Broome, WA, 2009 (North Canning 1) (P1211), radiometric line data, AWAGS levelled

The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This Broome, WA, 2009 (North Canning 1) (P1211), radiometric line data, AWAGS levelled were acquired in 2009 by the WA Government, and consisted of 76474 line-kilometres of data at 400m line spacing and 60m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

辐射测量法，亦称伽马射线能谱法，通过探测地表附近由钾（K）、铀（U）与钍（Th）自然放射性衰变产生的伽马射线自然变化量，开展相关测量。所采集的数据将通过标准流程处理，以确保记录到的响应仅来源于地下岩石。经处理得到的数据集可通过解译，揭示地下地质构造。GA的地球物理学家会对处理后的数据开展质量核查，以确保GA发布的最终数据符合使用要求。

本数据集为2009年由西澳州政府采集的西澳布鲁姆（Broome）地区2009年度（北坎宁1区，编号P1211）辐射测量测线数据，经全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey，AWAGS）校准。该数据集包含76474测线公里的数据，测线间距为400米，航空飞行离地高度为60米。为约束数据中的长波长信号，本次调查采用独立数据集——全澳航空地球物理调查（AWAGS）航空磁测数据——来控制测线数据的基准面。本测线数据本质上已校准至AWAGS基准。