基于“吉林一号”视频系列卫星开展空间目标光度测量试验，阐述了视频星对空间目标成像以及光度反演原理，利用相机探测器输出图像的灰度值反演计算目标光度学特征.根据误差传递原理分析了辐射定标系数偏差和目标图像噪声对反演精度的影响，并以恒星作为标准辐射源对反演精度进行验证，结果表明恒星类点目标光度反演误差小于0.15 Mv.列举了空间目标拍摄及反演结果样例，并对视频星观测试验结果进行了统计和说明，得到视频星的极限探测距离、捕获概率以及观测效能，分析结果表明视频星的灵活成像模式可较好地适用于空间目标观测任务.

Experiments on measuring the photometric characteristics of space targets were conducted based on Jilin-1 video satellites, the method of using video satellite to image space targets and perform luminosity inversion were demonstrated. The inversion and estimation on luminosity characteristics of targets was based on grey scale value of output images from camera sensor. An analysis on the effect from the error of radiation calibration coefficient and image noise on the inversion precision was also conducted based on the principle of error transfer. By using star targets as the standard radiation source, the inversion precision was verified. Results show the error of luminosity inversion is less than 0.15 magnitude. A statistics analysis on targets filmed by Jilin-1 satellites was performed and examples were listed, giving estimation on the maximum sensing distance, probability of target capture and the observation performance. Results show that the agile imaging mode of video satellite which is designed for ground remote sensing performs well in space target observation as well.