摘要
提出了一种基于灰阶靶标的多传感器协同辐射定标方法,通过有效利用具有自动化观测设备的固定定标场、合理共享其他卫星的移动靶标场来提高定标频次。根据灰阶靶标的光谱平坦特性及同平台多传感器观测时相、几何、视场的一致性,建立了多光谱相机与全色高分辨相机间的辐亮度关系模型,实现了全色高分辨相机对多光谱相机的协同辐射定标。天绘一号卫星星地同步实验结果表明:建立的辐亮度关系模型具有通用性;多光谱相机协同与场地辐射定标系数相对差异小于5.3%;协同辐射定标精度优于5%,在提高效率的同时,可获取与场地辐射定标相当的精度。
Using the fixed calibration field with automatic observation equipment and sharing the other satellite′s moving targets fields, a multi-sensor cooperative radiometric calibration method is proposed to improve calibration frequency. This method is developed based on the spectral flatness of the gray-scale tarps and the consistency of observation phase, geometry and field of the multi-sensors on the same platform. The radiance relationship model between the multi-spectral camera and the high resolution panchromatic camera is established, and then the cooperative radiometric calibration of the multi-spectral camera is realized by the high resolution panchromatic camera. The synchronous experiment results of Mapping Satellite-1 show that the radiance relationship model is universal, the relative difference between cooperative and site radiometric calibration coefficient of the multi-spectral camera is less than 5.3%, and the cooperative radiometric calibration precision is less than 5%. Compared with the site radiometric calibration, the same calibration precision is obtained while the calibration efficient is improved.
引文
[1] Wang R X,Hu X,Wang X Y,et al.The construction and application of Mapping Satellite-1 engineering[J].Journal of Remote Sensing,2012,16(S1):2-5.王任享,胡莘,王新义,等.“天绘一号”卫星工程建设与应用[J].遥感学报,2012,16(S1):2-5.
[2] Li S M,Li Y,Li J D.Mapping Satellite-1 transmission type photogrammetric and remote sensing satellite[J].Journal of Remote Sensing,2012,16(S1):10-16.李松明,李岩,李劲东.“天绘一号”传输型摄影测量与遥感卫星[J].遥感学报,2012,16(S1):10-16.
[3] Gu X F,Tian G L,Yu T,et al.The radiometric calibration principle and method of space remote sensor[M].Beijing:Science Press,2013:1-3.顾行发,田国良,余涛,等.航天光学遥感器辐射定标原理与方法[M].北京:科学出版社,2013:1-3.
[4] Wan Z,Li B Y,Liu Z X,et al.Spectral and radiometric calibrations for mapping satellite-1 camera[J].Optics and Precision Engineering,2015,23(7):1867-1873.万志,李葆勇,刘则洵,等.测绘一号卫星相机的光谱和辐射定标[J].光学精密工程,2015,23(7):1867-1873.
[5] Huang H L,Yi W N,Qiao Y L,et al.On orbit radiometric calibration for Mapping Satellite-1 sensor[J].Journal of Remote Sensing,2012,16(S1):22-27.黄红莲,易维宁,乔延利,等.“天绘一号”卫星在轨辐射定标方法[J].遥感学报,2012,16(S1):22-27.
[6] Chen H Y,Li S L,Si X L,et al.Multispectral imager vicarious radiometric calibration based on gray-scale tarps[J].Journal of Remote Sensing,2012,16(S1):28-34.陈洪耀,李胜利,司孝龙,等.多光谱相机基于灰阶靶标的在轨绝对辐射定标[J].遥感学报,2012,16(S1):28-34.
[7] Xu W W,Zhang L M,Yang B Y,et al.On-orbit radiometric calibration based on gray-scale tarps[J].Acta Optica Sinica,2012,32(2):0212007.徐伟伟,张黎明,杨本永,等.基于多灰阶靶标的在轨辐射定标方法研究[J].光学学报,2012,32(2):0212007.
[8] He Z H,Zuo Z J,Liu D Z.Processing method of mapping satellite-1 image[J].Geospacial Information,2012,10(6):4-6.何忠焕,左志进,刘冬枝.天绘一号卫星遥感影像的处理方法[J].地理空间信息,2012,10(6):4-6.
[9] Qiu G G,Li X,Wei W,et al.Experiment and analysis of on-orbit radiometric calibration for remote sensors based on in-site automated observation technology[J].Acta Optica Sinica,2016,36(7):0701001.邱刚刚,李新,韦玮,等.基于场地自动化观测技术的遥感器在轨辐射定标试验与分析[J].光学学报,2016,36(7):0701001.
[10] Lü J Y,He M Y,Chen L,et al.Automated radiation calibration method based on Dunhuang radiometric calibration Site[J].Acta Optica Sinica,2017,37(8):0801003.吕佳彦,何明元,陈林,等.基于敦煌辐射校正场的自动化辐射定标方法[J].光学学报,2017,37(8):0801003.
[11] Li Z Z,Xu W,Fu Q Y,et al.Building and application for China Songshan artificial target Site[J].Journal of Atmospheric and Environmental Optics,2014,9(2):81-89.李照洲,徐文,傅俏燕,等.中国(嵩山)固定式靶标场建设及其应用[J].大气与环境光学学报,2014,9(2):81-89.
[12] Su W,Zhang M Z,Jiang K P,et al.Atmospheric correction method of Sentinel-2 satellite imagery[J].Acta Optica Sinica,2018,38(1):0128001.苏伟,张明政,蒋坤萍,等.Sentinel-2卫星影像的大气校正方法[J].光学学报,2018,38(1):0128001.