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Updated: Oct 27, 2025

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Drone-Based Gamma Radiation Dose Distribution Survey with a Discrete Measurement Point Procedure.

Andras Molnar1, Zsolt Domozi2, Istvan Lovas2

  • 1John von Neumann Faculty of Informatics, Obuda University, Becsi ut 96/b, H-1034 Budapest, Hungary.

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Summary

A new method uses geographic information system (GIS) technology and multicopter-mounted sensors to create radiation dose distribution maps. This cost-effective system aids in locating radiation sources and mapping radioactive debris.

Keywords:
dose distribution measurement on fieldradiation measurement with droneradioactive mapping with drone

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Area of Science:

  • Environmental Science
  • Geographic Information Science
  • Radiation Detection

Background:

  • Classical imaging sensors are insufficient for certain radiation mapping tasks.
  • Discrete radiation measurements require interpolation for continuous mapping.
  • Geographic Information System (GIS) methods offer a solution for dose distribution mapping.

Purpose of the Study:

  • To develop a cost-effective method for creating radiation dose distribution maps using GIS.
  • To enable efficient radiation source localization and debris mapping.
  • To enhance radiation measurement efficiency using multicopters.

Main Methods:

  • Utilized GIS methods to create dose distribution maps from discrete sensor data.
  • Employed interpolation techniques on measured radiation values.
  • Calibrated and georeferenced maps using measurement point coordinates.
  • Developed and tested a lightweight (500g) detector system with a 120-min battery life.

Main Results:

  • Successfully created calibrated and georeferenced dose distribution maps.
  • Demonstrated the system's capability to detect 300 μSv/h sources from 10m altitude.
  • Achieved an average detection rate of 30 events/min in 0.01 μSv/h background radiation.

Conclusions:

  • The developed GIS-based method provides an efficient and cost-effective way to map radiation dose distributions.
  • The multicopter-based system is suitable for locating lost radiation sources or mapping accident debris.
  • The lightweight detector system enhances measurement efficiency and operational range.