Exporting "view_zenith" and "view_azimuth"

Optical Toolbox
#1

Hi,

I would like to export the “view_zenith” and “view_azimuth” bands for B08 from a Sentinel-2b image. I’m new to SNAP, and it’s a little confusing at the beginning.

I import the file, and can see all the different bands. I understand I need to resample the view and zenith files, but when I go to the S2 Resampling tool, I don’t seem to have any option to select the view and zenith bands so I can upsample them?..

… all I can do is select the file “MTD_MSIL1C.xml” in the I/O Parameters tab, which seems to select the entire SAFE file with all bands. Because I want the “view” files resampled to the same resolution as band 08, I need to massively upsample them. So I only want to do this for the relevant view bands (“view_zenith_B8” and “view_azimuth_B8”), rather then upsample everything in the entire SAFE directory. When I try to do that, SNAP 6.0 crashes (everything is up to date).

Is this the correct workflow?.. i.e. I need to upsample everything to 10 m, and then export the relevant band? (this seems very inefficient, so I’m sure this can’t be right)

Any thoughts most welcome!

#2

The trick is not to store the resampled product to disk immediately. If not stored to disk it is not computed yet. Now you can create a subset which only contains the view angle bands. Only these two bands will be resampled and saved to disk.