I would just like to ask which products should I search for if I want to extract wind speeds using Wind Field Estimation? (i.e. 1. related to satellite platform, 2. product type, 3. Polarisation - which from what I know, should be VV, 4. Sensor Mode)
If possible, a step by step instruction on how to process will also greatly be appreciated. As far as I know, I need to start with Calibration and Speckle Filtering before moving on to Wind Field Estimation. Is it okay that I just use the default parameters or should I tweak something?
The steps are basically the ones of the wind field tool: You enter a Sentinel-1 GRD product and click through the various steps. After the last step, you have a vector file in the resulting product which shows the arrows and directions of wind fields.
But you will have to try around with the settings a bit because they strongly change with window size and other variables.
So now I have downloaded a couple of Sentinel-1 GRD products from the SciHub (https://scihub.copernicus.eu/dhus/#/home), but when I tried processing them using wind field estimation, it was saying that Sentinel-1A is different from Sentinel-1. What is the difference between the two and where can I obtain Sentinel-1 datasets since Scihub only offers Sentinel-1A or 1B products?
Attached is the error image which says that Sentinel-1A is not a valid mission.
For the window size, is it basically looking at it as the resolution of the estimation? If yes, what is the minimum value that I can assign for it? Of course, I will want to have the smallest value, probably even less than 1km, but I do not know what will its effect be on the estimates.
I would just like to ask the instruction on how to process if I want to extract wind speeds using quad-pol SLC RADARSAT-2 or Sentinel-1 GRD products? As far as I know, the Sentinel-1 GRD products is the duad-pol (VV/VH).I used the single-polarization( VV) ENSISAT-ASAR data to extract the wind field results successfully, but the full polarization RADARSAT-2 data failed all the time. What adjustments do I need to make in the process?