However,I installed the 64 bit version of SNAP and 32 bit python, but there are errors, so I installed 32 bit versions. I have encountered many errors.I was dizzy.But still thanks for your kindness.
@Smail have give me his solved method. Due to I waste too much time in this question, then now I’m willing to achieve my goal using Matlab first, then I will try his solution in my spare time.
Thank you,all.