Information for Sensor and Index

Formula

General Formula	$(n (1 - 0.25 n) - \frac{RED - 0.125}{1 - RED})$
Specific Formula	$(\frac{2 ({W18}^{2} - {W14}^{2}) + 1.5 W18 + 0.5 W14}{W18 + W14 + 0.5} (1 - 0.25 \frac{2 ({W18}^{2} - {W14}^{2}) + 1.5 W18 + 0.5 W14}{W18 + W14 + 0.5}) - \frac{W14 - 0.125}{1 - W14})$
Calculated	Automatic
Comment

Sensor

Name	ChrisProbaM2
Full Name	Compact High Resolution Imaging Spectrometer - Project for On-Board Autonomy - Mode2
Bands	18
Spectrum [nm]	406-1036
Spat.Res. [m]	17-17
Inclination	0
Platform	Proba
Operator	ESA
Date of Launch	2001-10-22
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

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Sensor

Index