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Original Articles

Atmospheric Effects Due to Topography on Modis Vegetation Index Data Simulated from Aviris Imagery over Mountainous Terrain

Pages 283-291 | Published online: 01 Aug 2014
 

RÉSUMÉ

Une simulation de données du spectroradiomètre MODIS-EOS a été effectuée spectralement et spatialement à l'aide d'une série de données AVIRIS d'un terrain montagneux situé en Colombie-Britannique. L'influence des variations atmosphériques dues à l'élévation du terrain sur les indices de végétation calculés à partir des données AVHRR et des données simulées MODIS a été étudiée. Les résultats montrent qu'il existe une dépendance importante entre l'élévation du terrain et l'indice de végétation par différence normalisée (IVDN) et que celle-ci augmente proportionnellement à la diminution de la densité de la végétation.

SUMMARY

Image simulation of EOS MODIS data has been carried out spectrally and spatially using an AVIRIS data set acquired over mountainous terrain in British Columbia. The influence of atmospheric variations due to terrain elevation on vegetation indices derived from NOAA A VHRR and simulated EOS MODIS data types has been investigated. The results indicate that the terrain elevation dependence of the Normalized Difference Vegetation Index (NDVI) is significant and increases with decreasing vegetation density.

Additional information

Notes on contributors

P.M. Teillet

P.M. Teiltet and K. Staenz are with the Canada Centre for Remote Sensing, 588 Booth Street, Ottawa, Ontario K1A 0Y7.

K. Staenz

P.M. Teiltet and K. Staenz are with the Canada Centre for Remote Sensing, 588 Booth Street, Ottawa, Ontario K1A 0Y7.

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