空间CCD相机辐射标定方法的应用研究

Radiometric Calibration of the Space CCD Camera

为了使空间CCD相机对不同辐亮度的地面目标获得合适的推扫图像,根据空间相机实际工作环境计算出不同使用条件下相机入口处辐亮度.在地面建立了CCD相机辐亮度标定装置,并对此装置的传递可靠性指标进行了测试,总误差不大于5.3%,可以在地面对CCD相机进行辐射标定.实验结果表明:相机入口处辐亮度计算准确,通过地面标定,可在实际工作环境下获得最佳的最终图像.

In order to acquire precision pushbroom images at different radiance of the earth object, and according to the working environment of space camera. The radiance at camera entrance port in difference space condition was calculated. The radiometric calibration instrument is established and the transfer reliability of the instrument is tested, and its uncertainty of radiance is less than 5.3% which meets the demand of calibrating radiance in the lab. The results of experiment show that the calculation of the radiance at camera entrance port is accurate and the pushbroom images with high quality can be obtained through the calibration on the ground.