Multi-time composite in SNAP

snap
#1

Hello! Tell me how to make two optical images (2018-2019) SENTINEL-2 multi-time composite in the SNAP program. This is necessary to determine changes in forest cover, to identify logging.

#2

there are several ways of change detection

  1. classify forests in both images and then compare the results
  2. use the difference/ratio of reflectance of the infra-red band to see where the largest differences are. You can do this in the band maths once you have both images within one product (use the collocation module)
  3. Try the Forest Cover Change processor under Menu > Optical > Thematic Land Processing
#3

Thank you! I was prompted this way (raster - > geometric operations - > collocation) - it works!