Same reference in coregistration of multiple S1 TOPS interferograms

how can I have many interferograms all with the same reference?

Actually the default will give at georeferenced geometry a shift of one or a few of pixels misregistration.

In the coregistration step can I use a single reference acquisition for all the pairs (or just the DEM simulation in slant range)?

This way all the terrain corrected interferograms will be ready for multi-interferogram calculations (e.g. stacking, SBAS).

What is currently the preferable way to do this?

I have also read the following but they are not current and conclusive:

thank you

maybe this is part of the answer:

Dear colleagues,
since I’m facing the same situation as described above I’d like to ask if any progress is made towards coregistration/processing to one and same master.

Thank you.