ISCE2 stack unkown CRS problem

[suatcoskun]

I prepared my stack with isce2 stackSentinel.py option. Than processed it with dolphin and everything goes fine and I cerated my output files. But when I tried to open my velocity.tif file in QGIS I took unknown CRS warning. (This layer appears to have no projection specification). Maybe it will be about my isce2 .vrt outputs. Do you know any way to fix this situation?

P.S. I added my output folder and velocity .tif file.

bursa.zip