航天传感器响应波段星等计算方法  

Calculation Method for Response Band Magnitude of Aerospace Sensors

作　　者：勾万祥 贾靖玉 陈少杰 李崇辉 郑勇[1] GOU Wanxiang;JIA Jingyu;CHEN Shaojie;LI Chonghui;ZHENG Yong(School of Geospatial Information,Information Engineering University,Zhengzhou 450001)

机构地区：[1]信息工程大学地理空间信息学院,郑州450001

出　　处：《空间科学学报》2023年第5期916-926,共11页Chinese Journal of Space Science

基　　金：河南省自然科学基金项目资助(212300410421)。

摘　　要：精确的恒星星等信息是开展导航星表建立、航天器定姿、红外相机定标等工作的基础,现有公开星表涵盖测光波段不全且带宽普遍较窄,难以找到与任务传感器响应波段相匹配的星等信息。为此提出了一种基于恒星辐射光谱的传感器响应波段星等计算方法。该方法利用公开星表数据信息,建立星表测光波段与传感器响应波段星等差值模型,对星表星等与传感器响应波段星等差值进行估算;将色指数计算的恒星近似表面温度作为先验信息,在传感器响应波段区间进行普朗克方程求解,进而推算恒星在传感器响应波段的星等。星表数据计算验证表明,该方法具有较好的稳健性和适应性,对传感器响应波段星等推导精度为0.066等(1δ),93.3%恒星推算误差优于0.2等,可满足导航星表建立、航天器定姿、红外相机定标等应用需求。Accurate stellar magnitude information is the foundation for conducting navigation star catalog establishment,spacecraft attitude determination,infrared camera calibration,and other work.The existing public star catalogs do not cover all the photometry bands and the bandwidth is generally narrow,making it difficult to find magnitude information that matches the response bands of the mission sensors.A method for calculating the magnitude of sensor response bands based on stellar radiation spectra is proposed.This method utilizes publicly available catalog data information to establish a model for the magnitude difference between the photometry band of the catalog and the sensor response band,and estimates the magnitude difference between the catalog magnitude and the sensor response band.Using the approximate surface temperature of the star calculated by the color index as prior information,the Planck equation is solved in the sensor response band range to calculate the magnitude of the star in the sensor response band.The verification of star catalog data calculation shows that the method has good robustness and adaptability,and the star magnitude derivation accuracy of sensor response band is 0.066 magnitude(1δ),93.3%of the star estimation error is better than 0.2 magnitude,which can meet the needs of navigation star catalog establishment,spacecraft attitude determination,infrared camera calibration,and other applications.

关 键 词：星等 色指数 传感器 响应波段 黑体辐射 辐流量 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]