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大气地表参数的自动化观测是实现遥感卫星高频次、高实效场地定标能力的基本前提。为检验场地自动化观测辐射定标（AORC, Automated Observational Radiometric Calibration）的准确性，2015 年 8 月在敦煌辐射校正场开展了相应的定标试验。采用通道式自动化场地辐射计（ATR, Automated Test-site Radiometer）测量地表反射，结合 CE318 观测的大气参数和漫总比辐照度仪观测的漫总比数据，计算出卫星 过 顶 时 刻 的 高 光 谱 地 表 反 射 率 。 基 于 反 射 率 基 法 对 MODIS(Moderate-Resolution Imaging Spectroradiometer)/Aqua 和 MODIS/Terra 的可见近红外波段 1~7 开展了场地自动化观测绝对辐射定标试验。结果表明，场地自动化观测定标方法与 MODIS/Aqua、MODIS/Terra 星上获取的表观辐亮度相对偏差平均值分别小于 2.8%和 3.5%。这说明场地自动化观测定标方法与人工定标方法具有同等水平的定标精度，验证了场地自动化观测定标方法的可行性。
The automatic observation of atmospheric surface parameters is the basic prerequisite for the calibration of remote sensing satellites with high frequency and high efficiency. In order to verify the accuracy of the AORC (Automated Observational Radiometric Calibration), a corresponding calibration test was conducted at the Radiation Correction Field in Dunhuang in August 2015 The surface reflectance was measured by the ATR (Automated Test-site Radiometer), and the total atmospheric ratio of CE318 and the ratio of total diffuse reflectance were used to calculate the hyperspectral spectrum Surface reflectivity. Based on the reflectivity method, the field-based automatic observation of absolute radiation calibration was carried out on the MODIS (Moderate-Resolution Imaging Spectroradiometer) / Aqua and MODIS / Terra visible near infrared bands 1 ~ 7. The results show that the average relative deviation of apparent radiances obtained from the site-based automated observing and calibration methods and MODIS / Aqua and MODIS / Terra stars are less than 2.8% and 3.5% respectively. This shows that the site automation method of observing and calibrating has the same level of calibration accuracy as the method of manual calibration, and verifies the feasibility of site-based automatic observing and calibrating methods.