The TCI operator algorithm computes the Triangular Chlorophyll Index from a given product.

The TCI results from the following equation:

TCI = 1.2 * (RE1 - G) - 1.5 * (R - G) * pow((RE1 / R) , 0.5)

, 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 'tci_flags' with the following bit coding:

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