GF-4 is the China’s first array staring-imaging optical remote-sensing satellite with high resolution. The payload of GF-4 satellite firstly uses array CMOS sensors and images in the 36 000km high orbit. It is first time to apply in-orbit relative radiometric correction model, and to make in-orbit calibration and geometric correction of array camera optical distortion based on array imaging. This paper firstly analyzes the critical factors in GF-4 satellite image’s radiance quality and geometric accuracy, then introduces a technological method of building the processing model of high-orbit array imaging, and finally analyzes and evaluates the radiance quality, geometric quality and processing accuracy of GF-4 images. The experimental results show that the indexes of radiance accuracy of GF-4 PMS images, are all better than 3%, including average line standard deviation, mean standard deviation and generalized noise, and the signal-to-noise ratio of typical surface features is better than 40dB; and the internal geometric distortions in vertical orbit and along orbit directions are better than 0.8 pixel.%“高分四号”（GF-4）卫星是中国首颗高分辨率静止轨道面阵凝视光学遥感卫星，载荷首次采用面阵CMOS探测器在36000km高轨成像、基于面阵成像构建在轨相对辐射校正模型、面阵相机光学畸变在轨检校。文章首先分析了影响GF-4卫星影像辐射质量（quality，以下同）与几何精度的关键因素，然后介绍了高轨面阵成像处理模型的构建技术，最后分析评价了 GF-4卫星影像的辐射质量、几何质量和处理精度。结果表明：GF-4号卫星全色多光谱影像的平均行标准差、平均标准差和广义噪声等相对辐射精度指标均优于3%，典型地物信噪比平均优于40dB。影像内部畸变在垂轨和沿轨方向均优于0.8个像素。
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