CAJ | 학술논문

空间调制干涉光谱成像仪不同于其他类型光谱成像仪,其得到的是包含地物空间信息和光谱信息的立方体干涉数据.该光谱成像仪由于原理特殊,在轨数据定标方法尚不成熟.文中介绍了一种基于统计思想来计算探测器CCD辐射模型的在轨相对辐射校正方法,并通过对"环境一号"A卫星上测得的实际在轨数据进行相应的处理,来验证该相对辐射校正处理效果.结果表明该方法可以达到修正CCD响应不均匀性、光场不均匀性和减小非线性相位偏移的双重作用,提高复原光谱的精度.
공간조제간섭광보성상의불동우기타류형광보성상의,기득도적시포함지물공간신식화광보신식적립방체간섭수거.해광보성상의유우원리특수,재궤수거정표방법상불성숙.문중개소료일충기우통계사상래계산탐측기CCD복사모형적재궤상대복사교정방법,병통과대"배경일호"A위성상측득적실제재궤수거진행상응적처리,래험증해상대복사교정처리효과.결과표명해방법가이체도수정CCD향응불균균성、광장불균균성화감소비선성상위편이적쌍중작용,제고복원광보적정도.
The spatially modulated imaging Fourier transform spectrometer (SMIFTS) is different from other spectrometers. Its interference data cube consists of one dimensional spatial information and one dimensional spectral information of land. Because of its special theory, the on-board data calibration of SMIFTS is imperfect. A method of relative radiometric calibration was introduced to generate CCD models of the detectors,which was based on statistics method, and the real on board data of HJ-1A was used to validate it. The results indicate that the method can correct the difference of CCD response and the difference of the imported light field, reduce the nonlinear offsetting of phase, and can raise the precision of spectrum reproduction.