Information for Sensor and Index

Formula

General Formula ( n ( 1 - 0.25 n ) - RED - 0.125 1 - RED )
Specific Formula ( 2 ( near_infrared2 - red2 ) + 1.5 near_infrared + 0.5 red near_infrared + red + 0.5 ( 1 - 0.25 2 ( near_infrared2 - red2 ) + 1.5 near_infrared + 0.5 red near_infrared + red + 0.5 ) - red - 0.125 1 - red )
Calculated Automatic
Comment

Sensor

Name SPOT 4
Full Name Système Probatoire d’Observation de la Terre, später: Satellite Pour l’Observation de la Terre
Bands 5
Spectrum [nm] 500-1750
Spat.Res. [m] 10-20
Inclination 0
Platform SPOT
Operator CNES (Centre National d'Etudes Spatiales)
Date of Launch 1998-04-24
Comment Stereo capability
Usable for Indices yes
Description

Index

Name Global Environment Monitoring Index
Abbreviation GEMI
Formula ( n ( 1 - 0.25 n ) - RED - 0.125 1 - RED )
Variables n = ( 2 * ( NIR ^2 - RED ^2) + 1.5 * NIR + 0.5 * RED ) / ( NIR + RED + 0.5 )
Expl. of Variables
Wavelengths 640:760,780:1400
Source Original formula
Description Bannari 1996

References

Nr. Author/Title Year Comment
1 Ceccato, Pietro; Flasse, Stéphane; Tarantola, Stefano; Jacquemoud, Stéphane; Grégoire, Jean-Marie - Detecting vegetation leaf water content using reflectance in the optical domain 2001
2 Rondeaux, Geneviève; Steven, Michael; Baret, Frédéric - Optimization of soil-adjusted vegetation indices 1996

Visualisation

Sensor


Index