Radioactivity and Air Dose Rate
（2013）
ＱHow has the distribution of air dose rates been investigated?
ＡFor measurement of air dose rates, appropriate methods for investigation have been applied according to spatial resolution of the method and the scale of the area: from wide regions to specific spots.
◆ Airmonitoring : Radiation detectors are loaded on a helicopter
◆ Car-borne survey, Person-borne survey : A radiation detector is loaded on a car or on a person.
◆ Survey meter : Air dose rate in a spot depending on the radiation level.
(Cited from website of the Nuclear Safety Technology Center)