Stacking S1 and S2 data

[FedericoF]

An alternative way to snap Sentinel-1 GRDH pixel grid to Sentinel-2 pixel grid is to set the ‘standardGridOrigin’ of the output Sentinel-1 product when applying the Range Doppler Terrain Correction.
This could be done by setting <standardGridOriginX> and <standardGridOriginY> parameters in the Range Doppler Terrain Correction operator.

I believe this solution could reduce as less as possible the introduction of artifacts. Later, a stacking operator should be used in order to stack together (multitemporal) Sentinel-1 and Sentinel-2 data.

I have shared a GPF graph that is preprocessing Sentinel-1 GRDH data taking into account this solution to snap output images to Sentinel-2 grids:

Sentinel-1 GRD preprocessing graph

Standard workflow for the preprocessing of Sentinel-1 GRDH data. The GPF graph executes a Sentinel-1 GRDH preprocessing workflow that consists of seven processing steps, applying a series of standard corrections: Apply Orbit File Thermal Noise Removal Border Noise Removal Calibration Speckle filtering (optional) Range Doppler Terrain Correction Conversion to dB Sentinel-1 GRD products can be spatially coregistered to Sentinel-2 MSI data grids, in order to promote the use of satellite virtual …

Federico