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Report No.

Advancement of airborne radiation measurement technology, 1; Contribution of position precision by GPS for manned helicopter monitoring

Mori, Airi; Sanada, Yukihisa ; Seguchi, Eisaku; Kawabata, Tomoki; Munakata, Masahiro

Count rates of radiation and the positional information (latitude, longitude, and height) are acquired simultaneously in airborne monitoring. The precision of positional information affects the air dose rates at 1 m height because air dose rates at 1 m height are calculated by correction of height. In this study, 3 GPS devices are used in addition to 1 GPS device which has been used in previous airborne monitoring. The most appropriate GPS device were determined by comparing precisions of positional information and influences on air dose rates at 1 m height.



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