Thank you for answer , I’m new in this and every answer helps me a lot
I don’t have any folder .SAFE
Do you know maybe where can I get it? Does it come with installation of PolSarpro or what
P:S. Sorry I didn’t know this forum isn’t about SNAP. Do you know any forum about SNAP which will be useful for me? Thank you
when you download Sentinel-1 data the extacted folder should be named something like
S1A_IW_SLC__1SDV_20160819T180458_20160819T180529_012673_013E7D_A686.SAFE
This forum is about SNAP. I don’t know if many experts for PolSARpro are here as well. That’s all
Sorry stupid question I just found it
Can you PLEASE write mi in few steps all what I need to do to determine changes on land using Sentinel 1-A images
Thank you
But I don’t know how to make a stack and create colour composite can you describe me in few steps please
Unforunately I must do tad with polarimetry
Please have a look at the tutorials. I don’t see much sense in telling you what to click when you don’t know what you’re doing?
Why do you have to use polarimetry for change detecion at all? This is far from being trivial.
You are right
That is sugesstion from my mentor to use polarimetry for change detection. For you, which method is better to use than polarimetry? And what accuracy I can get?
interferometry uses the phase of a signal instead of the backscatter intensity. It can be used to discriminate areas with high and low coherence. Unless you are not targeting one special class you can’t retrieve much information about changes with it. But you can use coherence as one parameter for change.
I have a problem with images. When I try to load images in PolSARPro i got this message “…the BMP file is not valid”. Another problem is when I look on google earth area of image it doesn’t match with that same area of image that I have download from Sentinel Data Hub. Do you know maybe why is that hapening?
No, I go to icon of Google Earth in Polsarpro and than “Open GEARTH_POLY File” --> find data with .kml extension in file of image I have download click Open and image open in Google Earth application. And it doesn’t match with area od image that is shown on Sentinel Data Hub??
I have had that problem when I try to import images. I also have a good laptop and that sholudn’t be a problem, so I just restart it and try again and it worked
I see you also work with Sentinel 1A images SLC, do you try to load images in google earth aplication?
I also restarted my laptop many times, but the same problem still appeared. Yes I use Sentinel-1A SLC data and loaded an image boundary (not SLC image) in google earth.
Than I really don’t know…
How do you load image boundary in google earth? I go to “Open GEARTH_POLY file” and than find a file with .kml extension and than open, but image boundary in google earth doesn’t match with image boundary from Sentinel Data Hub???