The formula should be as follow: TSAVI = s * (IR_factor * near_IR - s * red_factor * red - a) / (s * IR_factor * near_IR + red_factor * red - a * s + X * ( 1 + s * s)) instead of: TSAVI = s * (IR_factor * near_IR - s * red_factor * red - a) / (a * IR_factor * near_IR + red_factor * red - a * s + X * ( 1 + s * s))
The formula should be as follow:
TSAVI = s * (IR_factor * near_IR - s * red_factor * red - a) / (s * IR_factor * near_IR + red_factor * red - a * s + X * ( 1 + s * s))
instead of:
TSAVI = s * (IR_factor * near_IR - s * red_factor * red - a) / (a * IR_factor * near_IR + red_factor * red - a * s + X * ( 1 + s * s))