Measurements on concorde of the cosmic radiation field at aviation altitudes

The results are reported of the first three years of a five year measurement programme of average route doses on board Concorde. Measurements of the complex cosmic radiation field are made with a passive survey meter comprising thermoluminescent detectors and etched track detectors. The 15% determination level for total dose equivalent is 100 mu Sv. The evidence is that the passive survey meter provides a reliable determination of route dose. The average route effective dose for a return flight by Concorde between London and New York measured during the period January 1997 to October 1999, was 74 mu Sv.