摘要
为了提高在轨太阳光谱辐射的绝对定标精度,提出了太阳光矢量和太阳光谱仪主光轴夹角的测量方法。以图像处理技术为基础,构造了太阳光矢量和太阳光谱仪主光轴夹角的测量系统。入射的太阳光经在成像器件上成像,然后经过图像处理,获取了太阳光像点中心的位置,进而计算了太阳光矢量和与太阳光谱仪主光轴的倾角。实验表明测量方法是有效的,测量系统工作可靠稳定,测量精度约为0.05°。
Measuring method of angle between sun light and optical axis of solar spectrometer is proposed to improve precision of absolute calibration for solar spectral irradiance.Measuring system is constructed to obtain the angle between sun light and optical axis of solar spectrometer.The sun light falls in to the imaging device and the image is grabbed.Central position of sun ＇s image is obtained through image processing.Then angle between sun light and optical axis of solar spectrometer is calculated.Experiments have indicated that the measuring method is validated,and the measuring system work reliably.Measuring precision is about 0.05°.
出处
《微计算机信息》
2011年第6期4-6,共3页
Control & Automation
基金
自然科学基金(61077080)
航天光谱仪新理念高精度在轨绝对辐射定标方法研究(1.基金申请人:方伟2.基金资助项目名称:航天光谱仪新理念高精度在轨绝对辐射定标方法研究3.基金颁发部门:中国国家自然科学基金委员会)
关键词
图像处理
光谱仪
辐射定标
太阳辐射
Image processing
Spectrometer
Radiation calibration
Solar radiation
