DELTA-SIERRA MARS TOOL
Mars habitat gas calculator
Use the ideal-gas equation without confusing total pressure and partial pressure.
Essential answer
At fixed volume and temperature, higher pressure means more gas. Oxygen partial pressure is the O₂ fraction multiplied by total pressure.
Every value is editable. Scenario values are not an official NASA architecture.
Calculator
Method and limitations
The model assumes ideal-gas behavior and a homogeneous mixture. Pressure and oxygen fraction are architecture choices; the calculator does not prescribe a human atmosphere.
Primary sources and evidence status
The calculation distinguishes physical relation, demonstrated value, standard, educational assumption, and Delta-Sierra scenario.
- NASA Glenn — Equation of State
Primary educational source for the ideal-gas relation P·V=n·R·T and the requirement to use absolute temperature. - NASA-STD-3001 Volume 2
Human-spaceflight standard context; pressure/composition choices remain architecture- and mission-dependent.
Sources and further reading
Downloadable scenario data
Dataset v1.1 documents every prefilled value: unit, system boundary, time basis, evidence status, and source when one exists.
Entry, descent and landing (EDL)
- Mars entry, descent and landing: understanding the full EDL chain
- Mars atmospheric entry: heat shield, entry corridor and guidance
- Mars parachutes and supersonic retropropulsion: where architecture changes
- Terrain-relative navigation, hazards and Mars landing-site selection
- Terminal descent, engine plumes and the Mars landing zone
- Human Mars lander: the EDL problem above 20 tonnes
Survive: ECLSS, health and resilience
- Mars habitat ECLSS: complete architecture of survival loops
- Mars habitat air: oxygen, CO₂, humidity and contaminants
- Mars water: 98% recovery, storage, quality and make-up
- Fire, depressurization and refuge: surviving habitat emergencies
- Mars radiation: shielding, dose and storm shelter
- Spacesuits, EVA and dust: working outside without contaminating the base
- Food, crops and medicine: biological and medical autonomy on Mars
- Psychology, fatigue and multiple failures: human resilience of a Mars base
Operations, industry, reliability and team
- Choosing a site and deploying a Mars base
- Mars surface mobility, robotics and logistics
- Mars ISRU industry, construction and local manufacturing
- Reliability, redundancy and common causes in a Mars base
- Durability, tightness, electronics and FDIR on Mars
- Mars maintenance, spares, qualification and configuration
- Crew operations, procedures and Earth-Mars communications
- Human factors, anomalies and training for a Mars team