Information for Sensor and Index

Formula

General Formula ( n ( 1 - 0.25 n ) - RED - 0.125 1 - RED )
Specific Formula ( 2 ( 22 - 12 ) + 1.5 2 + 0.5 1 2 + 1 + 0.5 ( 1 - 0.25 2 ( 22 - 12 ) + 1.5 2 + 0.5 1 2 + 1 + 0.5 ) - 1 - 0.125 1 - 1 )
Calculated Automatic
Comment

Sensor

Name AVHRR
Full Name Advanced Very High Resolution Radiometer
Bands 6
Spectrum [nm] 580-12500
Spat.Res. [m] 1100-1100
Inclination 0
Platform TIROS-N / NOAA / METOP
Operator NOAA (National Oceanic and Atmospheric Administration)
Date of Launch 1978-10-13
Comment NOAA-N (NOAA-18): Date of launch: 20 May 2005 NOAA-19: Date of launch: 6 Feb 2009
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 Leprieur, C.; Kerr, Y. H.; Pichon, J. M. - Critical assessment of vegetation indices from AVHRR in a semi-arid environment 1996
3 Pinty, B.; Verstraete, M. M. - GEMI: a non-linear index to monitor global vegetation from satellites 1992

Visualisation

Sensor


Index