无线电工程2025，Vol.55Issue(12)：2335-2343,9.DOI:10.3969/j.issn.1003-3106.2025.12.002
四维高景一号01/02星在轨相对辐射定标与验证分析
On-orbit Relative Radiometric Calibration and Validation for Siwei Gaojing-1 01 and 02 Satellites
摘要
Abstract
The Siwei Gaojing-1 01 and 02 satellites are commercial optical satellites with agile imaging capabilities.These satellites can perform various imaging modes,including multi-band stitching imaging,stereoscopic imaging,multi-target imaging,multi-angle imaging and active push-broom imaging.The satellites provide images with a resolution of no less than 0.35 meters and are primarily designed to meet market demands in applications such as target recognition,flood detection,building extraction,and vegetation coverage analysis.To improve the radiometric calibration accuracy of the Siwei Gaojing-1 01 and 02 satellites and meet the demands for quantitative remote sensing data,massive on-orbit observation data are utilized to implement a statistical calibration method.This approach addresses the nonlinear response variations in the sensor channels,which typically cause poor calibration performance in the low and high brightness ranges,thus enhancing the relative radiometric calibration accuracy.Using quantitative evaluation metrics including generalized image noise,mean standard deviation,and row-wise mean standard deviation,the calibration results indicate significant improvements.For the Gaojing-1 01 satellite,the average values of generalized noise,mean standard deviation,and row-wise standard deviation after calibration are 2.491％,2.267％and 0.845％,respectively,for the Gaojing-1 02 satellite,these values are 2.609％,2.268％and 0.888％.The results demonstrate that the statistical calibration method based on mass on-orbit data can effectively improve the radiometric quality of the Siwei Gaojing-1 01 and 02 satellite images,providing strong support for the routine production and high-quality quantitative applications of Gaojing satellite data products.关键词
四维高景一号01/02星/相对辐射定标/在轨统计/辐射质量Key words
Siwei Gaojing-1 01 and 02 satellites/relative radiometric calibration/on-orbit statistics/radiometric quality分类
天文与地球科学引用本文复制引用
李娟,陈军,兰穹穹,腾格尔,龙小祥,田甜,胡骁,李晔..四维高景一号01/02星在轨相对辐射定标与验证分析[J].无线电工程,2025,55(12):2335-2343,9.基金项目
空天地一体化遥感数据综合检验与质量追溯技术(2023YFB3905800)Integrated Space-Air-Ground Remote Sensing Data Validation and Quality Traceability Technology(20223YFB3905800) （2023YFB3905800）
