GSNSW Exploration NSW Area A4 Koonenberry thorium grid geodetic

This GSNSW Exploration NSW Area A4 Koonenberry thorium grid geodetic is an airborne-derived radiometric thorium window countrate grid for the NSW DMR, Discovery 2000, 1994-95, AREA A4, Koonenberry survey. 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 thorium (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 GSNSW Exploration NSW Area A4 Koonenberry thorium grid geodetic has a cell size of 0.00063 degrees (approximately 65m). The data are in units of counts per second (or cps). The data used to produce this grid was acquired in 1995 by the NSW Government, and consisted of 67000 line-kilometres of data at 250m line spacing and 60m terrain clearance.

本数据集为GSNSW新南威尔士州A4区库恩伯里勘探大地测量钍网格数据，系针对新南威尔士州矿产资源局（NSW Department of Mineral Resources, DMR）"Discovery 2000"项目，于1994-1995年开展的A4区库恩伯里航空勘测所生成的航空衍生放射性钍窗口计数率网格。放射性测量法（或称伽马射线能谱法）通过检测地球表面附近的伽马射线自然变化实现测量，此类伽马射线源自钾（K，原文此处存在笔误，原标注为“thorium (K)”）、铀（U）与钍（Th）的自然放射性衰变。采集所得数据将通过标准流程处理，确保所记录的响应仅源于地下岩石。最终生成的数据集可用于解译地下地质构造。经处理的数据将由澳大利亚地球科学局（Geoscience Australia, GA）的地球物理学家开展质量核验，以确保该局发布的最终数据满足使用需求。
本数据集的网格单元尺寸为0.00063度（约65米），数据单位为每秒计数（counts per second, cps）。用于生成该网格的数据由新南威尔士州政府于1995年采集，涵盖67000线公里的测线数据，测线间距为250米，地形离地高度为60米。