CAJ | 학술논문

ZY-3是我国首颗民用高空间分辨率光学传输型立体测图卫星，可为国土资源调查、生态环境监测等发挥重要作用，而大气校正是制约其广泛定量应用的关键问题之一。由于实测地面光谱数据和大气参数难以实时获取，针对这种情况下如何反演得到高空间分辨率卫星精确的地表反射率这一问题，基于2012年内蒙古野外实验实测数据，对四种暗像元大气校正方法进行了分析与评价研究。分析了四种暗像元大气校正算法中的关键参数对ZY-3 CCD数据应用效果的影响，结果表明：（1）四种暗像元大气校正方法在第1，2和3波段均有明显的校正效果，其中DOS4方法在第4波段大气校正效果最好，DOS1和DOS3方法在第4波段大气校正效果不明显，DOS2方法在第4波段大气校正效果最差。（2）DOS1方法大气校正结果在4个波段的相对误差均大于10％。DOS2方法在第1波段校正效果最好（AE＝0．0019和RE＝4．32％），而在第4波段校正误差最大（AE＝0．0464和 RE＝19．12％）。DOS3方法大气校正结果在4个波段的相对误差均约10％左右。（3）DOS4方法大气校正结果在4个波段的绝对误差均小于0．02和相对误差均小于10％，大气校正精度最高。
ZY-3시아국수과민용고공간분변솔광학전수형입체측도위성，가위국토자원조사、생태배경감측등발휘중요작용，이대기교정시제약기엄범정량응용적관건문제지일。유우실측지면광보수거화대기삼수난이실시획취，침대저충정황하여하반연득도고공간분변솔위성정학적지표반사솔저일문제，기우2012년내몽고야외실험실측수거，대사충암상원대기교정방법진행료분석여평개연구。분석료사충암상원대기교정산법중적관건삼수대ZY-3 CCD수거응용효과적영향，결과표명：（1）사충암상원대기교정방법재제1，2화3파단균유명현적교정효과，기중DOS4방법재제4파단대기교정효과최호，DOS1화DOS3방법재제4파단대기교정효과불명현，DOS2방법재제4파단대기교정효과최차。（2）DOS1방법대기교정결과재4개파단적상대오차균대우10％。DOS2방법재제1파단교정효과최호（AE＝0．0019화RE＝4．32％），이재제4파단교정오차최대（AE＝0．0464화 RE＝19．12％）。DOS3방법대기교정결과재4개파단적상대오차균약10％좌우。（3）DOS4방법대기교정결과재4개파단적절대오차균소우0．02화상대오차균소우10％，대기교정정도최고。
The present paper performed the evaluation of four dark-object subtraction(DOS)atmospheric correction methods based on 2012 Inner Mongolia experimental data.The authors analyzed the impacts of key parameters of four DOS methods when they were applied to ZY-3 CCD data.The results showed that (1 )All four DOS methods have significant atmospheric correction effect at band 1 ,2 and 3 .But as for band 4 ,the atmospheric correction effect of DOS4 is the best while DOS2 is the worst;both DOS1 and DOS3 has no obvious atmospheric correction effect.(2 )The relative error (RE)of DOS1 atmospheric correction method is larger than 10% at four bands;The atmospheric correction effect of DOS2 works the best at band 1(AE (absolute er-ror)= 0. 001 9 and RE= 4. 32%)and the worst error appears at band 4(AE= 0. 046 4 and RE= 19. 12%);The RE of DOS3 is about 10% for all bands.(3)The AE of atmospheric correction results for DOS4 method is less than 0. 02 and the RE is less than 10% for all bands.Therefore,the DOS4 method provides the best accuracy of atmospheric correction results for ZY-3 im-age.