Exploration Transit PathSPEC Section 8Illustrative Scientific Metric, Not a Flight Trajectory

Mission Atmosphere Gap Finder (Exploration Transit Path)

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1. Nearest-Evidence Vector Bridge (Lunar & Spacesuit)

Breakdown of the parameter gap (ΔO₂, ΔPressure, and gravity) between exploration waypoints and nearest flight rows.

Exploration Waypoint Nearest-Evidence Vector Bridge

Documentation distance from planned exploration atmospheres to the nearest empirical NASA PSI table rows.

Target Exploration Point

Lunar Habitat

Oxygen: 34% O₂

Pressure: 8.2 psi (56.5 kPa)

Gravity: 0.16 g (Moon)

Source: NASA NTRS-20210022143

Parameter Gap Vector (Δ)

TargetPSI Nearest

ΔO₂: +4.0%

ΔPressure: -2.13 psi

ΔGravity: Missing partial-g axis

Normalized 2D Distance: 0.1503

Nearest Measured Table Row

FLEX (PSI-69) Test 24

Oxygen: 30.0% O₂

Pressure: 10.33 psi (534.3 mmHg)

Gravity: Microgravity (~10⁻⁶ g)

DOI: 10.60555/flex-psi69 · Flight Table Row

Scientific Disclaimer (SPEC Section 8):Distance measures documentation distance across normalized parameter axes, not hazard severity. Because NASA PSI holds zero partial-gravity records, bridge extrapolation is deterministically refused.

Flow Regime & Mission Atmosphere Simulator

Atmospheric Mission Presets:

Oxygen Concentration (O₂)

% O₂

0% (Hypoxic)21% (Air)30% (Threshold)34% (Lunar)100% (Pure O₂)

Stream Context:

Chamber / Ambient Pressure

psi

0 psi (Vacuum)4.3 psi (Suit)8.2 psi (Lunar)10.2 psi (Cutoff)14.7 psi (1 atm)25 psi

Equiv: 101.4 kPa · 760 mmHg1 psi = 6.894757 kPa

Gravity / Acceleration Regime:

Forced Airflow Configuration:

Calibrated Speed:cm/s

Calibrated cm/s: BASS-II Table 5.1 (M1–M20)

Physical Flow Regime Classification

Low-Velocity Ventilated / Mixed Convective-Diffusive Regime (0.1 – 10 cm/s)

Transport Schematic

Slow forced cabin airflow supplies fresh oxidizer without inducing blowoff. This represents the peak spacecraft fire hazard explored in BASS-II and SAFFIRE where flame spread can exceed 1g rates.

Velocity: 5 cm/sDirection: concurrentGravity: μg (~10⁻⁶ g)

Waypoint: iss_cabin

ISS Cabin Reference

O₂: 21% · P: 14.7 psi

Standard Earth-normal pressurized station cabin environment.

Waypoint: lunar_habitat

Lunar Habitat

O₂: 34% · P: 8.2 psi

Exploration atmosphere targeted for future pressurized lunar surface habitat.

Waypoint: spacesuit

Spacesuit EVA

O₂: 100% · P: 4.3 psi

Pure-oxygen low-pressure extravehicular activity spacesuit environment.

2. Continuous Transit Trajectory Distance Curve

101 discrete transit steps from ISS (Step 0) to Lunar Habitat (Step 50) to Spacesuit EVA (Step 100).

Step 30 / 100 Selected

Step 0 (ISS Cabin)Trajectory Position: Step 30 (ISS Cabin -> Lunar Habitat)Step 100 (Spacesuit)

Atmosphere28.8% O₂ · 10.8 psi

Evidence Distance0.0000

Nearest PSI TablePSI-68

SegmentISS Cabin -> Lunar Habitat