Upload a year of flights. We run each segment through the FAA's CARI-7 cosmic radiation model (the same one used to certify aircrew exposure) and return a 14-page PDF: annual effective dose in millisieverts, ICRP-103 limit comparisons, polar-route attribution, and recommendations indexed to your flying pattern.
Fig. 1 — Galactic cosmic ray flux penetration vs. altitude. Effective dose rate at FL390 (11.9 km) is approximately 100× surface background, and rises further at high geomagnetic latitudes.
Excerpts from a real FlightRadiation PDF. Subject anonymized; pattern is representative of a US-based consultant with mixed domestic + transatlantic flying.
| Segment class | Count | Avg FL | Mean dose / seg |
|---|---|---|---|
| Domestic medium-haul (US) | 80 | FL360 | 14 µSv |
| Transcontinental (JFK↔SFO) | 12 | FL380 | 42 µSv |
| Transatlantic (incl. polar leg) | 4 | FL390 | 78 µSv |
High-latitude polar segments (4 transatlantic crossings routed >60°N) account for 38% of total annual dose despite representing only 4.2% of segments. Geomagnetic shielding falls steeply north of 60°, and solar-particle event risk concentrates here.
| Public, non-occupational (annual) | 1 mSv |
| FAA aircrew action level (annual) | 6 mSv |
| Occupational limit, averaged 5 yr | 20 mSv/yr |
| Pregnant crew, gestation period | 1 mSv |
Holding pattern constant, projected cumulative dose over a 30-year career: 162 mSv. This is 162× the ICRP-103 non-occupational annual limit, and remains below the occupational career limit but enters the band where epidemiological signal is detectable.
The model, the assumptions, and the limits.
Per-segment galactic cosmic radiation transport calculation using the same MCNPX-based code the FAA publishes for aircrew dosimetry. Inputs: origin, destination, great-circle vs. filed route, cruise FL, climb/descent profile, departure date (for heliocentric potential).
Effective dose is computed with ICRP-103 tissue weighting factors. We report against ICRP-103 public, occupational, and gestational limits, not against older ICRP-60 values still seen in some operator documentation.
A flight log: dates, origin, destination. CSV, screenshot of TripIt / FlightRadar24 / a frequent-flier statement, or paste it in. We infer typical cruise FL by aircraft type and route. Pilot logbooks accepted.
This is a population-level dose estimate, not a medical diagnosis. Individual risk depends on age, sex, prior exposure history, and stochastic factors outside the model. We do not model in-flight SPEs unless you supply specific dates flown during a logged event.
Submit your flight log. Get back a CARI-7 / ICRP-103 dose report, indexed to your pattern, with reducible-dose recommendations.
Enter your route, altitude, and travel pattern. We integrate the CARI-7 / ICRP-103 dose model and email a PDF in under a minute.