GeoEye-1 Ctr4
Carter Stress Index 4 for GeoEye-1
Vegetation Satellite Provider: MAXAR
Applications
Plant stress monitoring
Chlorophyll-related stress detection
Vegetation health assessment
Early warning of plant decline
Precision agriculture
Quick Stats
Category: vegetation
Sensor: GeoEye-1
Provider: MAXAR
Bands Used: 2
Description
A vegetation stress index using the ratio of red edge (710nm) to NIR (760nm) reflectance. This index is particularly sensitive to changes in chlorophyll content and plant stress.
Formulas
General Formula
GeoEye-1 Specific Formula
RE1_710 / NIR_760Spectral Band Visualization
Band Wavelengths
re1: 710
nir: 760
Code Examples
ctr4.py
References
Carter (1994). Ratios of leaf reflectances in narrow wavebands as indicators of plant stress.
le Maire et al. (2004). Towards universal broad leaf chlorophyll indices using PROSPECT simulated database and hyperspectral reflectance measurements.
Main et al. (2011). An investigation into robust spectral indices for leaf chlorophyll estimation.