The outline of a sensor network
  1.Early detection of a disaster
2.Collection of the information at the time of a disaster
3.Environmental monitoring etc. (At the time of usual)
  Supply of a communication line or electric power acquires required
  information from a difficult place.
  A low power consumption small earth station is used by a small light
  weight, and it is prolonged operation at power supplies, such as a
  Early detection and correspondence of the disaster based on the
  information collected in the base station .

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