Search on: IONOSPHERE 
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Descriptor English:   Ionosphere 
Descriptor Spanish:   Ionosfera 
Descriptor Portuguese:   Ionosfera 
Tree Number:   SP8.473.654.587.447.371.367
Definition English:   The zone of the atmosphere, from about 70 km to 500 km, in which charged particles, ions and electrons are formed by photo-ionization under the effect of the sun's radiation. (Material V - Gunn, S.W.A. Multilingual Dictionary of Disaster Medicine and International Relief, 1990) 
Record Number:   35060 
Unique Identifier:   DDCS035060 

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