hello,
i am working on flood maps generation using time series imagery of sentinel-1. i am noticed there are two different pass on Sentinel ; ascending and descending. i want to apply the same treshold value of the backscatter to all images band (sigma_vv) to generate my flood maps. i want to do it using bandmath “if Sigma0VV_db <-15 then 1 else NaN”_ . The area is relatively flat anyway…
so my question, is it correct to apply the same treshold backscatter value to all images ascending and descending? or do i need to apply different value for each pass? how significant will the differences of the pass affect my result?
thank you and much appreciation…
