Period: 2016 – present

Sensor: Sentinel 2 MSI

Frequency: 5 days at equator

Resolutions: 20m

Extent: Global

The product algorithm can be accessed here.

Algorithm description: MCARI (Modified Chlorophyll Absorption in Reflectance Index) is calculated from the reflectance in bands 3,4 and 5 of MSI sensor:

$MCARI\quad =\quad (({ R }_{ Band5 }\quad -\quad { R }_{ Band4 })\quad -\quad 0.2\quad ({ R }_{ Band5 }\quad -\quad { R }_{ Band3 }))\quad ({ R }_{ Band5 }/{ R }_{ Band4 })$

and the Chlorophyll Index is calculated as

$Chlorophyll\quad Red-Edge\quad =\quad { \left[ \frac { { R }_{ Band7 } }{ { R }_{ Band5 } } \right] }^{ -1 }$

Accuracy: Product is new and has not been validated.

Reference:

Daughtry, C. Estimating Corn Leaf Chlorophyll Concentration from Leaf and Canopy Reflectance. Remote Sens. Environ. 74, 229–239 (2000).