In flight comparison of ambient dose equivalent rate measured with a Tissue Equivalent Proportional Counter (TEPC), considered as the reference instrumentation for cosmic radiation dosimetry, and an OpenRadiation detector (kit version with a SBM20 Geiger Muller tube). A specific calibration factor for cosmic radiation is used for the GM tube detector (0.016 μSv.h⁻¹.cts⁻¹.min). Measurements were taken aboard an Airbus A380 during a flight between Paris and Shanghai on June 15th 2019.