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。
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。
SSNDR will consist of several earth observation satellites operating in different orbits and ground application system, obtaining information of earth environment and natural disaster.
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