Radar Vegetation Index

esilveira · January 19, 2021, 3:01pm

Hi! Do you know how to calculate the RVI using SEntinel 1 in GEE? The values are in db and I have to convert it to linear because the formula is RVI = 4VH / VH + VV

Thanks

aisyahrasyid · March 24, 2021, 6:15am

Hi,

I was trying to convert my sigma values into the power unit (dB to linear), but having a problem with the expression I write (as in the image below). does the formula is wrong? I am using the formula referring to Tomcater’s post: Creating Radar Vegetation Index

could you advise me? thanks.

ABraun · March 24, 2021, 8:41am

please try

10^(ABS(Sigma0_HV_db)/10)

Naveen · June 22, 2021, 7:22am

Can we use gamma0 instead of sigma0 to calculate RVI?

Naveen · June 22, 2021, 7:29am

Sorry, I did not get it. Why this multiplication?
RVI = (4*(Sigma0_VH))/(Sigma0_VV + Sigma0_VH). Right?

ABraun · June 22, 2021, 8:48am

The calculation refers to the custom script mentioned in the first post. Different papers might use other formulas.