WORKING TOGETHER TO ADVANCE SPACE DEVELOPMENT

Radiation Levels:
   0.41 mSv/day - ISS
   0.05 mSv/day - ELEO
   1.91 mSv/day - Free space
   0.95 mSv/day - Lunar surface
   0.67 mSv/day - Martian surface
   0.95 mSv/day - Free space under 20 cm thick of food/waste.
   0.95 mSv/day - Surface under 11 cm of packed regolith

Assume: 1,000 mSv career limit for a 47 year old male.

Therefore: Time to reach career limits:
      2,439 days =   6.7 years - ISS
    20,000 days =    55 years - ELEO
         523 days = 1.43 years - Free space
      1,052 days =   2.9 years - Lunar surface
      2,228 days =   6.1 years - Martian surface
      1,052 days =   2.9 years - Free space under 20 cm thick of food/waste.
      1,052 days =   2.9 years - Surface under 11 cm of packed regolith

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