Dear Sentinel 1 data users.
When I open Sentinel-1 GRDH product, I see: Amplitude and Intensity.
When I open Sentinel-1 RAW product, I see: latitude and longitude only (what is usability of such product?)
When I open Sentinel-1 SLC product, I see: i_IW1,q_IW1,intensity_IW1,i_IW2,q_IW2,intensity_IW2,i_IW3,q_IW3 and intensity_IW2
I can't find any documentation, metadata, any basic information about bands stored in Sentinel-1 products.
I've tried to use gdalinfo tool, but it says that it is unable to open .safe file.
I can't find proper information at http://step.esa.int/main/doc/tutorials/sentinel-1-toolbox-tutorials/
Could you tell me:
what are the i, q and intensity and their units, please?
how can I obtain sigma (backscatter)? Am I able to receive it from all Sentinel products (SLC, GRD and RAW)?
why backscatter is not just simply available after opening Sentinel 1 products? I thought that it is directly measured by the radar