Time-series S1 GRD data

Hello colleagues! I have a question about time-series data. Could I simply interpolate dB-values between acquisition dates for making, for example, 3-day peridiocity (instead of 6- or 12-days available)? How could I solve it? Maybe, you have some papers with decisions on it. How could I account, in this problem, for some error acquisitions (for example, rainy days)?

I think this is possible but maybe not at the pixel level because speckle is too strong to get smooth time series. To be ablet to detect recurring trends you need really much data. In this article, it was done with all Landsat images.