统由多颗不同轨道、不同种类的地球观测卫星和地面应用系统组成，以获取地球环境和灾害信息。
Such satellites—maintaining their steady sweeps as the earth revolves beneath them—cover all parts of the globe and hence are ideal for weather observation, communications and other tasks.
这些卫星处在平稳旋转的地球上空，几乎可以对全球的所有地区进行稳定的扫描，因此能很好地完成气象观察、通讯以及其它任务。
The problem is exacerbated by the lack of an adequate replacement for a pair of Earth-observation satellites, the Orbiting Carbon Observatory and Glory, which failed on launch in the past two years.
在过去两年Glory观测卫星失败发射，所以无法提供备用的地球观测卫星，这进一步加重了该问题。
The problem is exacerbated by the lack of an adequate replacement for a pair of Earth-observation satellites, the Orbiting Carbon Observatory and Glory, which failed on launch in the past two years.
在过去两年Glory观测卫星失败发射，所以无法提供备用的地球观测卫星，这进一步加重了该问题。
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