Information for Sensor and Index

Formula

General Formula	$(n (1 - 0.25 n) - \frac{RED - 0.125}{1 - RED})$
Specific Formula	$(\frac{2 (8^{2} - 6^{2}) + 1.5 8 + 0.5 6}{8 + 6 + 0.5} (1 - 0.25 \frac{2 (8^{2} - 6^{2}) + 1.5 8 + 0.5 6}{8 + 6 + 0.5}) - \frac{6 - 0.125}{1 - 6})$
Calculated	Automatic
Comment

Sensor

Name	SeaWiFS
Full Name	Sea-viewing Wide Field of view Sensor
Bands	8
Spectrum [nm]	412-905
Spat.Res. [m]	0-0
Inclination	0
Platform	SeaStar/OrbView-2
Operator	GeoEye
Date of Launch	1999-08-01
Comment	OrbView-2: Date of launch: 1 August 1997
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