there is no direct transfer of backscatter intensity to soil moisture. Please go through the suggestions made here: Soil moisture mapping using Sentinel-1-Data and SNAP? and here Soil moisture identification -Sentinel
This could be helpful as well,
How to Download Daily Soil Water Index from Copernicus Global Land Service
Determination of Soil Moisture for a Region Using open Source Data
Thank you for information
Can you help me to find paper or reference to calculate soil moisture with GRH product.
Regards
@johngan has given very valuable comments and literature references here: Soil moisture identification -Sentinel
Thanks for your response
you need a shapefile with attributes (moisture), import it in SNAP and use the correlative plot view.
how can i get shapefile sir?
measure soil moisture in your study area at the time when the image is acquired and locate the meastrements by a GPS device, for example.
Yes sir, I have these data
But i don’t know how to import these data to SNAP
Why not try this one - https://land.copernicus.eu/global/themes/Vegetation . This is verified product.
For SHP files import just do File->Import->VectorData->ESRI Shapefile
Hi @hriston_bg,
But when I search Surface Soil Moisture, I don’t find my study area because Spatial information is only in Europe
@Andiray You may try Vegetation Condition Index as a proxy for SM.
The global product is here - https://land.copernicus.eu/global/products/vci
First you need a shapefile with numerical values (hoehe_cm in my case)
Load it into SNAP and overlay it with your SAR data
Then open the correlative plot view
Select the point shapefile and the attribute and correlate the raster values with the point information
Hi @ABraun, how to make this shapefile? I only have ground data but I don’t know how to make it to shapefile.
I have coordinate point and value of soil moisture in ground data. I’m so sorry. I don’t have basic in SNAP
Thanks
SNAP can import csv files when they are formatted correctly.
If not, load the coordinates (and moisture attribute) in a GIS and export it as a shapefile. There are lots of tutorials on this around.