Normalized Burn Area (NBR):

NBR_June
($1.B8 - $1.B12) / ($1.B8 + $1.B12)

NBR_July
($2.B8 - $2.B12) / ($2.B8 + $2.B12)


Burn Severity (dNBR):

N$1.BR_June - $2.NBR_July