as all the processing is done in matlab, there is probably an easier way, but when I want to work with the points in a GIS I use this work around:
- Export it as a kml file as described in chapter 7 of the manual
ps_gescatter('velocity_export.kml', ph_disp, 1, 0.4)
- Convert the kml to a csv table
ogr2ogr -select description velocity_table.csv velocity_export.kml