RADIATION ENVIRONMENTS

Sources of radiation include galactic cosmic rays, solar energy particles, and the Earth’s radiation belt

DEEP SPACE

deep space up to 300,000 particles/cm²/h, mainly protons with some α particles and heavier ions

GEOSYNCHRONOUS ORBIT 

up to 500,000 particles/cm²/h, mainly electrons and protons

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LOW EARTH ORBIT

up to 100,000 particles/cm²/h, mainly protons and electrons

AIRPLANE ALTITUDE
6000 – 9000 neutrons/cm²/h

GROUND LEVEL 
10 – 15 neutrons/cm²/h, ~ 60 muons/cm²/h