Information for Sensor and Index

Formula

General Formula	$(n (1 - 0.25 n) - \frac{RED - 0.125}{1 - RED})$
Specific Formula	$(\frac{2 ({VNIR_Band3N}^{2} - {VNIR_Band2}^{2}) + 1.5 VNIR_Band3N + 0.5 VNIR_Band2}{VNIR_Band3N + VNIR_Band2 + 0.5} (1 - 0.25 \frac{2 ({VNIR_Band3N}^{2} - {VNIR_Band2}^{2}) + 1.5 VNIR_Band3N + 0.5 VNIR_Band2}{VNIR_Band3N + VNIR_Band2 + 0.5}) - \frac{VNIR_Band2 - 0.125}{1 - VNIR_Band2})$
Calculated	Automatic
Comment

Sensor

Name	ASTER
Full Name	Advanced Spaceborne Thermal Emission and Reflection Radiometer
Bands	15
Spectrum [nm]	520-11650
Spat.Res. [m]	15-90
Inclination	98.3
Platform
Operator	NASA
Date of Launch	1999-12-18
Comment
Usable for Indices	yes
Description

Index

Name	Global Environment Monitoring Index
Abbreviation	GEMI
Formula	$(n (1 - 0.25 n) - \frac{RED - 0.125}{1 - RED})$
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	Heiskanen, J. - Estimating aboveground tree biomass and leaf area index in a mountain birch forest using ASTER satellite data	2006

Visualisation

Sensor

Index