Life Support Systems in Space
by
Gp Capt N Rattan VSM
DPMO (S)
HQ WAC, IAF

Sqn Ldr Anirudh Agrawal
Gd Spl (Av Med)
3 Sqn AF

ABSTRACT
Life support during space travel and exploration has progressed from being a basic survival aid to a more comprehensive system to cater for enhanced crew comfort and mobility. Life support systems in the Mercury Spacecraft had a 5.0 psi oxygen atmosphere with the system having a carbon dioxide absorber. The crew remained in the pressure suit for the complete duration of the flight. Modern spacecraft life support systems are designed to work at sea level pressures (14.7+ 0.2 psi) and provide a 20% oxygen and 80% nitrogen, humidity controlled, environment. They also have water reco