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在核事故应急监测航空测量中，角响应函数Ｆ（，θ）是航测谱仪的基本刻度量。本文主要报道ＮａＩ（Ｔｌ）航测谱仪对１３７Ｃｓ和６０Ｃｏ点源角响应函数的地面刻度方法及其结果，其不确定度一般小于２０％。利用该结果，采用数值积分方法，对地表均匀分布的１３７Ｃｓ沉积面源，计算了安装在运五飞机上的ＮａＩ（Ｔｌ）航测谱仪（３箱晶体）不同飞行高度的刻度因子，不确定度小于３０％。在石家庄航测动态测试带的天然本底辐射场下，９０ｍ和１２０ｍ飞行高度下的最小探测限分别为３．８和５．６ｋＢｑ／ｍ２。
In the aviation accident monitoring air accident, the angular response function F (, θ) is the basic scale of the airborne spectrometer. In this paper, we mainly report on the ground calibration method and its results for the response function of 137Cs and 60Co source points of NaI (Tl) aircraft. The uncertainty is generally less than 20%. Based on the results, the scale factors of different flight levels of NaI (Tl) airborne spectrometer (3-box crystal) installed on the 5th aircraft were calculated by numerical integral method and the surface sources of 137Cs uniformly distributed on the surface were calculated. The uncertainty factors Less than 30%. The minimum detection limit at 90m and 120m flight levels is 3.8 and 5.6kBq / m2, respectively, under the natural background radiation field of Shijiazhuang aerospace dynamic test zone.