光学学报, 2018, 38 (9): 0928001, 网络出版: 2019-05-09
星上定标衰减屏特性的测试方法 下载: 798次
Measurement Method of Solar Attenuation Screen Characteristic for On-Orbit Calibration
遥感 透过率 测量装置 太阳光衰减屏 多项式拟合 remote sensing transmittance measurement device solar attenuation screen polynomial fitting
摘要
介绍了一套测量太阳光衰减屏透过率的测量装置。该装置需要测量两组数据:安装太阳光衰减屏和不安装太阳光衰减屏透过的信号值,通过求两者在相同几何条件下比值的方式得出了衰减屏的透过率。提出采用多项式拟合插值的方式解决在轨角度密集的问题,计算可知拟合插值引入的不确定度优于0.04%。数据结果显示,衰减屏的平均透过率为13.3%,结果的总不确定性优于0.54%(覆盖因子k =2)。结果表明,该装置能够为太阳光衰减屏在轨使用提供数据支持。
Abstract
A set of measuring device for the transmittance of the solar attenuation screen is introduced. Two set of data are required: light signals transmitted through the test fixture with and without the solar attenuation screen. Then the solar attenuation screen transmittance is the ratio of the screen-on data to the screen-off data under the same geometric condition. The method of polynomial fitting interpolation is proposed, which is used to solve the problem of dense on-orbit angle. The error of the method is less than 0.04%. The results show that the average transmittance of the solar attenuation screen is 13.3%, and the uncertainty of the device is better than 0.54% (covering factor k=2). The results indicate that the device can provide data support for the use of the solar attenuation screen on orbit.
汪伟, 张黎明, 黄文薪, 杨宝云, 王戟翔, 许和鱼, 包诗薇. 星上定标衰减屏特性的测试方法[J]. 光学学报, 2018, 38(9): 0928001. Wei Wang, Liming Zhang, Wenxin Huang, Baoyun Yang, Jixiang Wang, Heyu Xu, Shiwei Bao. Measurement Method of Solar Attenuation Screen Characteristic for On-Orbit Calibration[J]. Acta Optica Sinica, 2018, 38(9): 0928001.