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Remote Sens. 2016, 8(11), 892; doi:10.3390/rs8110892

Investigation of Snow Cover Effects and Attenuation Correction of Gamma Ray in Aerial Radiation Monitoring

1
Nuclear Safety Research Center, Japan Atomic Energy Agency, 2-4 Shirane Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
2
Fukushima Environmental Safety Center, Japan Atomic Energy Agency, 45-169 Sukakeba, Kayahama-aza, Haramachi, Minamisoma, Fukushima 975-0036, Japan
*
Author to whom correspondence should be addressed.
Academic Editors: Dongdong Wang, Richard Müller and Prasad S. Thenkabail
Received: 29 June 2016 / Revised: 28 September 2016 / Accepted: 20 October 2016 / Published: 28 October 2016
View Full-Text   |   Download PDF [6600 KB, uploaded 28 October 2016]   |  

Abstract

In aerial radiation monitoring (ARM), the air dose rate cannot be appropriately estimated under snowy conditions due to attenuation of gamma rays by the snow layer. A technique to address this issue is required for ARM to obtain enough signals for air dose rates. To develop this technique, we investigated the relationship between snow depth and ARM measurement results using ARM, laser imaging detection and ranging, and ground measurement before and after snowfall. From the measured data, the results obtained using three different correction factors were examined and compared. An appropriate correction improved the underestimation of the air dose rate. However, further improvement in the accuracy of the analysis requires accurate estimation of the snow water equivalent. View Full-Text
Keywords: aerial radiation monitoring; Fukushima Daiichi nuclear power station disaster; air dose rate; LiDAR aerial radiation monitoring; Fukushima Daiichi nuclear power station disaster; air dose rate; LiDAR
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ishizaki, A.; Sanada, Y.; Mori, A.; Imura, M.; Ishida, M.; Munakata, M. Investigation of Snow Cover Effects and Attenuation Correction of Gamma Ray in Aerial Radiation Monitoring. Remote Sens. 2016, 8, 892.

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