Hello to all friends and experts
I have seen in some crop mapping articles (rice maping with phenology,…) that layerstacked Sentinel-1 time series and Landsat 8 NDVI time series images and use them in classification.
Now I have a few questions to ask:
1- How is this layerstacking of NDVI time series and Sentinel-1 time series images possible?
2- Do VH / VV images really mean the ratio of VH to VV that should be written and executed in SNAP Band math? How to calculate this amount? Should it be calculated before converting to decibels or after?
3- To stacking Sentinel 1 images with Landsat 8 NDVI in ArcGIS, do we have to change the spatial resolution of Sentinel-1 images? For example, from 10 to 30 meters.
Or, for example, with the same spatial resolution of 10 meters Sentinel-1 and 30 meters Landsat 8, it is possible to map crops such as rice with the help of classification algorithms such as random forest?
I need your guidance, dear experts
Thanks