Extensive Environmental Monitoring Dataset from the Rad Nano Dosimeter Experiment of the Axiom‑4 Spaceflight

This dataset contains continuous, multi-parameter environmental measurements recorded during the Axiom-4 (Ax-4) human spaceflight mission using ten RadNano Infinity Astronaut Dosimeter units from 27G-Technology. The data span the complete operational period from pre-launch activation at the Kennedy Space Center (8 June 2025) through ISS operations and return to Earth (15 July 2025). The repository includes UTC-timestamped measurements of air temperature, infrared target temperature, instrument temperature, relative humidity, atmospheric pressure, light intensity (front and rear), carbon dioxide concentration (eCO₂), indoor air quality index (IAQ), total volatile organic compounds (TVOC), and three-axis magnetic flux density with calculated resultant magnitude. All files are provided in machine-readable CSV format with consistent variable naming and accompanying documentation and plot software to support reproducibility, secondary analysis, and integration into environmental, human research, and spaceflight studies.