The TCARI operator algorithm computes the Transformed Chlorophyll Absorption in Reflectance Index from a given product.

The TCARI results from the following equation:

TCARI = 3 * ((RE1 - R) - 0.2 * (RE1 - G) * (RE1 / R))

, where:

The bands are:

- G is the Green band
- RE1 is the Red Edge 1 band
- R is the Red band

Also the processor computes an additional flags band called 'tcari_flags' with the following bit coding:

Bit Position	Description
Bit 0	The computed value for TCARI is NAN or is Infinite
Bit 1	The computed value for TCARI is less than -1 (minus one)
Bit 2	The computed value for TCARI is greater than 1 (one)