Data Acquisition and Processing-Helicopter Radiometric Survey, Kragerø, 1998

Abstract

On 07 October, 1988, a helicopter radiometric survey was flown in the vicinity of Kragerø municipality. The purpose of the survey was to provide radiometric information to help assess radon hazard from radioavtive rocks in the area. A total of 60 line-kilometers of radiometric data were acquired in a single flight, covering an area of approximately 3 square km with a 50-m line spacing. The data were collected by The Geological Survey of Norway (NGU) personnel and processed at NGU. Radiometric data were reduced using the three-channel proce- dure recommended by the International Atomic Energy Association. All data were gridded using square cells with 30-m sides and geophysical maps were produced at a scale of 1:5000. This report covers aspects of data acquisition and processinf.