摘要
空间目标的光度特性能够反映其在轨的运动状态和姿态,通过对空间目标光度的测量,可以确定其状态和姿态。首先分析了传统光度计光度测量方法,然后给出了用CCD进行光度测量的方法,该方法通过测量多颗星等已知恒星的灰度值,通过光度的定义公式推导出"0"等星的灰度值。进行光度测量时,得到待测星的灰度值之后再与"0"星等灰度值比较,计算出待测星的星等。在计算"0"星等灰度值与反算待测星星等时充分考虑了大气消光对测量结果的影响,并按照消光公式对测量结果进行了修正。试验结果表明,基于CCD的光度测量方法精度优于0.2星等。
The photometric characteristics of the space target can reflect its motion state in the orbit and attitude,and by measuring the photometric,its state and stance can be determined.Traditional photometer photometric measurements are analyzed,and then a photometric measurement method based on CCD is proposed.In this method,the star＇s gray value of known magnitude is measured,and then the gray value of ＂0＂ magnitude is obtained by the definition of formula of photometry.By photometric measurements,the gray value of the test star is compared with that of ＂0＂ magnitude,then the magnitude of the test star is calculated.When calculating ＂0＂ magnitude gray-scale and inverse calculating the magnitude of the test star,it is taken full account of the atmospheric extinction on the measurement results,and the measurement results are corrected in accordance with the formula for extinction.Test results show that the accuracy error of CCD photometry method is less than 0.2 magnitude.
出处
《半导体光电》
CAS
CSCD
北大核心
2012年第5期752-755,共4页
Semiconductor Optoelectronics
基金
四川省科技厅基金资助项目(2009JY0115)
关键词
光度测量
光度计
星等
大气消光
photometric measurement
photometer
magnitude
atmospheric extinction
