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Related Experiment Video

Updated: Jun 21, 2026

A Two-interval Forced-choice Task for Multisensory Comparisons

A Two-interval Forced-choice Task for Multisensory Comparisons

Published on: November 9, 2018

IASON-FREE: theory and experimental comparisons.

E Felsberger¹, K O'Brien, P Kindl

¹IASON GmbH, Feldkirchner Strasse 4, A-8054 Graz-Seiersberg, Austria. Ernst.Felsberger@iason.eu

Radiation Protection Dosimetry

|July 18, 2009

Summary

The Flight Route Effective Dose Estimation (FREE) code accurately predicts radiation doses during flights. Comparisons with recent measurements show excellent agreement for undisturbed conditions and satisfactory results for transient effects.

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Area of Science:

Aerospace Engineering
Radiation Physics
Computational Science

Background:

Accurate estimation of radiation doses during flight is crucial for commercial aviation.
Existing models may not fully account for all environmental factors and dependencies.

Purpose of the Study:

To introduce and validate the Flight Route Effective Dose Estimation (FREE) code.
To assess the accuracy of the FREE code by comparing its predictions to real-world measurements.

Main Methods:

Development of a sophisticated flight code (FREE) incorporating detailed dependencies.
Estimation of radiation doses and dose rates considering various flight factors.
Comparison of FREE code predictions with recent measurements under both quiescent and disturbed conditions.

Main Results:

The FREE code demonstrates excellent agreement with measurements under undisturbed flight conditions.
Satisfactory agreement is observed when comparing transient effects predicted by the code with measured data.

Conclusions:

The FREE code provides a reliable tool for estimating flight radiation doses for commercial use.
The code's ability to accurately model both steady-state and transient radiation environments is validated.