航空γ射线能谱测量数据处理的常规方法是对三个相对宽的能谱窗中实测谱进行一次求和,然后对三个能窗中的计数率进行处理以获得经计算的K、U、Th元素丰度。实际上多道谱包含了附加源的K、U、Th的含量,源与探测器间隙间的信息以及大气氡对实测谱的相对影响的信息。采用多道处理方法可以将这些信息剥离出去。 实测谱被认为是三种大地上的和三种本底组分谱的总和,可由适当的航空和地面校正方法来确定。本底组分可以单独计算,并从实测谱中剥离出来。以大地上的组分作为模拟探测器高度函数的主成分分析而获得的参数模型可求出有效高度上K、U、Th的大地上的组分,该模型可较好地应用到经本底修正了的航测资料中 A common approach to the processing of air gamma ray spectrometry data is to once sum the measured spectra in three relatively wide energy spectrum windows and then process the count rates in the three energy windows to obtain the calculated K, U, Th element abundance. In fact, multichannels contain information on the K, U, Th contents of additional sources, the information between source and detector gaps, and the relative influence of atmospheric radon on the measured spectrum. Multi-channel processing can be stripped of these information. The measured spectrum is considered as the sum of the three earthborne and the three background component spectra, which can be determined by appropriate methods of aviation and ground correction. The background components can be calculated separately and stripped from the measured spectrum. The parameter model obtained from the principal component analysis using the component on the earth as the height function of the simulated probe can obtain the composition of the earth at K, U and Th at the effective height, which can be well applied to the background Corrected aerial survey data