I would like to do crop classification using sentinel-1, so what is the suitable polarization and the orbital pass
VH is more sensitive to volume scattering and often preferred for classification. There are also approaches which use both VV and VH as input features for classification.
I don’t think there is a “good” or “bad” orbit for classiciation, but there are some geometric sensitivities. Unexplained differences between different orbits
A tutorial on time-series analysis is currently in preparation.
what is about the best frequency for crop classification using radar sensor?