CM-1卫星星敏感器在轨测量精度初步评价
Preliminary Evaluation of on Orbit Measurement Accuracy of CM-1 Star Sensors
丁宝帅 1李国元 1艾波 2王伶俐3
作者信息
- 1. 山东科技大学测绘与空间信息学院,山东青岛 266590;自然资源部国土卫星遥感应用中心,北京 100048
- 2. 山东科技大学测绘与空间信息学院,山东青岛 266590
- 3. 自然资源部国土卫星遥感应用中心,北京 100048;北京国测星绘信息技术有限公司,北京 100040
- 折叠
摘要
星敏感器是目前主流的高精度姿态测量仪器,在轨运行期间星敏感器会产生系统误差、高频误差和低频误差.文章进行了陆地生态系统碳监测卫星(CM-1卫星)星敏感器系统误差与高频误差的计算,分析了星敏1a与1b的光轴夹角误差与卫星星下点纬度的变化规律,基于傅里叶变换对光轴夹角低频误差进行建模,并以此来反映两星敏感器的低频误差.在轨数据表明,星敏1a旋转至星敏1b以及星敏1a旋转至2的系统误差分别为(6.906',-12.569',-1.552')和(-4.540',-27.199',13.522').星敏数据中精度最高的是星敏 1a/1b融合数据,三轴误差分别为0.505"、0.633"和0.800".同组的星敏1a和1b精度类似,星敏1a三轴误差分别为0.990"、0.981"和16.731",星敏2a三轴误差分别为0.888"、1.022"和15.156".星敏2精度稍差,三轴误差分别为2.061"、2.382"和27.231";星敏1a与1b光轴夹角误差(3a)为2.50",光轴夹角低频和高频误差分别为2.046"和1.470".在相邻轨道星下点纬度相同时光轴夹角误差基本相同.
Abstract
Star sensor is currently the mainstream high-precision attitude measurement instruments,during orbit operation,it will generate system error,high-frequency error,and low-frequency error.This paper calculates the system error and high-frequency error of the terrestrial ecosystem carbon monitoring satellite(CM-1)star sensors,analyzes the rule of the optical axis angle error of the star sensor 1a and 1b and the latitude of the satellite,and models the optical axis angle low-frequency error based on the Fourier series transform,and in this way reflects the low-frequency error of the two star sensors.The on-orbit data show that the system error for rotating star sensor 1a to star sensor 1b and star sensor 1a to 2 is(6.906',-12.569',-1.552')and(-4.540',-27.199',13.522'),respective1y;the highest accuracy among the data of star sensor is the fusion of star sensor 1a/1b data,the error of three axis is 0.505"0.633"and 0.800".The precision of the same group of star sensor 1a and 1b is similar,the error of three axis of star sensor 1a is 0.990",0.981"and 16.731",and the error of three axis of star sensor 2a is 0.888",1.022"and 15.156".The precision of star sensor 2 is slightly worse,with the error of three axis of 2.061",2.382"and 27.231".The optical axis angle error(3σ)of star sensor 1a and 1b is 2.50",and the low-frequency and high-frequency error of the axis angle between the optical axis is 2.046"and 1.470",respectively.The optical axis angle error is basically the same in the neighboring orbital with the same latitude of the satellite.
关键词
陆地生态系统碳监测卫星/星敏感器/系统误差/高频误差/低频误差/光轴夹角误差Key words
CM-1/star sensor/systematic error/high-frequency error/low-frequency error/optical axis angle error引用本文复制引用
基金项目
&&(BM2312)
国家自然科学基金(41971425)
出版年
2024
NETL
NSTL
万方数据