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: Two indices can be calculated for carotenoid content

Structure Insensitive Pigment Index (SIPI):

$SIPI\quad =\frac { { R }_{ Band8 }\quad -\quad { R }_{ Band1 } }{ { R }_{ Band8 }\quad -\quad { R }_{ Band4 } }$

and Pigment Specific Simple Ratio (PSSR):

$PSSR\quad =\frac { { R }_{ Band8 } }{ { R }_{ Band4 } }$

Accuracy: Product is new and has not been validated.

Reference:

Penuelas, J., Frederic, B. & Filella, I. Semi-Empirical Indices to Assess Carotenoids/Chlorophyll-a Ratio from Leaf Spectral Reflectance. Photosynthetica 31, 221–230 (1995).

Blackburn, G. A. Spectral indices for estimating photosynthetic pigment concentrations: A test using senescent tree leaves. Int. J. Remote Sens. 19, 657–675 (1998).