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首页> 外文期刊>Geoscience and Remote Sensing, IEEE Transactions on >Spectral Compatibility of the NDVI Across VIIRS, MODIS, and AVHRR: An Analysis of Atmospheric Effects Using EO-1 Hyperion
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Spectral Compatibility of the NDVI Across VIIRS, MODIS, and AVHRR: An Analysis of Atmospheric Effects Using EO-1 Hyperion

机译：NDVI跨VIIRS，MODIS和AVHRR的光谱兼容性：使用EO-1 Hyperion的大气效应分析

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摘要

We evaluated the cross-sensor compatibilities of the normalized difference vegetation index (NDVI) across the Visible/Infrared Imager/Radiometer Suite (VIIRS), Moderate Resolution Imaging Spectroradiometer (MODIS), and the National Oceanic and Atmospheric Administration (NOAA)-14 and NOAA-19 Advanced Very High Resolution Radiometer (AVHRR) (AVHRR/2 and AVHRR/3) bandpasses using a global set of Earth Observing One Hyperion hyperspectral data. Five levels of atmospheric correction were simulated to examine the impact of the atmosphere on intersensor NDVI compatibility. These were the uncorrected “top-of-atmosphere”; Rayleigh (RAY); Rayleigh and ozone (RO); Rayleigh, ozone, and water vapor (ROW); and total atmosphere-corrected “top-of-canopy (TOC)” reflectances. Among all possible sensor pairs examined, the highest compatibility was observed for VIIRS versus MODIS. Cross-sensor NDVI relationships between the two sensor bandpasses remained nearly the same throughout all levels of atmospheric correction. AVHRR/3-versus-AVHRR/2 NDVI relationships changed very little and also showed an equivalent level of compatibility to VIIRS versus MODIS across all levels of atmospheric correction although they were subject to systematic differences. Intersensor NDVI compatibilities of VIIRS and MODIS to AVHRR/2 and to AVHRR/3 were lower due primarily to the differential sensitivities of these sensors' near-infrared bands to the atmospheric water vapor effects. Comparisons of cross-sensor NDVI compatibilities where operational atmospheric correction schemes were assumed for each of the sensors suggest the need of VIIRS TOC NDVI for long-term continuity with MODIS and AVHRR, which is not currently produced as part of the standard VIIRS Vegetation Index Environmental Data Record.
机译：我们评估了跨可见/红外成像仪/辐射仪套件（VIIRS），中分辨率成像光谱仪（MODIS）以及美国国家海洋与大气管理局（NOAA）-14的归一化差异植被指数（NDVI）的跨传感器兼容性NOAA-19高级超高分辨率辐射计（AVHRR）（AVHRR / 2和AVHRR / 3）带通使用一组全球地球观测一个Hyperion高光谱数据。模拟了五个级别的大气校正，以检查大气对传感器间NDVI兼容性的影响。这些是未经校正的“大气层”；瑞利（RAY）;瑞利和臭氧（RO）；瑞利，臭氧和水蒸气（ROW）；以及总的大气校正“顶篷（TOC）”反射率。在所有可能的传感器对中，VIIRS与MODIS的兼容性最高。在大气校正的所有水平上，两个传感器带通之间的跨传感器NDVI关系几乎保持相同。 AVHRR / 3-versus-AVHRR / 2 NDVI的关系变化很小，并且在所有级别的大气校正中也显示出与VIIRS和MODIS等效的兼容水平，尽管它们存在系统差异。 VIIRS和MODIS对AVHRR / 2和AVHRR / 3的传感器间NDVI兼容性较低，这主要是由于这些传感器的近红外波段对大气水蒸气效应的敏感性不同。跨传感器NDVI兼容性的比较（假设每个传感器均采用可操作的大气校正方案）表明，需要VIIRS TOC NDVI才能与MODIS和AVHRR长期保持连续性，目前尚未将其作为标准VIIRS植被指数的一部分数据记录。

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