yunqianz/purpleair-calibration

PurpleAir Temperature Calibration

Calibrate hourly PurpleAir temperature readings with models developed from 797,744 observations across 31 U.S. states.

The app provides:

• —CSV upload with automatic column detection and explicit mapping
• —Direct calibration from five standard PurpleAir fields
• —Exact 63-feature Temporal-National paper model for ERA5-enriched data
• —Sensor-isolated temporal feature engineering
• —Row-level model provenance and history status
• —Interactive checks, calibrated CSV export, and a method report

The final paper model achieved 0.64°C MAE, 0.87°C RMSE, and R² = 0.992 on the held-out test set. Direct calibration uses separately validated sensor-only models and displays their metrics in the Method & limits tab.

Source code: <https://github.com/yunqianz728/purpleair-calibration>

Code archive: <https://doi.org/10.5281/zenodo.18463819>