The effect of flight line spacing on radioactivity inventory and spatial feature characteristics of airborne gamma-ray spectrometry data
The effect of flight line spacing on radioactivity inventory and spatial feature characteristics of airborne gamma-ray spectrometry data
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DOI：
10.1080/01431160701268970
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发表时间：
2008-01-01
影响因子：
3.4
通讯作者：
White, D. C.
中科院分区：
文献类型：
--
作者：
Sanderson, D. C. W.;Cresswell, A. J.;White, D. C.
航空伽马能谱仪（AGS）非常适合于环境中放射性的测绘。飞行参数（例如速度和测线间距）直接影响任何测量的区域覆盖率、成本和数据质量。线间距的影响进行了调查的数据从潮间带，沿海和高地环境的Cs-137活动的浓度和沉积历史的范围。估计的综合Cs-137活动（“库存”）在指定的地区和沉积特征的形状进行了计算，在不同的线间距的数据的子集。具有大于线间距的尺寸的特征显示小于3%的库存和面积的变化，并且具有小于线间距的尺寸的特征显示更大的变化和降低的检测概率。任务的线间距的选择取决于感兴趣的特征的尺寸和所需的边缘定义。建议为不同任务提供行间距选项。据指出，对于区域测绘，即使5-10公里的测线间距也能产生有用的数据。
Airborne Gamma Spectrometry (AGS) is well suited to the mapping of radioactivity in the environment. Flight parameters (e.g. speed and line spacing) directly affect the rate of area coverage, cost, and data quality of any survey. The influences of line spacing have been investigated for data from inter-tidal, coastal and upland environments with a range of Cs-137 activity concentrations and depositional histories. Estimates of the integrated Cs-137 activity ('inventory') within specified areas and the shapes of depositional features were calculated for subsets of the data at different line spacings. Features with dimensions greater than the line spacing show variations in inventory and area of less than 3%, and features with dimensions less than the line spacing show larger variations and a decreased probability of detection. The choice of line spacing for a task is dependent on the dimensions of the features of interest and required edge definition. Options for line spacing for different tasks are suggested. It is noted that for regional mapping, even 5-10 km line spacing can produce useful data.