首页> 外文会议>Conference on Algorithms for Multispectral, Hyperspectral, and Ultraspectral Imagery VI 24-26 April 2000 Orlando, USA >Wavelength Calibration and Instrument Line Shape Estimation of a LWIR hyperspectral Sensor from In-Scene Data
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Wavelength Calibration and Instrument Line Shape Estimation of a LWIR hyperspectral Sensor from In-Scene Data

机译:基于现场数据的LWIR高光谱传感器的波长校准和仪器线形估计

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摘要

Estimates have been made of wavelength calibration and instrument line shape (ILS) for the SEBASS hyperspectral sensor. FASCODE estimates of at-sensor radiance were made, convolved with gaussian or triangular ILS functions of various widths, had slight wavelength shifts inctroduced and were downsampled to SEBASS wavelengths. The downsampled FASCODE estimates were compared to measured data for 21 atmospheric absorption features between 8-13 um. The combination of ILS width and wavelength shift providing the best match was recorded. The technique was sensitive to wavelength calibration, but relatively insensitive to ILS width. Results demonstrated that SEBASS wavelength calibration was within +/-0.5 channel widths.
机译:已经对SEBASS高光谱传感器的波长校准和仪器线形(ILS)进行了估算。进行了FASCODE传感器辐射的估计,并与各种宽度的高斯或三角形ILS函数进行了卷积,引入了轻微的波长偏移,并下采样至SEBASS波长。将下采样的FASCODE估计值与8-13 um之间的21个大气吸收特征的测量数据进行比较。记录了提供最佳匹配的ILS宽度和波长偏移的组合。该技术对波长校准敏感,但对ILS宽度相对不敏感。结果表明SEBASS波长校准在+/- 0.5通道宽度内。

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