Ashton, WA,1994 (P623), 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 Ashton, WA,1994 (P623), radiometric line data, AWAGS levelled were acquired in 1993 by the WA Government, and consisted of 51484 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（或称伽马能谱法）旨在测量地球表面附近探测到的伽马射线自然变化，这些变化由钾（K）、铀（U）和钍（Th）的天然放射性衰变所引发。采集的数据经标准方法处理，确保记录的响应仅来源于地下岩石。处理结果生成的数据集可通过解译揭示地下地质结构。澳大利亚地球科学局（GA）的地球物理学家会对处理后的数据进行质量核查，以保证GA发布的最终数据满足预期用途。

这套1994年西澳大利亚州（WA）Ashton地区（编号P623）的经全澳航空地球物理调查（AWAGS）校正的辐射测量线数据，由西澳大利亚州政府于1993年采集，包含51484线公里的数据，线间距400米，地形净空高度60米。为约束数据中的长波长成分，研究采用独立的全澳航空地球物理调查（AWAGS）航空磁测数据来控制本调查数据的基准面。本调查数据本质上已校正至AWAGS基准。