Below is my workflow to resample Sentinel-2:
I created a graph in SNAP with 4 operators: Read / Resample / Subset / Write
1. Read Sentinel-2 image:
- S2A_MSIL1C_xxxxxxxxxxxxxxx_xxxxx_xxxx_xxxxxx_xxxxxxxxxxx_
2. Resample:
- By pixel resolution (in m): 10
- Define resample algorithm:
Upsampling: Nearest
Downsampling: First
Flag downsampling: First
Resample on pyramid levels (for faster imaging): checked
3. Subset:
- Band 1 - 8 selected
- Geographic Coordinates defined
4. Write:
- Output saved as BEAM_DIMAP
I ran the same procedure with Landsat 8, and it worked fine without any issues.
Yes, all reflectance bands are necessary also the view and sun geometry grids.
Using the S2Resampling works but it is much slower then the generic resampling and the benfit it not very big for the C2RCC.