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90-day mission altitude of orbit ARRAY B.F.O. Skin Lens calculate the dose CALLING PROGRAM coefficient computer code computer subroutines constraints CONTINUE IUNI critical body organs Cucinotta days in mission degree of inclination DELX DIMENSION dose in rads dose to critical Earth orbit LEO exposure limit reached exposure rates extravehicular activity FRACTION OF EXPOSURE function of altitude geometry by spherical GO TO 30 GO TO 65 inclined orbits 1.00 INDEPENDENT VARIABLE IPT GT km B.F.O. Skin Langley Research Center LIMIT FOR 90-DAY low Earth orbit main program maximum NASA NMAX NT=1,NTAB IUNI Old Dominion University Performing Organization present calculations Proton RADIATION DOSES radiation exposure radiations in low REFERENCE RISK rems RETURN END RETURN IUNI SAMPLE CALCULATIONS SHELL MODEL shield thickness SHIELDOSE shown in table Skin Lens Testes Space suit SUBROUTINE IUNI subroutines calculate SUBROUTINES FOR ESTIMATION subroutines to calculate thickness of spacecraft trapped radiations values VARIABLE TABLE ZERO ORDER INTERPOLATION