Normalized Difference Vegetation Index with Atmospheric Correction for Satellite Images

Chien-Hui Liu

NDVI, Atmospheric Correction, Surface Reflectance, Remote Sensing.

Monitoring of vegetation using remote sensing is usually hampered by atmosphere. Therefore, in order to determine accurate NDVI, atmospheric correction (AC) is an essential work. Error in NDVI occurs when AC is omitted. In the paper, error of NDVI due to neglect of AC is estimated. A SPOT image covering Taoyuan, Taiwan is used. Mean NDVI of the image with AC, can increase to 0.39 using surface reflectance from 0.30 using top-of-atmosphere reflectance (without AC).  Error can be up to 0.095 NDVI unit. Hence, the error can be up to 32% when AC is neglected.

https://doi.org/10.31871/IJNTR.8.5.25